Version 0.2.63

Fix download()+ISIN

.github/workflows/deploy_doc.yml

@@ -3,7 +3,8 @@ name: Build and Deploy Sphinx Docs
 on:
   push:
     branches:
-      - dev-documented
+      - main
+      # - dev-documented
   workflow_dispatch:
 
 jobs:

.github/workflows/ruff.yml

@@ -9,5 +9,7 @@ jobs:
   ruff:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: chartboost/ruff-action@v1
+      - uses: actions/checkout@v4
+      - uses: astral-sh/ruff-action@v3
+        with:
+          args: check . --exclude yfinance/pricing_pb2.py

CHANGELOG.rst

@@ -1,6 +1,40 @@
 Change Log
 ===========
 
+0.2.63
+------
+Fix download(ISIN)  # 2531
+
+0.2.62
+------
+Fix prices 'period=max' sometimes failing  # 2509
+ISIN cache  #2516
+Proxy:
+- fix false 'proxy deprecated' messages
+- fix ISIN + proxy  #2514
+- replace print_once with warnings  #2523
+Error handling:
+- detect rate-limit during crumb fetch  #2491
+- replace requests.HTTPError with curl_cffi
+
+0.2.61
+------
+Fix ALL type hints in websocket #2493
+
+0.2.60
+------
+Fix cookie reuse, and handle DNS blocking fc.yahoo.com #2483
+Fixes for websocket:
+- relax protobuf version #2485
+- increase websockets version #2485
+- fix type hints #2488
+Fix predefined screen offset #2440
+
+0.2.59
+------
+Fix the fix for rate-limit #2452
+Feature: live price data websocket #2201
+
 0.2.58
 ------
 Fix false rate-limit problem #2430

CONTRIBUTING.md

@@ -1,37 +1,23 @@
 # Contributing
 
-> [!NOTE]
-> This is a brief guide to contributing to yfinance.
-> For more information See the [Developer Guide](https://ranaroussi.github.io/yfinance/development) for more information.
+yfinance relies on the community to investigate bugs and contribute code.
 
-## Changes
-
-The list of changes can be found in the [Changelog](https://github.com/ranaroussi/yfinance/blob/main/CHANGELOG.rst)
-
-## Running a branch
-
-```bash
-pip install git+ranaroussi/yfinance.git@dev # dev branch
-```
-
-For more information, see the [Developer Guide](https://ranaroussi.github.io/yfinance/development/running.html).
+This is a quick short guide, full guide at https://ranaroussi.github.io/yfinance/development/index.html
 
 ## Branches
 
 YFinance uses a two-layer branch model:
 
-* **dev**: new features & some bug-fixes merged here, tested together, conflicts fixed, etc.
+* **dev**: new features & most bug-fixes merged here, tested together, conflicts fixed, etc.
 * **main**: stable branch where PIP releases are created.
 
-> [!NOTE]
-> By default, branches target **main**, but most contributions should target **dev**. 
-> Direct merges to **main** are allowed if:
-> * `yfinance` is massively broken
-> * Part of `yfinance` is broken, and the fix is simple and isolated
-> * Not updating the code (e.g. docs)
+## Running a branch
 
-> [!NOTE]
-> For more information, see the [Developer Guide](https://ranaroussi.github.io/yfinance/development/branches.html).
+```bash
+pip install git+ranaroussi/yfinance.git@dev  # <- dev branch
+```
+
+https://ranaroussi.github.io/yfinance/development/running.html
 
 ### I'm a GitHub newbie, how do I contribute code?
 
@@ -39,39 +25,36 @@ YFinance uses a two-layer branch model:
 
 2. Implement your change in your fork, ideally in a specific branch
 
-3. Create a Pull Request, from your fork to this project. If addressing an Issue, link to it
+3. Create a [Pull Request](https://github.com/ranaroussi/yfinance/pulls), from your fork to this project. If addressing an Issue, link to it
 
-> [!NOTE]
-> See the [Developer Guide](https://ranaroussi.github.io/yfinance/development/contributing.html) for more information.
-
-### [How to download & run a GitHub version of yfinance](#Running-a-branch)
+https://ranaroussi.github.io/yfinance/development/code.html
 
 ## Documentation website
 
-The new docs website [ranaroussi.github.io/yfinance/index.html](https://ranaroussi.github.io/yfinance/index.html) is generated automatically from code. 
+The new docs website is generated automatically from code. https://ranaroussi.github.io/yfinance/index.html
 
-> [!NOTE]
-> See the [Developer Guide](https://ranaroussi.github.io/yfinance/development/documentation.html) for more information
-> Including how to build and run the docs locally.
+Remember to updates docs when you change code, and check docs locally.
+
+https://ranaroussi.github.io/yfinance/development/documentation.html
+
+## Git tricks
+
+Help keep the Git commit history and [network graph](https://github.com/ranaroussi/yfinance/network) compact:
+
+* got a long descriptive commit message? `git commit -m "short sentence summary" -m "full commit message"`
+
+* combine multiple commits into 1 with `git squash`
+
+* `git rebase` is your friend: change base branch, or "merge in" updates
+
+https://ranaroussi.github.io/yfinance/development/code.html#git-stuff
 
 ## Unit tests
 
 Tests have been written using the built-in Python module `unittest`. Examples:
 
-#### Run all tests: `python -m unittest discover -s tests`
+* Run all tests: `python -m unittest discover -s tests`
 
-> [!NOTE]
->
-> See the [Developer Guide](https://ranaroussi.github.io/yfinance/development/testing.html) for more information.
+https://ranaroussi.github.io/yfinance/development/testing.html
 
-## Git stuff
-### commits
-
-To keep the Git commit history and [network graph](https://github.com/ranaroussi/yfinance/network) compact please follow these two rules:
-
-* For long commit messages use this: `git commit -m "short sentence summary" -m "full commit message"`
-
-* `squash` tiny/negligible commits back with meaningful commits, or to combine successive related commits
-
-> [!NOTE]
-> See the [Developer Guide](https://ranaroussi.github.io/yfinance/development/contributing.html#GIT-STUFF) for more information.
+> See the [Developer Guide](https://ranaroussi.github.io/yfinance/development/contributing.html#GIT-STUFF) for more information.

