feat: prioritize handling commands

common/dequeue.py

@@ -0,0 +1,33 @@
+
+from queue import Full, Queue
+from time import monotonic as time
+
+# add implementation of putleft to Queue
+class Dequeue(Queue):
+    def putleft(self, item, block=True, timeout=None):
+        with self.not_full:
+            if self.maxsize > 0:
+                if not block:
+                    if self._qsize() >= self.maxsize:
+                        raise Full
+                elif timeout is None:
+                    while self._qsize() >= self.maxsize:
+                        self.not_full.wait()
+                elif timeout < 0:
+                    raise ValueError("'timeout' must be a non-negative number")
+                else:
+                    endtime = time() + timeout
+                    while self._qsize() >= self.maxsize:
+                        remaining = endtime - time()
+                        if remaining <= 0.0:
+                            raise Full
+                        self.not_full.wait(remaining)
+            self._putleft(item)
+            self.unfinished_tasks += 1
+            self.not_empty.notify()
+
+    def put_nowait(self, item):
+        return self.put(item, block=False)
+
+    def _putleft(self, item):
+        self.queue.appendleft(item)