os.fork() Fork a child process. Return 0 in the child and the child’s process id in the parent. If an error occurs OSError is raised. Note that some platforms including FreeBSD <= 6.3 and Cygwin have known issues when using fork() from a thread. Warning See ssl for applications that use the SSL module with fork(). Availability: Unix.

class unittest.mock.NonCallableMagicMock(*args, **kw) A non-callable version of MagicMock. The constructor parameters have the same meaning as for MagicMock, with the exception of return_value and side_effect which have no meaning on a non-callable mock.

parents Property returning a new ChainMap containing all of the maps in the current instance except the first one. This is useful for skipping the first map in the search. Use cases are similar to those for the nonlocal keyword used in nested scopes. The use cases also parallel those for the built-in super() function. A reference to d.parents is equivalent to: ChainMap(*d.maps[1:]).

os.spawnvpe(mode, file, args, env) Execute the program path in a new process. (Note that the subprocess module provides more powerful facilities for spawning new processes and retrieving their results; using that module is preferable to using these functions. Check especially the Replacing Older Functions with the subprocess Module section.) If mode is P_NOWAIT, this function returns the process id of the new process; if mode is P_WAIT, returns the process’s exit code if it exits normally, o

same_quantum(x, y) Returns True if the two operands have the same exponent.

site.addsitedir(sitedir, known_paths=None) Add a directory to sys.path and process its .pth files. Typically used in sitecustomize or usercustomize (see above).

class multiprocessing.pool.Pool([processes[, initializer[, initargs[, maxtasksperchild[, context]]]]]) A process pool object which controls a pool of worker processes to which jobs can be submitted. It supports asynchronous results with timeouts and callbacks and has a parallel map implementation. processes is the number of worker processes to use. If processes is None then the number returned by os.cpu_count() is used. If initializer is not None then each worker process will call initialize

marshal.loads(string) Convert the string to a value. If no valid value is found, raise EOFError, ValueError or TypeError. Extra characters in the string are ignored.

readable() Called each time around the asynchronous loop to determine whether a channel’s socket should be added to the list on which read events can occur. The default method simply returns True, indicating that by default, all channels will be interested in read events.

Repr.maxtuple Repr.maxset Repr.maxfrozenset Repr.maxdeque Repr.maxarray Limits on the number of entries represented for the named object type. The default is 4 for maxdict, 5 for maxarray, and 6 for the others.