README.md

@@ -53,6 +53,8 @@ Install `yfinance` from PYPI using `pip`:
 $ pip install yfinance
 ```
 
+### [yfinance relies on the community to investigate bugs and contribute code. Here's how you can help.](CONTRIBUTING.md)
+
 ---
 
 ![Star History Chart](https://api.star-history.com/svg?repos=ranaroussi/yfinance)

doc/source/advanced/caching.rst

@@ -1,47 +1,6 @@
 Caching
 =======
 
-Smarter Scraping
-----------------
-
-Install the `nospam` package to cache API calls and reduce spam to Yahoo:
-
-.. code-block:: bash
-
-   pip install yfinance[nospam]
-
-To use a custom `requests` session, pass a `session=` argument to
-the Ticker constructor. This allows for caching calls to the API as well as a custom way to modify requests via  the `User-agent` header.
-
-.. code-block:: python
-
-   import requests_cache
-   session = requests_cache.CachedSession('yfinance.cache')
-   session.headers['User-agent'] = 'my-program/1.0'
-   ticker = yf.Ticker('MSFT', session=session)
-   
-   # The scraped response will be stored in the cache
-   ticker.actions
-
-
-Combine `requests_cache` with rate-limiting to avoid triggering Yahoo's rate-limiter/blocker that can corrupt data.
-
-.. code-block:: python
-
-   from requests import Session
-   from requests_cache import CacheMixin, SQLiteCache
-   from requests_ratelimiter import LimiterMixin, MemoryQueueBucket
-   from pyrate_limiter import Duration, RequestRate, Limiter
-   class CachedLimiterSession(CacheMixin, LimiterMixin, Session):
-      pass
-
-   session = CachedLimiterSession(
-      limiter=Limiter(RequestRate(2, Duration.SECOND*5)),  # max 2 requests per 5 seconds
-      bucket_class=MemoryQueueBucket,
-      backend=SQLiteCache("yfinance.cache"),
-   )
-
-
 Persistent Cache
 ----------------
 

doc/source/development/branches.rst

@@ -1,40 +0,0 @@
-Branches
----------
-
-To support rapid development without breaking stable versions, this project uses a two-layer branch model:
-
-.. image:: assets/branches.png
-   :alt: Branching Model
-
-`Inspiration <https://miro.medium.com/max/700/1*2YagIpX6LuauC3ASpwHekg.png>`_
-
-- **dev**: New features and some bug fixes are merged here. This branch allows collective testing, conflict resolution, and further stabilization before merging into the stable branch.
-- **main**: Stable branch where PIP releases are created.
-
-By default, branches target **main**, but most contributions should target **dev**. 
-
-**Exceptions**:
-Direct merges to **main** are allowed if:
-
-- `yfinance` is massively broken
-- Part of `yfinance` is broken, and the fix is simple and isolated
-- Not updating the code (e.g. docs)
-
-Rebasing
---------
-
-If asked to move your branch from **main** to **dev**:
-
-1. Ensure all relevant branches are pulled.
-2. Run:
-
-   .. code-block:: bash
-
-      git checkout {branch}
-      git rebase --onto dev main {brach}
-      git push --force-with-lease origin {branch}
-
-Running a branch
-----------------
-
-Please see `this page </development/running>`_.

doc/source/development/code.rst

@@ -0,0 +1,90 @@
+****
+Code
+****
+
+To support rapid development without breaking stable versions, this project uses a two-layer branch model:
+
+.. image:: assets/branches.png
+   :alt: Branching Model
+
+`Inspiration <https://miro.medium.com/max/700/1*2YagIpX6LuauC3ASpwHekg.png>`_
+
+- **dev**: New features and some bug fixes are merged here. This branch allows collective testing, conflict resolution, and further stabilization before merging into the stable branch.
+- **main**: Stable branch where PIP releases are created.
+
+By default, branches target **main**, but most contributions should target **dev**. 
+
+**Exceptions**:
+Direct merges to **main** are allowed if:
+
+- `yfinance` is massively broken
+- Part of `yfinance` is broken, and the fix is simple and isolated
+- Not updating the code (e.g. docs)
+
+Creating your branch
+--------------------
+
+1. Fork the repository on GitHub. If already forked, remember to ``Sync fork``
+
+2. Clone your forked repository:
+
+   .. code-block:: bash
+
+      git clone https://github.com/{user}/{repo}.git
+
+3. Create a new branch for your feature or bug fix, from appropriate base branch:
+
+   .. code-block:: bash
+
+      git checkout {base e.g. dev}
+      git pull
+      git checkout -b {your branch}
+
+4. Make your changes, commit them, and push your branch to GitHub. To keep the commit history and `network graph <https://github.com/ranaroussi/yfinance/network>`_ compact, give your commits a very short summary then description:
+
+   .. code-block:: bash
+
+      git commit -m "short sentence summary" -m "full commit message"
+      # Long message can be multiple lines (tip: copy-paste)
+
+6. `Open a pull request on Github <https://github.com/ranaroussi/yfinance/pulls>`_.
+
+Running a branch
+----------------
+
+Please see `this page </development/running>`_.
+
+Git stuff
+---------
+
+- You might be asked to move your branch from ``main`` to ``dev``. This is a ``git rebase``. Remember to update **all** branches involved.
+
+  .. code-block:: bash
+
+     # update all branches:
+     git checkout main
+     git pull
+     git checkout dev
+     git pull
+     # rebase from main to dev:
+     git checkout {your branch}
+     git pull
+     git rebase --onto dev main {your branch}
+     git push --force-with-lease origin {your branch}
+
+- ``git rebase`` can also be used to update your branch with new commits from base, but without adding a commit to your branch history like git merge does. This keeps history clean and avoids future merge problems.
+
+  .. code-block:: bash
+
+     git checkout {base branch e.g. dev}
+     git pull
+     git checkout {your branch}
+     git rebase {base}
+     git push --force-with-lease origin {your branch}
+
+- ``git squash`` tiny or negligible commits with meaningful ones, or to combine successive related commits. `git squash guide <https://docs.gitlab.com/ee/topics/git/git_rebase.html#interactive-rebase>`_
+
+  .. code-block:: bash
+
+     git rebase -i HEAD~2
+     git push --force-with-lease origin {your branch}

doc/source/development/contributing.rst

@@ -1,61 +0,0 @@
-********************************
-Contributing to yfinance
-********************************
-
-`yfinance` relies on the community to investigate bugs and contribute code. Here's how you can help:
-
-Contributing
-------------
-
-1. Fork the repository on GitHub. If already forked, remember to `Sync fork`
-2. Clone your forked repository:
-
-   .. code-block:: bash
-
-      git clone https://github.com/{user}/{repo}.git
-
-3. Create a new branch for your feature or bug fix:
-
-   .. code-block:: bash
-
-      git checkout -b {branch}
-
-4. Make your changes, commit them, and push your branch to GitHub. To keep the commit history and `network graph <https://github.com/ranaroussi/yfinance/network>`_ compact:
-
-   Use short summaries for commits
-
-   .. code-block:: bash
-
-      git commit -m "short summary" -m "full commit message"
-
-   **Squash** tiny or negligible commits with meaningful ones.
-
-   .. code-block:: bash
-
-      git rebase -i HEAD~2
-      git push --force-with-lease origin {branch}
-
-5. Open a pull request on the `yfinance` `Github <https://github.com/ranaroussi/yfinance/pulls>`_ page.
-
-Git stuff
----------
-
-To keep the Git commit history and [network graph](https://github.com/ranaroussi/yfinance/network) compact please follow these two rules:
-
-- For long commit messages use this: `git commit -m "short sentence summary" -m "full commit message"`
-
-- `squash` tiny/negligible commits back with meaningful commits, or to combine successive related commits. [Guide](https://docs.gitlab.com/ee/topics/git/git_rebase.html#interactive-rebase) but basically it's:
-
-.. code-block:: bash
-   git rebase -i HEAD~2
-   git push --force-with-lease origin {branch}
-
-
-### rebase
- 
-You might be asked to move your branch from `main` to `dev`. Make sure you have pulled **all** relevant branches then run:
-
-.. code-block:: bash
-   git checkout {branch}
-   git rebase --onto dev main {brach}
-   git push --force-with-lease origin {branch}

doc/source/development/documentation.rst

@@ -1,6 +1,6 @@
-*************************************
-Contribution to the documentation
-*************************************
+*************
+Documentation
+*************
 
 .. contents:: Documentation:
    :local:
@@ -36,15 +36,18 @@ To build the documentation locally, follow these steps:
 
 3. **View Documentation Locally**:
 
-   ..code-block:: bash
+   .. code-block:: bash
+
       python -m http.server -d ./doc/_build/html
 
    Then open "localhost:8000" in browser
 
 
-Building documentation on main
-------------------------------
-The documentation updates are built on merge to ``main`` branch. This is done via GitHub Actions workflow based on ``/yfinance/.github/workflows/deploy_doc.yml``.
+Publishing documentation
+------------------------
+
+Merge into ``main`` branch triggers auto-generating documentation by action ``.github/workflows/deploy_doc.yml``.
+This publishes the generated HTML into branch ``documentation``.
 
 1. Review the changes locally and push to ``dev``.
 

doc/source/development/index.rst

@@ -2,12 +2,12 @@
 Development
 ===========
 
+yfinance relies on the community to investigate bugs and contribute code. Here's how you can help:
+
 .. toctree::
    :maxdepth: 1
 
-   contributing
+   code
+   running
    documentation
-   reporting_bug
-   branches
-   testing
-   running
+   testing

doc/source/development/reporting_bug.rst

@@ -1,5 +0,0 @@
-********************************
-Reporting a Bug
-********************************
-
-Open a new issue on our `GitHub <https://github.com/ranaroussi/yfinance/issues>`_.

doc/source/development/running.rst

@@ -5,12 +5,14 @@ With PIP
 --------
 
 .. code-block:: bash
-    pip install git+https://github.com/{user}/{repo}.git@{branch}
+
+   pip install git+https://github.com/{user}/{repo}.git@{branch}
 
 E.g.:
 
 .. code-block:: bash
-    pip install git+https://github.com/ranaroussi/yfinance.git@feature/name
+
+   pip install git+https://github.com/ranaroussi/yfinance.git@feature/name
 
 With Git
 --------

meta.yaml

@@ -1,5 +1,5 @@
 {% set name = "yfinance" %}
-{% set version = "0.2.58" %}
+{% set version = "0.2.63" %}
 
 package:
   name: "{{ name|lower }}"

requirements.txt

@@ -11,5 +11,5 @@ requests_cache>=1.0
 requests_ratelimiter>=0.3.1
 scipy>=1.6.3
 curl_cffi>=0.7
-protobuf>=5.29.0,<6
-websockets>=11.0
+protobuf>=3.19.0
+websockets>=13.0

setup.py

@@ -64,7 +64,7 @@ setup(
                       'platformdirs>=2.0.0', 'pytz>=2022.5',
                       'frozendict>=2.3.4', 'peewee>=3.16.2',
                       'beautifulsoup4>=4.11.1', 'curl_cffi>=0.7',
