class sched.scheduler(timefunc=time.monotonic, delayfunc=time.sleep) The scheduler class defines a generic interface

_thread.allocate_lock() Return a new lock object. Methods of locks are described below. The lock is initially unlocked.

multiprocessing.connection.Client(address[, family[, authenticate[, authkey]]]) Attempt to set up a connection to the listener

_getvalue() Return a copy of the referent. If the referent is unpicklable then this will raise

timeout Timeout in seconds.

multiprocessing.sharedctypes.Array(typecode_or_type, size_or_initializer, *, lock=True) The same as RawArray()

is_alive() Return whether the process is alive. Roughly, a process object is alive from the

Popen.returncode The child return code, set by poll() and wait() (and indirectly by communicate())

class concurrent.futures.ProcessPoolExecutor(max_workers=None) An Executor subclass that executes calls asynchronously

release() Release a semaphore, incrementing the internal counter by one. When it was zero on entry and another thread is waiting