exception concurrent.futures.CancelledError Raised when a future is cancelled.

Queue.qsize() Return the approximate size of the queue. Note, qsize() > 0 doesn’t guarantee that a subsequent get() will

apply_async(func[, args[, kwds[, callback[, error_callback]]]]) A variant of the apply() method which returns a

join([timeout]) If the optional argument timeout is None (the default), the method blocks until the process

ident The ‘thread identifier’ of this thread or None if the thread has not been started. This is a nonzero integer

__repr__() Return a representation of the proxy object.

parties The number of threads required to pass the barrier.

Popen.wait(timeout=None) Wait for child process to terminate. Set and return returncode attribute.

multiprocessing.set_executable() Sets the path of the Python interpreter to use when starting a child process. (By default

notify(n=1) By default, wake up one thread waiting on this condition, if any. If the calling thread has not acquired the lock