-                      'protobuf>=5.29.0,<6', 'websockets>=11.0'],
+                      'protobuf>=3.19.0', 'websockets>=13.0'],
     extras_require={
         'nospam': ['requests_cache>=1.0', 'requests_ratelimiter>=0.3.1'],
         'repair': ['scipy>=1.6.3'],

tests/context.py

@@ -5,8 +5,8 @@ import datetime as _dt
 import sys
 import os
 import yfinance
-from requests_ratelimiter import LimiterSession
-from pyrate_limiter import Duration, RequestRate, Limiter
+# from requests_ratelimiter import LimiterSession
+# from pyrate_limiter import Duration, RequestRate, Limiter
 
 _parent_dp = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
 _src_dp = _parent_dp
@@ -25,12 +25,15 @@ if os.path.isdir(testing_cache_dirpath):
         import shutil
         shutil.rmtree(testing_cache_dirpath)
 
-# Setup a session to only rate-limit
-history_rate = RequestRate(1, Duration.SECOND)
-limiter = Limiter(history_rate)
-session_gbl = LimiterSession(limiter=limiter)
+# Since switching to curl_cffi, the requests_ratelimiter|cache won't work.
+session_gbl = None
 
-# Use this instead if you also want caching:
+# # Setup a session to only rate-limit
+# history_rate = RequestRate(1, Duration.SECOND)
+# limiter = Limiter(history_rate)
+# session_gbl = LimiterSession(limiter=limiter)
+
+# # Use this instead if you also want caching:
 # from requests_cache import CacheMixin, SQLiteCache
 # from requests_ratelimiter import LimiterMixin
 # from requests import Session

tests/test_ticker.py

@@ -18,9 +18,9 @@ from yfinance.exceptions import YFPricesMissingError, YFInvalidPeriodError, YFNo
 
 
 import unittest
-import requests_cache
+# import requests_cache
 from typing import Union, Any, get_args, _GenericAlias
-from urllib.parse import urlparse, parse_qs, urlencode, urlunparse
+# from urllib.parse import urlparse, parse_qs, urlencode, urlunparse
 
 ticker_attributes = (
     ("major_holders", pd.DataFrame),
@@ -284,36 +284,37 @@ class TestTickerHistory(unittest.TestCase):
                         else:
                             self.assertIsInstance(data.columns, pd.MultiIndex)
 
-    def test_no_expensive_calls_introduced(self):
-        """
-        Make sure calling history to get price data has not introduced more calls to yahoo than absolutely necessary.
-        As doing other type of scraping calls than "query2.finance.yahoo.com/v8/finance/chart" to yahoo website
-        will quickly trigger spam-block when doing bulk download of history data.
-        """
-        symbol = "GOOGL"
-        period = "1y"
-        with requests_cache.CachedSession(backend="memory") as session:
-            ticker = yf.Ticker(symbol, session=session)
-            ticker.history(period=period)
-            actual_urls_called = [r.url for r in session.cache.filter()]
+    # Hopefully one day we find an equivalent "requests_cache" that works with "curl_cffi"
+    # def test_no_expensive_calls_introduced(self):
+    #     """
+    #     Make sure calling history to get price data has not introduced more calls to yahoo than absolutely necessary.
+    #     As doing other type of scraping calls than "query2.finance.yahoo.com/v8/finance/chart" to yahoo website
+    #     will quickly trigger spam-block when doing bulk download of history data.
+    #     """
+    #     symbol = "GOOGL"
+    #     period = "1y"
+    #     with requests_cache.CachedSession(backend="memory") as session:
+    #         ticker = yf.Ticker(symbol, session=session)
+    #         ticker.history(period=period)
+    #         actual_urls_called = [r.url for r in session.cache.filter()]
 
-        # Remove 'crumb' argument
-        for i in range(len(actual_urls_called)):
-            u = actual_urls_called[i]
-            parsed_url = urlparse(u)
-            query_params = parse_qs(parsed_url.query)
-            query_params.pop('crumb', None)
-            query_params.pop('cookie', None)
-            u = urlunparse(parsed_url._replace(query=urlencode(query_params, doseq=True)))
-            actual_urls_called[i] = u
-        actual_urls_called = tuple(actual_urls_called)
+    #     # Remove 'crumb' argument
+    #     for i in range(len(actual_urls_called)):
+    #         u = actual_urls_called[i]
+    #         parsed_url = urlparse(u)
+    #         query_params = parse_qs(parsed_url.query)
+    #         query_params.pop('crumb', None)
+    #         query_params.pop('cookie', None)
+    #         u = urlunparse(parsed_url._replace(query=urlencode(query_params, doseq=True)))
+    #         actual_urls_called[i] = u
+    #     actual_urls_called = tuple(actual_urls_called)
 
-        expected_urls = [
-            f"https://query2.finance.yahoo.com/v8/finance/chart/{symbol}?interval=1d&range=1d",  # ticker's tz
-            f"https://query2.finance.yahoo.com/v8/finance/chart/{symbol}?events=div%2Csplits%2CcapitalGains&includePrePost=False&interval=1d&range={period}"
-        ]
-        for url in actual_urls_called:
-            self.assertTrue(url in expected_urls, f"Unexpected URL called: {url}")
+    #     expected_urls = [
+    #         f"https://query2.finance.yahoo.com/v8/finance/chart/{symbol}?interval=1d&range=1d",  # ticker's tz
+    #         f"https://query2.finance.yahoo.com/v8/finance/chart/{symbol}?events=div%2Csplits%2CcapitalGains&includePrePost=False&interval=1d&range={period}"
+    #     ]
+    #     for url in actual_urls_called:
+    #         self.assertTrue(url in expected_urls, f"Unexpected URL called: {url}")
 
     def test_dividends(self):
         data = self.ticker.dividends
@@ -889,8 +890,6 @@ class TestTickerAnalysts(unittest.TestCase):
         data = self.ticker.upgrades_downgrades
         self.assertIsInstance(data, pd.DataFrame, "data has wrong type")
         self.assertFalse(data.empty, "data is empty")
-        self.assertTrue(len(data.columns) == 4, "data has wrong number of columns")
-        self.assertCountEqual(data.columns.values.tolist(), ['Firm', 'ToGrade', 'FromGrade', 'Action'], "data has wrong column names")
         self.assertIsInstance(data.index, pd.DatetimeIndex, "data has wrong index type")
 
         data_cached = self.ticker.upgrades_downgrades
@@ -1000,7 +999,6 @@ class TestTickerInfo(unittest.TestCase):
         self.assertIsInstance(data, dict, "data has wrong type")
         expected_keys = ['industry', 'currentPrice', 'exchange', 'floatShares', 'companyOfficers', 'bid']
         for k in expected_keys:
-            print(k)
             self.assertIn("symbol", data.keys(), f"Did not find expected key '{k}' in info dict")
         self.assertEqual(self.symbols[0], data["symbol"], "Wrong symbol value in info dict")
 

yfinance/base.py

@@ -66,17 +66,22 @@ class TickerBase:
         if self.ticker == "":
             raise ValueError("Empty ticker name")
 
+        self._data: YfData = YfData(session=session)
+        if proxy is not _SENTINEL_:
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
+            self._data._set_proxy(proxy)
+
         # accept isin as ticker
         if utils.is_isin(self.ticker):
             isin = self.ticker
-            self.ticker = utils.get_ticker_by_isin(self.ticker, None, session)
+            c = cache.get_isin_cache()
+            self.ticker = c.lookup(isin)
+            if not self.ticker:
+                self.ticker = utils.get_ticker_by_isin(isin)
             if self.ticker == "":
                 raise ValueError(f"Invalid ISIN number: {isin}")
-
-        self._data: YfData = YfData(session=session)
-        if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
-            self._data._set_proxy(proxy)
+            if self.ticker:
+                c.store(isin, self.ticker)
 
         # self._price_history = PriceHistory(self._data, self.ticker)
         self._price_history = None  # lazy-load
@@ -176,7 +181,7 @@ class TickerBase:
         Columns: period  strongBuy  buy  hold  sell  strongSell
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._quote.recommendations
@@ -186,7 +191,7 @@ class TickerBase:
 
     def get_recommendations_summary(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         return self.get_recommendations(as_dict=as_dict)
@@ -198,7 +203,7 @@ class TickerBase:
         Columns: firm toGrade fromGrade action
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._quote.upgrades_downgrades
@@ -208,21 +213,21 @@ class TickerBase:
 
     def get_calendar(self, proxy=_SENTINEL_) -> dict:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         return self._quote.calendar
 
     def get_sec_filings(self, proxy=_SENTINEL_) -> dict:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         return self._quote.sec_filings
 
     def get_major_holders(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._holders.major
@@ -232,7 +237,7 @@ class TickerBase:
 
     def get_institutional_holders(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._holders.institutional
@@ -243,7 +248,7 @@ class TickerBase:
 
     def get_mutualfund_holders(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._holders.mutualfund
@@ -254,7 +259,7 @@ class TickerBase:
 
     def get_insider_purchases(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._holders.insider_purchases
@@ -265,7 +270,7 @@ class TickerBase:
 
     def get_insider_transactions(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._holders.insider_transactions
@@ -276,7 +281,7 @@ class TickerBase:
 
     def get_insider_roster_holders(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._holders.insider_roster
@@ -287,7 +292,7 @@ class TickerBase:
 
     def get_info(self, proxy=_SENTINEL_) -> dict:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._quote.info
@@ -295,21 +300,16 @@ class TickerBase:
 
     def get_fast_info(self, proxy=_SENTINEL_):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         if self._fast_info is None:
             self._fast_info = FastInfo(self)
         return self._fast_info
 
-    @property
-    def basic_info(self):
-        warnings.warn("'Ticker.basic_info' is deprecated and will be removed in future, Switch to 'Ticker.fast_info'", DeprecationWarning)
-        return self.fast_info
-
     def get_sustainability(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._quote.sustainability
@@ -319,7 +319,7 @@ class TickerBase:
 
     def get_analyst_price_targets(self, proxy=_SENTINEL_) -> dict:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         """
@@ -330,7 +330,7 @@ class TickerBase:
 
     def get_earnings_estimate(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         """
@@ -342,7 +342,7 @@ class TickerBase:
 
     def get_revenue_estimate(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         """
@@ -354,7 +354,7 @@ class TickerBase:
 
