python-clinic / Doc / library / _thread.rst

:mod:`_thread` --- Low-level threading API

This module provides low-level primitives for working with multiple threads (also called :dfn:`light-weight processes` or :dfn:`tasks`) --- multiple threads of control sharing their global data space. For synchronization, simple locks (also called :dfn:`mutexes` or :dfn:`binary semaphores`) are provided. The :mod:`threading` module provides an easier to use and higher-level threading API built on top of this module.

The module is optional. It is supported on Windows, Linux, SGI IRIX, Solaris 2.x, as well as on systems that have a POSIX thread (a.k.a. "pthread") implementation. For systems lacking the :mod:`_thread` module, the :mod:`_dummy_thread` module is available. It duplicates this module's interface and can be used as a drop-in replacement.

It defines the following constants and functions:

Lock objects have the following methods:

In addition to these methods, lock objects can also be used via the :keyword:`with` statement, e.g.:

import _thread

a_lock = _thread.allocate_lock()

with a_lock:
    print("a_lock is locked while this executes")


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