Queue.empty() Return True if the queue is empty, False otherwise. If empty() returns True

_thread.exit() Raise the

imap(func, iterable[, chunksize]) A lazier version of

check_returncode() If returncode is non-zero, raise a CalledProcessError.

class concurrent.futures.Future Encapsulates the asynchronous execution of a callable. Future instances are created

cancel_join_thread() Prevent join_thread() from blocking. In particular, this prevents the background thread from

Popen.kill() Kills the child. On Posix OSs the function sends SIGKILL to the child. On Windows kill() is an alias

multiprocessing.get_start_method(allow_none=False) Return the name of start method used for starting processes.

class multiprocessing.Barrier(parties[, action[, timeout]]) A barrier object: a clone of

Source code: Lib/dummy_threading