     def get_earnings_history(self, proxy=_SENTINEL_, as_dict=False):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         """
@@ -370,7 +370,7 @@ class TickerBase:
         Columns:    current  7daysAgo  30daysAgo  60daysAgo  90daysAgo
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._analysis.eps_trend
@@ -382,7 +382,7 @@ class TickerBase:
         Columns:    upLast7days  upLast30days  downLast7days  downLast30days
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._analysis.eps_revisions
@@ -394,7 +394,7 @@ class TickerBase:
         Columns:    stock  industry  sector  index
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._analysis.growth_estimates
@@ -411,7 +411,7 @@ class TickerBase:
                 Default is "yearly"
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         if self._fundamentals.earnings is None:
@@ -438,7 +438,7 @@ class TickerBase:
                 Default is "yearly"
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._fundamentals.financials.get_income_time_series(freq=freq)
@@ -452,14 +452,14 @@ class TickerBase:
 
     def get_incomestmt(self, proxy=_SENTINEL_, as_dict=False, pretty=False, freq="yearly"):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         return self.get_income_stmt(proxy, as_dict, pretty, freq)
 
     def get_financials(self, proxy=_SENTINEL_, as_dict=False, pretty=False, freq="yearly"):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         return self.get_income_stmt(proxy, as_dict, pretty, freq)
@@ -478,7 +478,7 @@ class TickerBase:
                 Default is "yearly"
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
 
@@ -493,7 +493,7 @@ class TickerBase:
 
     def get_balancesheet(self, proxy=_SENTINEL_, as_dict=False, pretty=False, freq="yearly"):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         return self.get_balance_sheet(proxy, as_dict, pretty, freq)
@@ -512,7 +512,7 @@ class TickerBase:
                 Default is "yearly"
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
 
@@ -527,37 +527,37 @@ class TickerBase:
 
     def get_cashflow(self, proxy=_SENTINEL_, as_dict=False, pretty=False, freq="yearly"):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
         return self.get_cash_flow(proxy, as_dict, pretty, freq)
 
     def get_dividends(self, proxy=_SENTINEL_, period="max") -> pd.Series:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
         return self._lazy_load_price_history().get_dividends(period=period)
 
     def get_capital_gains(self, proxy=_SENTINEL_, period="max") -> pd.Series:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
         return self._lazy_load_price_history().get_capital_gains(period=period)
 
     def get_splits(self, proxy=_SENTINEL_, period="max") -> pd.Series:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
         return self._lazy_load_price_history().get_splits(period=period)
 
     def get_actions(self, proxy=_SENTINEL_, period="max") -> pd.Series:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
         return self._lazy_load_price_history().get_actions(period=period)
 
     def get_shares(self, proxy=_SENTINEL_, as_dict=False) -> Union[pd.DataFrame, dict]:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         data = self._fundamentals.shares
@@ -570,7 +570,7 @@ class TickerBase:
         logger = utils.get_yf_logger()
 
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         # Process dates
@@ -624,7 +624,7 @@ class TickerBase:
 
     def get_isin(self, proxy=_SENTINEL_) -> Optional[str]:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         # *** experimental ***
@@ -670,7 +670,7 @@ class TickerBase:
         logger = utils.get_yf_logger()
 
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         tab_queryrefs = {
@@ -722,7 +722,7 @@ class TickerBase:
         logger = utils.get_yf_logger()
 
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         clamped_limit = min(limit, 100)  # YF caps at 100, don't go higher
@@ -783,14 +783,14 @@ class TickerBase:
 
     def get_history_metadata(self, proxy=_SENTINEL_) -> dict:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         return self._lazy_load_price_history().get_history_metadata(proxy)
 
     def get_funds_data(self, proxy=_SENTINEL_) -> Optional[FundsData]:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         if not self._funds_data:

yfinance/cache.py

@@ -3,13 +3,15 @@ from threading import Lock
 import os as _os
 import platformdirs as _ad
 import atexit as _atexit
-import datetime as _datetime
+import datetime as _dt
 import pickle as _pkl
 
 from .utils import get_yf_logger
 
 _cache_init_lock = Lock()
 
+
+
 # --------------
 # TimeZone cache
 # --------------
@@ -105,7 +107,7 @@ _atexit.register(_TzDBManager.close_db)
 
 
 tz_db_proxy = _peewee.Proxy()
-class _KV(_peewee.Model):
+class _TZ_KV(_peewee.Model):
     key = _peewee.CharField(primary_key=True)
     value = _peewee.CharField(null=True)
     
@@ -146,11 +148,11 @@ class _TzCache:
         db.connect()
         tz_db_proxy.initialize(db)
         try:
-            db.create_tables([_KV])
+            db.create_tables([_TZ_KV])
         except _peewee.OperationalError as e:
             if 'WITHOUT' in str(e):
-                _KV._meta.without_rowid = False
-                db.create_tables([_KV])
+                _TZ_KV._meta.without_rowid = False
+                db.create_tables([_TZ_KV])
             else:
                 raise
         self.initialised = 1  # success
@@ -166,8 +168,8 @@ class _TzCache:
             return None
 
         try:
-            return _KV.get(_KV.key == key).value
-        except _KV.DoesNotExist:
+            return _TZ_KV.get(_TZ_KV.key == key).value
+        except _TZ_KV.DoesNotExist:
             return None
 
     def store(self, key, value):
@@ -185,18 +187,18 @@ class _TzCache:
             return
         try:
             if value is None:
-                q = _KV.delete().where(_KV.key == key)
+                q = _TZ_KV.delete().where(_TZ_KV.key == key)
                 q.execute()
                 return
             with db.atomic():
-                _KV.insert(key=key, value=value).execute()
+                _TZ_KV.insert(key=key, value=value).execute()
         except _peewee.IntegrityError:
             # Integrity error means the key already exists. Try updating the key.
             old_value = self.lookup(key)
             if old_value != value:
                 get_yf_logger().debug(f"Value for key {key} changed from {old_value} to {value}.")
                 with db.atomic():
-                    q = _KV.update(value=value).where(_KV.key == key)
+                    q = _TZ_KV.update(value=value).where(_TZ_KV.key == key)
                     q.execute()
 
 
@@ -301,16 +303,16 @@ class ISODateTimeField(_peewee.DateTimeField):
     # because user discovered peewee allowed an invalid datetime
     # to get written.
     def db_value(self, value):
-        if value and isinstance(value, _datetime.datetime):
+        if value and isinstance(value, _dt.datetime):
             return value.isoformat()
         return super().db_value(value)
     def python_value(self, value):
         if value and isinstance(value, str) and 'T' in value:
-            return _datetime.datetime.fromisoformat(value)
+            return _dt.datetime.fromisoformat(value)
         return super().python_value(value)
 class _CookieSchema(_peewee.Model):
     strategy = _peewee.CharField(primary_key=True)
-    fetch_date = ISODateTimeField(default=_datetime.datetime.now)
+    fetch_date = ISODateTimeField(default=_dt.datetime.now)
     
     # Which cookie type depends on strategy
     cookie_bytes = _peewee.BlobField()
@@ -374,7 +376,7 @@ class _CookieCache:
         try:
             data =  _CookieSchema.get(_CookieSchema.strategy == strategy)
             cookie = _pkl.loads(data.cookie_bytes)
-            return {'cookie':cookie, 'age':_datetime.datetime.now()-data.fetch_date}
+            return {'cookie':cookie, 'age':_dt.datetime.now()-data.fetch_date}
         except _CookieSchema.DoesNotExist:
             return None
 
@@ -415,6 +417,211 @@ def get_cookie_cache():
 
 
 
+# --------------
+# ISIN cache
+# --------------
+
+class _ISINCacheException(Exception):
+    pass
+
+
+class _ISINCacheDummy:
+    """Dummy cache to use if isin cache is disabled"""
+
+    def lookup(self, isin):
+        return None
+
+    def store(self, isin, tkr):
+        pass
+
+    @property
+    def tz_db(self):
+        return None
+
+
+class _ISINCacheManager:
+    _isin_cache = None
+
+    @classmethod
+    def get_isin_cache(cls):
+        if cls._isin_cache is None:
+            with _cache_init_lock:
+                cls._initialise()
+        return cls._isin_cache
+
+    @classmethod
+    def _initialise(cls, cache_dir=None):
+        cls._isin_cache = _ISINCache()
+
+
+class _ISINDBManager:
+    _db = None
+    _cache_dir = _os.path.join(_ad.user_cache_dir(), "py-yfinance")
+
+    @classmethod
+    def get_database(cls):
+        if cls._db is None:
+            cls._initialise()
+        return cls._db
+
+    @classmethod
+    def close_db(cls):
+        if cls._db is not None:
+            try:
+                cls._db.close()
+            except Exception:
+                # Must discard exceptions because Python trying to quit.
+                pass
+
+
+    @classmethod
+    def _initialise(cls, cache_dir=None):
+        if cache_dir is not None:
+            cls._cache_dir = cache_dir
+
+        if not _os.path.isdir(cls._cache_dir):
+            try:
+                _os.makedirs(cls._cache_dir)
+            except OSError as err:
+                raise _ISINCacheException(f"Error creating ISINCache folder: '{cls._cache_dir}' reason: {err}")
+        elif not (_os.access(cls._cache_dir, _os.R_OK) and _os.access(cls._cache_dir, _os.W_OK)):
+            raise _ISINCacheException(f"Cannot read and write in ISINCache folder: '{cls._cache_dir}'")
+
+        cls._db = _peewee.SqliteDatabase(
+            _os.path.join(cls._cache_dir, 'isin-tkr.db'),
+            pragmas={'journal_mode': 'wal', 'cache_size': -64}
+        )
+
+    @classmethod
+    def set_location(cls, new_cache_dir):
+        if cls._db is not None:
+            cls._db.close()
+            cls._db = None
+        cls._cache_dir = new_cache_dir
+
+    @classmethod
+    def get_location(cls):
+        return cls._cache_dir
+
+# close DB when Python exists
+_atexit.register(_ISINDBManager.close_db)
+
+
+isin_db_proxy = _peewee.Proxy()
+class _ISIN_KV(_peewee.Model):
+    key = _peewee.CharField(primary_key=True)
+    value = _peewee.CharField(null=True)
+    created_at = _peewee.DateTimeField(default=_dt.datetime.now)
+    
