def put(self, item, block=True, timeout=None):
# Behaves the same way as default except that instead of raising Full,
# it just pushes the item on to the deque anyway, throwing away old
# frames.
self.not_full.acquire()
try:
if self.maxsize > 0 and block:
if 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 = Queue._time() + timeout
while self._qsize() == self.maxsize:
remaining = endtime - Queue._time()
if remaining <= 0.0:
break
self.not_full.wait(remaining)
self._put(item)
self.unfinished_tasks += 1
self.not_empty.notify()
finally:
self.not_full.release()
