class multiprocessing.Semaphore([value]) A semaphore object: a close analog of

returncode Exit status of the child process. If the process exited due to a signal, this will be the negative signal number

Popen.poll() Check if child process has terminated. Set and return returncode attribute.

class multiprocessing.managers.Namespace A type that can register with SyncManager. A

put(obj[, block[, timeout]]) Put obj into the queue. If the optional argument block is True (the default)

start() Start the process’s activity. This must be called at most once per process object. It

subprocess.check_output(args, *, stdin=None, stderr=None, shell=False, universal_newlines=False, timeout=None) Run command with

Popen.stdin If the stdin argument was PIPE, this attribute is a writeable stream object as returned by

Queue.put_nowait(item) Equivalent to put(item, False).

release() Release a lock, decrementing the recursion level. If after the decrement it is zero, reset the lock to unlocked (not