+    class Meta:
+        database = isin_db_proxy
+        without_rowid = True
+
+
+class _ISINCache:
+    def __init__(self):
+        self.initialised = -1
+        self.db = None
+        self.dummy = False
+
+    def get_db(self):
+        if self.db is not None:
+            return self.db
+
+        try:
+            self.db = _ISINDBManager.get_database()
+        except _ISINCacheException as err:
+            get_yf_logger().info(f"Failed to create ISINCache, reason: {err}. "
+                                 "ISINCache will not be used. "
+                                 "Tip: You can direct cache to use a different location with 'set_isin_cache_location(mylocation)'")
+            self.dummy = True
+            return None
+        return self.db
+
+    def initialise(self):
+        if self.initialised != -1:
+            return
+
+        db = self.get_db()
+        if db is None:
+            self.initialised = 0  # failure
+            return
+
+        db.connect()
+        isin_db_proxy.initialize(db)
+        try:
+            db.create_tables([_ISIN_KV])
+        except _peewee.OperationalError as e:
+            if 'WITHOUT' in str(e):
+                _ISIN_KV._meta.without_rowid = False
+                db.create_tables([_ISIN_KV])
+            else:
+                raise
+        self.initialised = 1  # success
+
+    def lookup(self, key):
+        if self.dummy:
+            return None
+
+        if self.initialised == -1:
+            self.initialise()
+
+        if self.initialised == 0:  # failure
+            return None
+
+        try:
+            return _ISIN_KV.get(_ISIN_KV.key == key).value
+        except _ISIN_KV.DoesNotExist:
+            return None
+
+    def store(self, key, value):
+        if self.dummy:
+            return
+
+        if self.initialised == -1:
+            self.initialise()
+
+        if self.initialised == 0:  # failure
+            return
+
+        db = self.get_db()
+        if db is None:
+            return
+        try:
+            if value is None:
+                q = _ISIN_KV.delete().where(_ISIN_KV.key == key)
+                q.execute()
+                return
+
+            # Remove existing rows with same value that are older than 1 week
+            one_week_ago = _dt.datetime.now() - _dt.timedelta(weeks=1)
+            old_rows_query = _ISIN_KV.delete().where(
+                (_ISIN_KV.value == value) & 
+                (_ISIN_KV.created_at < one_week_ago)
+            )
+            old_rows_query.execute()
+
+            with db.atomic():
+                _ISIN_KV.insert(key=key, value=value).execute()
+
+        except _peewee.IntegrityError:
+            # Integrity error means the key already exists. Try updating the key.
+            old_value = self.lookup(key)
+            if old_value != value:
+                get_yf_logger().debug(f"Value for key {key} changed from {old_value} to {value}.")
+                with db.atomic():
+                    q = _ISIN_KV.update(value=value, created_at=_dt.datetime.now()).where(_ISIN_KV.key == key)
+                    q.execute()
+
+
+def get_isin_cache():
+    return _ISINCacheManager.get_isin_cache()
+
+
+# --------------
+# Utils
+# --------------
+
 def set_cache_location(cache_dir: str):
     """
     Sets the path to create the "py-yfinance" cache folder in.
@@ -425,6 +632,7 @@ def set_cache_location(cache_dir: str):
     """
     _TzDBManager.set_location(cache_dir)
     _CookieDBManager.set_location(cache_dir)
+    _ISINDBManager.set_location(cache_dir)
 
 def set_tz_cache_location(cache_dir: str):
     set_cache_location(cache_dir)

yfinance/data.py

@@ -10,7 +10,7 @@ from frozendict import frozendict
 from . import utils, cache
 import threading
 
-from .exceptions import YFRateLimitError
+from .exceptions import YFRateLimitError, YFDataException
 
 cache_maxsize = 64
 
@@ -83,13 +83,9 @@ class YfData(metaclass=SingletonMeta):
     def _set_session(self, session):
         if session is None:
             return
-        with self._cookie_lock:
-            self._session = session
-            if self._proxy is not None:
-                self._session.proxies = self._proxy
 
         try:
-            self._session.cache
+            session.cache
         except AttributeError:
             # Not caching
             self._session_is_caching = False
@@ -98,8 +94,16 @@ class YfData(metaclass=SingletonMeta):
             # Can't simply use a non-caching session to fetch cookie & crumb,
             # because then the caching-session won't have cookie.
             self._session_is_caching = True
-            from requests_cache import DO_NOT_CACHE
-            self._expire_after = DO_NOT_CACHE
+            # But since switch to curl_cffi, can't use requests_cache with it.
+            raise YFDataException("request_cache sessions don't work with curl_cffi, which is necessary now for Yahoo API. Solution: stop setting session, let YF handle.")
+
+        if not isinstance(session, requests.session.Session):
+            raise YFDataException(f"Yahoo API requires curl_cffi session not {type(session)}. Solution: stop setting session, let YF handle.")
+
+        with self._cookie_lock:
+            self._session = session
+            if self._proxy is not None:
+                self._session.proxies = self._proxy
 
     def _set_proxy(self, proxy=None):
         with self._cookie_lock:
@@ -133,53 +137,80 @@ class YfData(metaclass=SingletonMeta):
         if not have_lock:
             self._cookie_lock.release()
 
-    def _save_session_cookies(self):
-        try:
-            cache.get_cookie_cache().store('csrf', self._session.cookies)
-        except Exception:
+    @utils.log_indent_decorator
+    def _save_cookie_curlCffi(self):
+        if self._session is None:
             return False
+        cookies = self._session.cookies.jar._cookies
+        if len(cookies) == 0:
+            return False
+        yh_domains = [k for k in cookies.keys() if 'yahoo' in k]
+        if len(yh_domains) > 1:
+            # Possible when cookie fetched with CSRF method. Discard consent cookie.
+            yh_domains = [k for k in yh_domains if 'consent' not in k]
+        if len(yh_domains) > 1:
+            utils.get_yf_logger().debug(f'Multiple Yahoo cookies, not sure which to cache: {yh_domains}')
+            return False
+        if len(yh_domains) == 0:
+            return False
+        yh_domain = yh_domains[0]
+        yh_cookie = {yh_domain: cookies[yh_domain]}
+        cache.get_cookie_cache().store('curlCffi', yh_cookie)
         return True
 
-    def _load_session_cookies(self):
-        cookie_dict = cache.get_cookie_cache().lookup('csrf')
-        if cookie_dict is None:
+    @utils.log_indent_decorator
+    def _load_cookie_curlCffi(self):
+        if self._session is None:
             return False
-        # Periodically refresh, 24 hours seems fair.
-        if cookie_dict['age'] > datetime.timedelta(days=1):
+        cookie_dict = cache.get_cookie_cache().lookup('curlCffi')
+        if cookie_dict is None or len(cookie_dict) == 0:
             return False
-        self._session.cookies.update(cookie_dict['cookie'])
-        utils.get_yf_logger().debug('loaded persistent cookie')
-
-    def _save_cookie_basic(self, cookie):
-        try:
-            cache.get_cookie_cache().store('basic', cookie)
-        except Exception:
+        cookies = cookie_dict['cookie']
+        domain = list(cookies.keys())[0]
+        cookie = cookies[domain]['/']['A3']
+        expiry_ts = cookie.expires
+        if expiry_ts > 2e9:
+            # convert ms to s
+            expiry_ts //= 1e3
+        expiry_dt = datetime.datetime.fromtimestamp(expiry_ts, tz=datetime.timezone.utc)
+        expired = expiry_dt < datetime.datetime.now(datetime.timezone.utc)
+        if expired:
+            utils.get_yf_logger().debug('cached cookie expired')
             return False
+        self._session.cookies.jar._cookies.update(cookies)
+        self._cookie = cookie
         return True
-    def _load_cookie_basic(self):
-        cookie_dict = cache.get_cookie_cache().lookup('basic')
-        if cookie_dict is None:
-            return None
-        # Periodically refresh, 24 hours seems fair.
-        if cookie_dict['age'] > datetime.timedelta(days=1):
-            return None
-        utils.get_yf_logger().debug('loaded persistent cookie')
-        return cookie_dict['cookie']
 
+    @utils.log_indent_decorator
     def _get_cookie_basic(self, timeout=30):
+        if self._cookie is not None:
+            utils.get_yf_logger().debug('reusing cookie')
+            return True
+        elif self._load_cookie_curlCffi():
+            utils.get_yf_logger().debug('reusing persistent cookie')
+            return True
+
         # To avoid infinite recursion, do NOT use self.get()
         # - 'allow_redirects' copied from @psychoz971 solution - does it help USA?
-        self._session.get(
-            url='https://fc.yahoo.com',
-            timeout=timeout,
-            allow_redirects=True)
+        try:
+            self._session.get(
+                url='https://fc.yahoo.com',
+                timeout=timeout,
+                allow_redirects=True)
+        except requests.exceptions.DNSError:
+            # Possible because url on some privacy/ad blocklists
+            return False
+        self._save_cookie_curlCffi()
+        return True
 
+    @utils.log_indent_decorator
     def _get_crumb_basic(self, timeout=30):
         if self._crumb is not None:
             utils.get_yf_logger().debug('reusing crumb')
             return self._crumb
 
-        self._get_cookie_basic()        
+        if not self._get_cookie_basic():
+            return None
         # - 'allow_redirects' copied from @psychoz971 solution - does it help USA?
         get_args = {
             'url': "https://query1.finance.yahoo.com/v1/test/getcrumb",
@@ -192,6 +223,10 @@ class YfData(metaclass=SingletonMeta):
         else:
             crumb_response = self._session.get(**get_args)
         self._crumb = crumb_response.text
+        if crumb_response.status_code == 429 or "Too Many Requests" in self._crumb:
+            utils.get_yf_logger().debug(f"Didn't receive crumb {self._crumb}")
+            raise YFRateLimitError()
+
         if self._crumb is None or '<html>' in self._crumb:
             utils.get_yf_logger().debug("Didn't receive crumb")
             return None
@@ -201,16 +236,17 @@ class YfData(metaclass=SingletonMeta):
 
     @utils.log_indent_decorator
     def _get_cookie_and_crumb_basic(self, timeout):
-        self._get_cookie_basic(timeout)
-        crumb = self._get_crumb_basic(timeout)
-        return crumb
+        if not self._get_cookie_basic(timeout):
