subprocess.check_call(args, *, stdin=None, stdout=None, stderr=None, shell=False, timeout=None) Run command with arguments.

exception threading.BrokenBarrierError This exception, a subclass of

exception queue.Empty Exception raised when non-blocking get() (or get_nowait()) is called on a Queue

stdout Alias for output, for symmetry with stderr.

shutdown(wait=True) Signal the executor that it should free any resources that it is using when the currently pending futures

multiprocessing.get_logger() Returns the logger used by multiprocessing. If necessary, a new one will be created

threading.enumerate() Return a list of all Thread objects currently alive. The list includes daemonic threads,

class threading.BoundedSemaphore(value=1) Class implementing bounded semaphore objects. A bounded semaphore checks to make sure

multiprocessing.sharedctypes.synchronized(obj[, lock]) Return a process-safe wrapper object for a ctypes object which uses lock

set_result(result) Sets the result of the work associated with the Future to result.