+            return None
+        return self._get_crumb_basic(timeout)
 
+    @utils.log_indent_decorator
     def _get_cookie_csrf(self, timeout):
         if self._cookie is not None:
             utils.get_yf_logger().debug('reusing cookie')
             return True
 
-        elif self._load_session_cookies():
+        elif self._load_cookie_curlCffi():
             utils.get_yf_logger().debug('reusing persistent cookie')
             self._cookie = True
             return True
@@ -270,7 +306,7 @@ class YfData(metaclass=SingletonMeta):
             # No idea why happens, but handle nicely so can switch to other cookie method.
             utils.get_yf_logger().debug('_get_cookie_csrf() encountering requests.exceptions.ChunkedEncodingError, aborting')
         self._cookie = True
-        self._save_session_cookies()
+        self._save_cookie_curlCffi()
         return True
 
     @utils.log_indent_decorator
@@ -295,6 +331,10 @@ class YfData(metaclass=SingletonMeta):
             r = self._session.get(**get_args)
         self._crumb = r.text
 
+        if r.status_code == 429 or "Too Many Requests" in self._crumb:
+            utils.get_yf_logger().debug(f"Didn't receive crumb {self._crumb}")
+            raise YFRateLimitError()
+
         if self._crumb is None or '<html>' in self._crumb or self._crumb == '':
             utils.get_yf_logger().debug("Didn't receive crumb")
             return None
@@ -328,11 +368,11 @@ class YfData(metaclass=SingletonMeta):
     @utils.log_indent_decorator
     def get(self, url, params=None, timeout=30):
         return self._make_request(url, request_method = self._session.get, params=params, timeout=timeout)
-    
+
     @utils.log_indent_decorator
     def post(self, url, body, params=None, timeout=30):
         return self._make_request(url, request_method = self._session.post, body=body, params=params, timeout=timeout)
-    
+
     @utils.log_indent_decorator
     def _make_request(self, url, request_method, body=None, params=None, timeout=30):
         # Important: treat input arguments as immutable.
@@ -362,7 +402,7 @@ class YfData(metaclass=SingletonMeta):
 
         if body:
             request_args['json'] = body
-            
+
         response = request_method(**request_args)
         utils.get_yf_logger().debug(f'response code={response.status_code}')
         if response.status_code >= 400:
@@ -391,4 +431,4 @@ class YfData(metaclass=SingletonMeta):
         utils.get_yf_logger().debug(f'get_raw_json(): {url}')
         response = self.get(url, params=params, timeout=timeout)
         response.raise_for_status()
-        return response.json()
+        return response.json()

yfinance/domain/domain.py

@@ -1,10 +1,11 @@
 from abc import ABC, abstractmethod
-from ..ticker import Ticker
+import pandas as _pd
+from typing import Dict, List, Optional
+import warnings
+
 from ..const import _QUERY1_URL_, _SENTINEL_
 from ..data import YfData
-from ..utils import print_once
-from typing import Dict, List, Optional
-import pandas as _pd
+from ..ticker import Ticker
 
 _QUERY_URL_ = f'{_QUERY1_URL_}/v1/finance'
 
@@ -26,7 +27,7 @@ class Domain(ABC):
         self.session = session
         self._data: YfData = YfData(session=session)
         if proxy is not _SENTINEL_:
-            print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         self._name: Optional[str] = None

yfinance/domain/industry.py

@@ -1,12 +1,14 @@
 from __future__ import print_function
-from typing import Dict, Optional
 
 import pandas as _pd
+from typing import Dict, Optional
+import warnings
+
+from .. import utils
+from ..const import _SENTINEL_
+from ..data import YfData
 
 from .domain import Domain, _QUERY_URL_
-from .. import utils
-from ..data import YfData
-from ..const import _SENTINEL_
 
 class Industry(Domain):
     """
@@ -20,8 +22,9 @@ class Industry(Domain):
             session (optional): The session to use for requests.
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
-            YfData(session=session, proxy=proxy)
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
+            YfData(proxy=proxy)
+        YfData(session=session)
         super(Industry, self).__init__(key, session)
         self._query_url = f'{_QUERY_URL_}/industries/{self._key}'
 

yfinance/domain/market.py

@@ -1,9 +1,9 @@
 import datetime as dt
-
-from ..data import YfData
-from ..data import utils
-from ..const import _QUERY1_URL_, _SENTINEL_
 import json as _json
+import warnings
+
+from ..const import _QUERY1_URL_, _SENTINEL_
+from ..data import utils, YfData
 
 class Market:
     def __init__(self, market:'str', session=None, proxy=_SENTINEL_, timeout=30):
@@ -13,7 +13,7 @@ class Market:
 
         self._data = YfData(session=self.session)
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         self._logger = utils.get_yf_logger()

yfinance/domain/sector.py

@@ -1,13 +1,14 @@
 from __future__ import print_function
-from typing import Dict, Optional
-from ..utils import dynamic_docstring, generate_list_table_from_dict
-from ..const import SECTOR_INDUSTY_MAPPING, _SENTINEL_
 
 import pandas as _pd
+from typing import Dict, Optional
+import warnings
+
+from ..const import SECTOR_INDUSTY_MAPPING, _SENTINEL_
+from ..data import YfData
+from ..utils import dynamic_docstring, generate_list_table_from_dict, get_yf_logger
 
 from .domain import Domain, _QUERY_URL_
-from .. import utils
-from ..data import YfData
 
 class Sector(Domain):
     """
@@ -28,7 +29,7 @@ class Sector(Domain):
                 Map of sector and industry
         """
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             YfData(session=session, proxy=proxy)
 
         super(Sector, self).__init__(key, session)
@@ -147,7 +148,7 @@ class Sector(Domain):
             self._industries = self._parse_industries(data.get('industries', {}))
 
         except Exception as e:
-            logger = utils.get_yf_logger()
+            logger = get_yf_logger()
             logger.error(f"Failed to get sector data for '{self._key}' reason: {e}")
             logger.debug("Got response: ")
             logger.debug("-------------")

yfinance/live.py

@@ -1,7 +1,7 @@
 import asyncio
 import base64
 import json
-from typing import List, Optional, Callable
+from typing import List, Optional, Callable, Union
 
 from websockets.sync.client import connect as sync_connect
 from websockets.asyncio.client import connect as async_connect
@@ -84,12 +84,12 @@ class AsyncWebSocket(BaseWebSocket):
                     print(f"Error in heartbeat subscription: {e}")
                 break
 
-    async def subscribe(self, symbols: str | List[str]):
+    async def subscribe(self, symbols: Union[str, List[str]]):
         """
         Subscribe to a stock symbol or a list of stock symbols.
 
         Args:
-            symbols (str | List[str]): Stock symbol(s) to subscribe to.
+            symbols (Union[str, List[str]]): Stock symbol(s) to subscribe to.
         """
         await self._connect()
 
@@ -109,12 +109,12 @@ class AsyncWebSocket(BaseWebSocket):
         if self.verbose:
             print(f"Subscribed to symbols: {symbols}")
 
-    async def unsubscribe(self, symbols: str | List[str]):
+    async def unsubscribe(self, symbols: Union[str, List[str]]):
         """
         Unsubscribe from a stock symbol or a list of stock symbols.
 
         Args:
-            symbols (str | List[str]): Stock symbol(s) to unsubscribe from.
+            symbols (Union[str, List[str]]): Stock symbol(s) to unsubscribe from.
         """
         await self._connect()
 
@@ -235,12 +235,12 @@ class WebSocket(BaseWebSocket):
             self._ws = None
             raise
 
-    def subscribe(self, symbols: str | List[str]):
+    def subscribe(self, symbols: Union[str, List[str]]):
         """
         Subscribe to a stock symbol or a list of stock symbols.
 
         Args:
-            symbols (str | List[str]): Stock symbol(s) to subscribe to.
+            symbols (Union[str, List[str]]): Stock symbol(s) to subscribe to.
         """
         self._connect()
 
@@ -256,12 +256,12 @@ class WebSocket(BaseWebSocket):
         if self.verbose:
             print(f"Subscribed to symbols: {symbols}")
 
-    def unsubscribe(self, symbols: str | List[str]):
+    def unsubscribe(self, symbols: Union[str, List[str]]):
         """
         Unsubscribe from a stock symbol or a list of stock symbols.
 
         Args:
-            symbols (str | List[str]): Stock symbol(s) to unsubscribe from.
+            symbols (Union[str, List[str]]): Stock symbol(s) to unsubscribe from.
         """
         self._connect()
 

yfinance/lookup.py

@@ -20,8 +20,8 @@
 #
 
 import json as _json
-
 import pandas as pd
+import warnings
 
 from . import utils
 from .const import _QUERY1_URL_, _SENTINEL_
@@ -43,12 +43,12 @@ class Lookup:
     :param raise_errors: Raise exceptions on error (default True).
     """
 
-    def __init__(self, query: str, session=None, proxy=None, timeout=30, raise_errors=True):
+    def __init__(self, query: str, session=None, proxy=_SENTINEL_, timeout=30, raise_errors=True):
         self.session = session
         self._data = YfData(session=self.session)
 
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         self.query = query

yfinance/multi.py

@@ -25,6 +25,7 @@ import logging
 import time as _time
 import traceback
 from typing import Union
+import warnings
 
 import multitasking as _multitasking
 import pandas as _pd
@@ -93,9 +94,15 @@ def download(tickers, start=None, end=None, actions=False, threads=True,
     logger = utils.get_yf_logger()
     session = session or requests.Session(impersonate="chrome")
 
+    # Ensure data initialised with session.
+    if proxy is not _SENTINEL_:
+        warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=3)
+        YfData(proxy=proxy)
+    YfData(session=session)
+
     if auto_adjust is None:
         # Warn users that default has changed to True
-        utils.print_once("YF.download() has changed argument auto_adjust default to True")
+        warnings.warn("YF.download() has changed argument auto_adjust default to True", FutureWarning, stacklevel=3)
         auto_adjust = True
 
     if logger.isEnabledFor(logging.DEBUG):
@@ -127,7 +134,7 @@ def download(tickers, start=None, end=None, actions=False, threads=True,
     for ticker in tickers:
         if utils.is_isin(ticker):
             isin = ticker
-            ticker = utils.get_ticker_by_isin(ticker, session=session)
+            ticker = utils.get_ticker_by_isin(ticker)
             shared._ISINS[ticker] = isin
         _tickers_.append(ticker)
 
@@ -143,13 +150,6 @@ def download(tickers, start=None, end=None, actions=False, threads=True,
     shared._ERRORS = {}
     shared._TRACEBACKS = {}
 
-    # Ensure data initialised with session.
-    if proxy is not _SENTINEL_:
-        utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
-        YfData(session=session, proxy=proxy)
-    else:
-        YfData(session=session)
-
     # download using threads
     if threads:
         if threads is True:

yfinance/pricing_pb2.py

@@ -1,22 +1,12 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
-# NO CHECKED-IN PROTOBUF GENCODE
-# source: yfinance/pricing.proto
-# Protobuf Python Version: 5.29.0
+# source: pricing.proto
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
-from google.protobuf import runtime_version as _runtime_version
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
 from google.protobuf import symbol_database as _symbol_database
-from google.protobuf.internal import builder as _builder
-_runtime_version.ValidateProtobufRuntimeVersion(
-    _runtime_version.Domain.PUBLIC,
-    5,
-    29,
-    0,
-    '',
-    'yfinance/pricing.proto'
-)
 # @@protoc_insertion_point(imports)
 
 _sym_db = _symbol_database.Default()
@@ -24,13 +14,20 @@ _sym_db = _symbol_database.Default()
 
 
 
-DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\x16yfinance/pricing.proto\"\x9a\x05\n\x0bPricingData\x12\n\n\x02id\x18\x01 \x01(\t\x12\r\n\x05price\x18\x02 \x01(\x02\x12\x0c\n\x04time\x18\x03 \x01(\x12\x12\x10\n\x08\x63urrency\x18\x04 \x01(\t\x12\x10\n\x08\x65xchange\x18\x05 \x01(\t\x12\x12\n\nquote_type\x18\x06 \x01(\x05\x12\x14\n\x0cmarket_hours\x18\x07 \x01(\x05\x12\x16\n\x0e\x63hange_percent\x18\x08 \x01(\x02\x12\x12\n\nday_volume\x18\t \x01(\x12\x12\x10\n\x08\x64\x61y_high\x18\n \x01(\x02\x12\x0f\n\x07\x64\x61y_low\x18\x0b \x01(\x02\x12\x0e\n\x06\x63hange\x18\x0c \x01(\x02\x12\x12\n\nshort_name\x18\r \x01(\t\x12\x13\n\x0b\x65xpire_date\x18\x0e \x01(\x12\x12\x12\n\nopen_price\x18\x0f \x01(\x02\x12\x16\n\x0eprevious_close\x18\x10 \x01(\x02\x12\x14\n\x0cstrike_price\x18\x11 \x01(\x02\x12\x19\n\x11underlying_symbol\x18\x12 \x01(\t\x12\x15\n\ropen_interest\x18\x13 \x01(\x12\x12\x14\n\x0coptions_type\x18\x14 \x01(\x12\x12\x13\n\x0bmini_option\x18\x15 \x01(\x12\x12\x11\n\tlast_size\x18\x16 \x01(\x12\x12\x0b\n\x03\x62id\x18\x17 \x01(\x02\x12\x10\n\x08\x62id_size\x18\x18 \x01(\x12\x12\x0b\n\x03\x61sk\x18\x19 \x01(\x02\x12\x10\n\x08\x61sk_size\x18\x1a \x01(\x12\x12\x12\n\nprice_hint\x18\x1b \x01(\x12\x12\x10\n\x08vol_24hr\x18\x1c \x01(\x12\x12\x1a\n\x12vol_all_currencies\x18\x1d \x01(\x12\x12\x15\n\rfrom_currency\x18\x1e \x01(\t\x12\x13\n\x0blast_market\x18\x1f \x01(\t\x12\x1a\n\x12\x63irculating_supply\x18  \x01(\x01\x12\x12\n\nmarket_cap\x18! \x01(\x01\x62\x06proto3')
+DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\rpricing.proto\"\x9a\x05\n\x0bPricingData\x12\n\n\x02id\x18\x01 \x01(\t\x12\r\n\x05price\x18\x02 \x01(\x02\x12\x0c\n\x04time\x18\x03 \x01(\x12\x12\x10\n\x08\x63urrency\x18\x04 \x01(\t\x12\x10\n\x08\x65xchange\x18\x05 \x01(\t\x12\x12\n\nquote_type\x18\x06 \x01(\x05\x12\x14\n\x0cmarket_hours\x18\x07 \x01(\x05\x12\x16\n\x0e\x63hange_percent\x18\x08 \x01(\x02\x12\x12\n\nday_volume\x18\t \x01(\x12\x12\x10\n\x08\x64\x61y_high\x18\n \x01(\x02\x12\x0f\n\x07\x64\x61y_low\x18\x0b \x01(\x02\x12\x0e\n\x06\x63hange\x18\x0c \x01(\x02\x12\x12\n\nshort_name\x18\r \x01(\t\x12\x13\n\x0b\x65xpire_date\x18\x0e \x01(\x12\x12\x12\n\nopen_price\x18\x0f \x01(\x02\x12\x16\n\x0eprevious_close\x18\x10 \x01(\x02\x12\x14\n\x0cstrike_price\x18\x11 \x01(\x02\x12\x19\n\x11underlying_symbol\x18\x12 \x01(\t\x12\x15\n\ropen_interest\x18\x13 \x01(\x12\x12\x14\n\x0coptions_type\x18\x14 \x01(\x12\x12\x13\n\x0bmini_option\x18\x15 \x01(\x12\x12\x11\n\tlast_size\x18\x16 \x01(\x12\x12\x0b\n\x03\x62id\x18\x17 \x01(\x02\x12\x10\n\x08\x62id_size\x18\x18 \x01(\x12\x12\x0b\n\x03\x61sk\x18\x19 \x01(\x02\x12\x10\n\x08\x61sk_size\x18\x1a \x01(\x12\x12\x12\n\nprice_hint\x18\x1b \x01(\x12\x12\x10\n\x08vol_24hr\x18\x1c \x01(\x12\x12\x1a\n\x12vol_all_currencies\x18\x1d \x01(\x12\x12\x15\n\rfrom_currency\x18\x1e \x01(\t\x12\x13\n\x0blast_market\x18\x1f \x01(\t\x12\x1a\n\x12\x63irculating_supply\x18  \x01(\x01\x12\x12\n\nmarket_cap\x18! \x01(\x01\x62\x06proto3')
+
+
+
+_PRICINGDATA = DESCRIPTOR.message_types_by_name['PricingData']
+PricingData = _reflection.GeneratedProtocolMessageType('PricingData', (_message.Message,), {
+  'DESCRIPTOR' : _PRICINGDATA,
+  '__module__' : 'pricing_pb2'
+  # @@protoc_insertion_point(class_scope:PricingData)
+  })
+_sym_db.RegisterMessage(PricingData)
 
-_globals = globals()
-_builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
-_builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'yfinance.pricing_pb2', _globals)
 if not _descriptor._USE_C_DESCRIPTORS:
-  DESCRIPTOR._loaded_options = None
-  _globals['_PRICINGDATA']._serialized_start=27
-  _globals['_PRICINGDATA']._serialized_end=693
+  DESCRIPTOR._options = None
+  _PRICINGDATA._serialized_start=18
+  _PRICINGDATA._serialized_end=684
 # @@protoc_insertion_point(module_scope)

yfinance/scrapers/analysis.py

@@ -1,17 +1,18 @@
+import curl_cffi
 import pandas as pd
-import requests
+import warnings
 
 from yfinance import utils
-from yfinance.data import YfData
 from yfinance.const import quote_summary_valid_modules, _SENTINEL_
-from yfinance.scrapers.quote import _QUOTE_SUMMARY_URL_
+from yfinance.data import YfData
 from yfinance.exceptions import YFException
+from yfinance.scrapers.quote import _QUOTE_SUMMARY_URL_
 
 class Analysis:
 
     def __init__(self, data: YfData, symbol: str, proxy=_SENTINEL_):
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             data._set_proxy(proxy)
 
         self._data = data
@@ -178,7 +179,7 @@ class Analysis:
         params_dict = {"modules": modules, "corsDomain": "finance.yahoo.com", "formatted": "false", "symbol": self._symbol}
         try:
             result = self._data.get_raw_json(_QUOTE_SUMMARY_URL_ + f"/{self._symbol}", params=params_dict)
-        except requests.exceptions.HTTPError as e:
+        except curl_cffi.requests.exceptions.HTTPError as e:
             utils.get_yf_logger().error(str(e))
             return None
         return result

yfinance/scrapers/fundamentals.py

@@ -12,7 +12,7 @@ class Fundamentals:
 
     def __init__(self, data: YfData, symbol: str, proxy=const._SENTINEL_):
         if proxy is not const._SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             data._set_proxy(proxy)
 
         self._data = data
@@ -53,7 +53,7 @@ class Financials:
 
     def get_income_time_series(self, freq="yearly", proxy=const._SENTINEL_) -> pd.DataFrame:
         if proxy is not const._SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         res = self._income_time_series
@@ -63,7 +63,7 @@ class Financials:
 
     def get_balance_sheet_time_series(self, freq="yearly", proxy=const._SENTINEL_) -> pd.DataFrame:
         if proxy is not const._SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         res = self._balance_sheet_time_series
@@ -73,7 +73,7 @@ class Financials:
 
     def get_cash_flow_time_series(self, freq="yearly", proxy=const._SENTINEL_) -> pd.DataFrame:
         if proxy is not const._SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         res = self._cash_flow_time_series

yfinance/scrapers/funds.py

@@ -1,11 +1,11 @@
 import pandas as pd
-
-from yfinance.data import YfData
-from yfinance.const import _BASE_URL_, _SENTINEL_
-from yfinance.exceptions import YFDataException
-from yfinance import utils
-
 from typing import Dict, Optional
+import warnings
+
+from yfinance import utils
+from yfinance.const import _BASE_URL_, _SENTINEL_
+from yfinance.data import YfData
+from yfinance.exceptions import YFDataException
 
 _QUOTE_SUMMARY_URL_ = f"{_BASE_URL_}/v10/finance/quoteSummary/"
 
@@ -26,7 +26,7 @@ class FundsData:
         self._data = data
         self._symbol = symbol
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
         
         # quoteType

yfinance/scrapers/history.py

@@ -1,12 +1,13 @@
+from curl_cffi import requests
+from math import isclose
+import bisect
 import datetime as _datetime
 import dateutil as _dateutil
 import logging
 import numpy as np
 import pandas as pd
-from math import isclose
 import time as _time
-import bisect
-from curl_cffi import requests
+import warnings
 
 from yfinance import shared, utils
 from yfinance.const import _BASE_URL_, _PRICE_COLNAMES_, _SENTINEL_
@@ -18,7 +19,7 @@ class PriceHistory:
         self.ticker = ticker.upper()
         self.tz = tz
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=5)
             self._data._set_proxy(proxy)
         self.session = session or requests.Session(impersonate="chrome")
 
@@ -77,7 +78,7 @@ class PriceHistory:
         logger = utils.get_yf_logger()
 
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=5)
             self._data._set_proxy(proxy)
 
         interval_user = interval
@@ -133,13 +134,14 @@ class PriceHistory:
                 end = utils._parse_user_dt(end, tz)
             if start is None:
                 if interval == "1m":
-                    start = end - 604800   # 7 days
-                elif interval in ("5m", "15m", "30m", "90m"):
+                    start = end - 691200  # 8 days
+                elif interval in ("2m", "5m", "15m", "30m", "90m"):
                     start = end - 5184000  # 60 days
-                elif interval in ("1h", '60m'):
+                elif interval in ("1h", "60m"):
                     start = end - 63072000  # 730 days
                 else:
                     start = end - 3122064000  # 99 years
+                start += 5 # allow for processing time
             else:
                 start = utils._parse_user_dt(start, tz)
             params = {"period1": start, "period2": end}
@@ -481,7 +483,7 @@ class PriceHistory:
 
     def get_history_metadata(self, proxy=_SENTINEL_) -> dict:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=3)
             self._data._set_proxy(proxy)
 
         if self._history_metadata is None or 'tradingPeriods' not in self._history_metadata:
@@ -496,7 +498,7 @@ class PriceHistory:
 
     def get_dividends(self, period="max", proxy=_SENTINEL_) -> pd.Series:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=3)
             self._data._set_proxy(proxy)
 
         df = self._get_history_cache(period=period)
@@ -507,7 +509,7 @@ class PriceHistory:
 
     def get_capital_gains(self, period="max", proxy=_SENTINEL_) -> pd.Series:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=3)
             self._data._set_proxy(proxy)
 
         df = self._get_history_cache(period=period)
@@ -518,7 +520,7 @@ class PriceHistory:
 
     def get_splits(self, period="max", proxy=_SENTINEL_) -> pd.Series:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=3)
             self._data._set_proxy(proxy)
 
         df = self._get_history_cache(period=period)
@@ -529,7 +531,7 @@ class PriceHistory:
 
     def get_actions(self, period="max", proxy=_SENTINEL_) -> pd.Series:
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=3)
             self._data._set_proxy(proxy)
 
         df = self._get_history_cache(period=period)

yfinance/scrapers/holders.py

@@ -1,9 +1,10 @@
+import curl_cffi
 import pandas as pd
-import requests
+import warnings
 
 from yfinance import utils
-from yfinance.data import YfData
 from yfinance.const import _BASE_URL_, _SENTINEL_
+from yfinance.data import YfData
 from yfinance.exceptions import YFDataException
 
 _QUOTE_SUMMARY_URL_ = f"{_BASE_URL_}/v10/finance/quoteSummary"
@@ -15,7 +16,7 @@ class Holders:
         self._data = data
         self._symbol = symbol
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             data._set_proxy(proxy)
 
         self._major = None
@@ -73,7 +74,7 @@ class Holders:
     def _fetch_and_parse(self):
         try:
             result = self._fetch()
-        except requests.exceptions.HTTPError as e:
+        except curl_cffi.requests.exceptions.HTTPError as e:
             utils.get_yf_logger().error(str(e))
 
             self._major = pd.DataFrame()

yfinance/scrapers/quote.py

@@ -1,13 +1,13 @@
+import curl_cffi
 import datetime
 import json
-
 import numpy as _np
 import pandas as pd
-import requests
+import warnings
 
 from yfinance import utils
-from yfinance.data import YfData
 from yfinance.const import quote_summary_valid_modules, _BASE_URL_, _QUERY1_URL_, _SENTINEL_
+from yfinance.data import YfData
 from yfinance.exceptions import YFDataException, YFException
 
 info_retired_keys_price = {"currentPrice", "dayHigh", "dayLow", "open", "previousClose", "volume", "volume24Hr"}
@@ -29,7 +29,7 @@ class FastInfo:
     def __init__(self, tickerBaseObject, proxy=_SENTINEL_):
         self._tkr = tickerBaseObject
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._tkr._data._set_proxy(proxy)
 
         self._prices_1y = None
@@ -490,7 +490,7 @@ class Quote:
         self._data = data
         self._symbol = symbol
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         self._info = None
@@ -588,7 +588,7 @@ class Quote:
         params_dict = {"modules": modules, "corsDomain": "finance.yahoo.com", "formatted": "false", "symbol": self._symbol}
         try:
             result = self._data.get_raw_json(_QUOTE_SUMMARY_URL_ + f"/{self._symbol}", params=params_dict)
-        except requests.exceptions.HTTPError as e:
+        except curl_cffi.requests.exceptions.HTTPError as e:
             utils.get_yf_logger().error(str(e))
             return None
         return result
@@ -597,7 +597,7 @@ class Quote:
         params_dict = {"symbols": self._symbol, "formatted": "false"}
         try:
             result = self._data.get_raw_json(f"{_QUERY1_URL_}/v7/finance/quote?", params=params_dict)
-        except requests.exceptions.HTTPError as e:
+        except curl_cffi.requests.exceptions.HTTPError as e:
             utils.get_yf_logger().error(str(e))
             return None
         return result

yfinance/screener/screener.py

@@ -1,14 +1,14 @@
-from .query import EquityQuery as EqyQy
-from .query import FundQuery as FndQy
-from .query import QueryBase, EquityQuery, FundQuery
+import curl_cffi
+from typing import Union
+import warnings
 
 from yfinance.const import _QUERY1_URL_, _SENTINEL_
 from yfinance.data import YfData
+from ..utils import dynamic_docstring, generate_list_table_from_dict_universal
 
-from ..utils import dynamic_docstring, generate_list_table_from_dict_universal, print_once
-
-from typing import Union
-import requests
+from .query import EquityQuery as EqyQy
+from .query import FundQuery as FndQy
+from .query import QueryBase, EquityQuery, FundQuery
 
 _SCREENER_URL_ = f"{_QUERY1_URL_}/v1/finance/screener"
 _PREDEFINED_URL_ = f"{_SCREENER_URL_}/predefined/saved"
@@ -112,7 +112,7 @@ def screen(query: Union[str, EquityQuery, FundQuery],
     """
 
     if proxy is not _SENTINEL_:
-        print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+        warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
         _data = YfData(session=session, proxy=proxy)
     else:
         _data = YfData(session=session)
@@ -135,6 +135,18 @@ def screen(query: Union[str, EquityQuery, FundQuery],
     if size is not None and size > 250:
         raise ValueError("Yahoo limits query size to 250, reduce size.")
 
+    if offset is not None and isinstance(query, str):
+        # offset ignored by predefined API so switch to other API
+        post_query = PREDEFINED_SCREENER_QUERIES[query]
+        query = post_query['query']
+        # use predefined's attributes if user not specified
+        if sortField is None:
+            sortField = post_query['sortField']
+        if sortAsc is None:
+            sortAsc = post_query['sortType'].lower() == 'asc'
+        # and don't use defaults
+        defaults = {}
+
     fields = {'offset': offset, 'count': count, "size": size, 'sortField': sortField, 'sortAsc': sortAsc, 'userId': userId, 'userIdType': userIdType}
 
     params_dict = {"corsDomain": "finance.yahoo.com", "formatted": "false", "lang": "en-US", "region": "US"}
@@ -145,7 +157,7 @@ def screen(query: Union[str, EquityQuery, FundQuery],
         # Switch to Yahoo's predefined endpoint
 
         if size is not None:
-            print_once("YF deprecation warning: 'size' argument is deprecated for predefined screens, set 'count' instead.")
+            warnings.warn("Screen 'size' argument is deprecated for predefined screens, set 'count' instead.", DeprecationWarning, stacklevel=2)
             count = size
             size = None
             fields['count'] = fields['size']
@@ -158,7 +170,7 @@ def screen(query: Union[str, EquityQuery, FundQuery],
         resp = _data.get(url=_PREDEFINED_URL_, params=params_dict)
         try:
             resp.raise_for_status()
-        except requests.exceptions.HTTPError:
+        except curl_cffi.requests.exceptions.HTTPError:
             if query not in PREDEFINED_SCREENER_QUERIES:
                 print(f"yfinance.screen: '{query}' is probably not a predefined query.")
             raise

yfinance/search.py

@@ -20,6 +20,7 @@
 #
 
 import json as _json
+import warnings
 
 from . import utils
 from .const import _BASE_URL_, _SENTINEL_
@@ -52,7 +53,7 @@ class Search:
         self._data = YfData(session=self.session)
         
         if proxy is not _SENTINEL_:
-            utils.print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
 
         self.query = query

yfinance/ticker.py

@@ -22,17 +22,21 @@
 from __future__ import print_function
 
 from collections import namedtuple as _namedtuple
-from .scrapers.funds import FundsData
+import warnings
 
 import pandas as _pd
 
 from .base import TickerBase
 from .const import _BASE_URL_, _SENTINEL_
+from .scrapers.funds import FundsData
 
 
 class Ticker(TickerBase):
     def __init__(self, ticker, session=None, proxy=_SENTINEL_):
-        super(Ticker, self).__init__(ticker, session=session, proxy=proxy)
+        if proxy is not _SENTINEL_:
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
+            self._data._set_proxy(proxy)
+        super(Ticker, self).__init__(ticker, session=session)
         self._expirations = {}
         self._underlying  = {}
 

yfinance/tickers.py

@@ -21,9 +21,10 @@
 
 from __future__ import print_function
 
+import warnings
+
 from . import Ticker, multi
 from .live import WebSocket
-from .utils import print_once
 from .data import YfData
 from .const import _SENTINEL_
 
@@ -56,8 +57,9 @@ class Tickers:
                 timeout=10, **kwargs):
 
         if proxy is not _SENTINEL_:
-            print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
+            proxy = _SENTINEL_
 
         return self.download(
             period, interval,
@@ -75,8 +77,9 @@ class Tickers:
                  timeout=10, **kwargs):
 
         if proxy is not _SENTINEL_:
-            print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
+            warnings.warn("Set proxy via new config function: yf.set_config(proxy=proxy)", DeprecationWarning, stacklevel=2)
             self._data._set_proxy(proxy)
+            proxy = _SENTINEL_
 
         data = multi.download(self.symbols,
                               start=start, end=end,

yfinance/utils.py

@@ -27,7 +27,7 @@ import re
 import re as _re
 import sys as _sys
 import threading
-from functools import lru_cache, wraps
+from functools import wraps
 from inspect import getmembers
 from types import FunctionType
 from typing import List, Optional
@@ -50,13 +50,6 @@ def attributes(obj):
         if name[0] != '_' and name not in disallowed_names and hasattr(obj, name)}
 
 
-@lru_cache(maxsize=20)
-def print_once(msg):
-    # 'warnings' module suppression of repeat messages does not work.
-    # This function replicates correct behaviour
-    print(msg)
-
-
 # Logging
 # Note: most of this logic is adding indentation with function depth,
 #       so that DEBUG log is readable.
@@ -181,18 +174,14 @@ def is_isin(string):
     return bool(_re.match("^([A-Z]{2})([A-Z0-9]{9})([0-9])$", string))
 
 
-def get_all_by_isin(isin, proxy=const._SENTINEL_, session=None):
+def get_all_by_isin(isin):
     if not (is_isin(isin)):
         raise ValueError("Invalid ISIN number")
 
-    if proxy is not const._SENTINEL_:
-        print_once("YF deprecation warning: set proxy via new config function: yf.set_config(proxy=proxy)")
-        proxy = None
-
     # Deferred this to prevent circular imports
     from .search import Search
 
-    search = Search(query=isin, max_results=1, session=session, proxy=proxy)
+    search = Search(query=isin, max_results=1)
 
     # Extract the first quote and news
     ticker = search.quotes[0] if search.quotes else {}
@@ -210,18 +199,18 @@ def get_all_by_isin(isin, proxy=const._SENTINEL_, session=None):
     }
 
 
-def get_ticker_by_isin(isin, proxy=const._SENTINEL_, session=None):
-    data = get_all_by_isin(isin, proxy, session)
+def get_ticker_by_isin(isin):
+    data = get_all_by_isin(isin)
     return data.get('ticker', {}).get('symbol', '')
 
 
-def get_info_by_isin(isin, proxy=const._SENTINEL_, session=None):
-    data = get_all_by_isin(isin, proxy, session)
+def get_info_by_isin(isin):
+    data = get_all_by_isin(isin)
     return data.get('ticker', {})
 
 
-def get_news_by_isin(isin, proxy=const._SENTINEL_, session=None):
-    data = get_all_by_isin(isin, proxy, session)
+def get_news_by_isin(isin):
+    data = get_all_by_isin(isin)
     return data.get('news', {})
 
 

yfinance/version.py

@@ -1 +1 @@
-version = "0.2.58"
+version = "0.2.63"