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Title: Python support for free threading — Python 3.15.0a5 documentation

Open Graph Title: Python support for free threading

Description: Starting with the 3.13 release, CPython has support for a build of Python called free threading where the global interpreter lock(GIL) is disabled. Free-threaded execution allows for full utilizati...

Open Graph Description: Starting with the 3.13 release, CPython has support for a build of Python called free threading where the global interpreter lock(GIL) is disabled. Free-threaded execution allows for full utilizati...

Opengraph URL: https://docs.python.org/3/howto/free-threading-python.html

direct link

Domain: docs.python.org

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og:site_name	Python documentation
og:image:width	1146
og:image:height	600
og:image	https://docs.python.org/3.15/_images/social_previews/summary_howto_free-threading-python_52719009.png
og:image:alt	Starting with the 3.13 release, CPython has support for a build of Python called free threading where the global interpreter lock(GIL) is disabled. Free-threaded execution allows for full utilizati...
twitter:card	summary_large_image
theme-color	#3776ab
readthedocs-addons-api-version	1

Links:

	https://www.python.org/
Table of Contents	https://docs.python.org/dev/contents.html
Python support for free threading	https://docs.python.org/dev/howto/free-threading-python.html
Installation	https://docs.python.org/dev/howto/free-threading-python.html#installation
Identifying free-threaded Python	https://docs.python.org/dev/howto/free-threading-python.html#identifying-free-threaded-python
The global interpreter lock in free-threaded Python	https://docs.python.org/dev/howto/free-threading-python.html#the-global-interpreter-lock-in-free-threaded-python
Thread safety	https://docs.python.org/dev/howto/free-threading-python.html#thread-safety
Known limitations	https://docs.python.org/dev/howto/free-threading-python.html#known-limitations
Immortalization	https://docs.python.org/dev/howto/free-threading-python.html#immortalization
Frame objects	https://docs.python.org/dev/howto/free-threading-python.html#frame-objects
Iterators	https://docs.python.org/dev/howto/free-threading-python.html#iterators
Single-threaded performance	https://docs.python.org/dev/howto/free-threading-python.html#single-threaded-performance
Behavioral changes	https://docs.python.org/dev/howto/free-threading-python.html#behavioral-changes
Context variables	https://docs.python.org/dev/howto/free-threading-python.html#context-variables
Warning filters	https://docs.python.org/dev/howto/free-threading-python.html#warning-filters
The Python 2.3 Method Resolution Order	https://docs.python.org/dev/howto/mro.html
C API Extension Support for Free Threading	https://docs.python.org/dev/howto/free-threading-extensions.html
Report a bug	https://docs.python.org/dev/bugs.html
Show source	https://github.com/python/cpython/blob/main/Doc/howto/free-threading-python.rst?plain=1
index	https://docs.python.org/dev/genindex.html
modules	https://docs.python.org/dev/py-modindex.html
next	https://docs.python.org/dev/howto/free-threading-extensions.html
previous	https://docs.python.org/dev/howto/mro.html
Python	https://www.python.org/
3.15.0a5 Documentation	https://docs.python.org/dev/index.html
Python HOWTOs	https://docs.python.org/dev/howto/index.html
Python support for free threading	https://docs.python.org/dev/howto/free-threading-python.html
¶	https://docs.python.org/dev/howto/free-threading-python.html#python-support-for-free-threading
free threading	https://docs.python.org/dev/glossary.html#term-free-threading
global interpreter lock	https://docs.python.org/dev/glossary.html#term-global-interpreter-lock
extension module	https://docs.python.org/dev/glossary.html#term-extension-module
GIL	https://docs.python.org/dev/glossary.html#term-GIL
C API Extension Support for Free Threading	https://docs.python.org/dev/howto/free-threading-extensions.html#freethreading-extensions-howto
PEP 703	https://peps.python.org/pep-0703/
¶	https://docs.python.org/dev/howto/free-threading-python.html#installation
https://www.python.org/downloads/	https://www.python.org/downloads/
Installing a Free-Threaded Python	https://py-free-threading.github.io/installing-cpython/
--disable-gil	https://docs.python.org/dev/using/configure.html#cmdoption-disable-gil
¶	https://docs.python.org/dev/howto/free-threading-python.html#identifying-free-threaded-python
python -VV	https://docs.python.org/dev/using/cmdline.html#cmdoption-V
sys.version	https://docs.python.org/dev/library/sys.html#sys.version
sys._is_gil_enabled()	https://docs.python.org/dev/library/sys.html#sys._is_gil_enabled
¶	https://docs.python.org/dev/howto/free-threading-python.html#the-global-interpreter-lock-in-free-threaded-python
PYTHON_GIL	https://docs.python.org/dev/using/cmdline.html#envvar-PYTHON_GIL
-X gil	https://docs.python.org/dev/using/cmdline.html#cmdoption-X
https://py-free-threading.github.io/tracking/	https://py-free-threading.github.io/tracking/
https://hugovk.github.io/free-threaded-wheels/	https://hugovk.github.io/free-threaded-wheels/
¶	https://docs.python.org/dev/howto/free-threading-python.html#thread-safety
dict	https://docs.python.org/dev/library/stdtypes.html#dict
list	https://docs.python.org/dev/library/stdtypes.html#list
set	https://docs.python.org/dev/library/stdtypes.html#set
threading.Lock	https://docs.python.org/dev/library/threading.html#threading.Lock
¶	https://docs.python.org/dev/howto/free-threading-python.html#known-limitations
¶	https://docs.python.org/dev/howto/free-threading-python.html#immortalization
immortal	https://docs.python.org/dev/glossary.html#term-immortal
sys.intern()	https://docs.python.org/dev/library/sys.html#sys.intern
¶	https://docs.python.org/dev/howto/free-threading-python.html#frame-objects
frame.f_locals	https://docs.python.org/dev/reference/datamodel.html#frame.f_locals
frame	https://docs.python.org/dev/reference/datamodel.html#frame-objects
¶	https://docs.python.org/dev/howto/free-threading-python.html#iterators
¶	https://docs.python.org/dev/howto/free-threading-python.html#single-threaded-performance
¶	https://docs.python.org/dev/howto/free-threading-python.html#behavioral-changes
¶	https://docs.python.org/dev/howto/free-threading-python.html#context-variables
thread_inherit_context	https://docs.python.org/dev/library/sys.html#sys.flags.thread_inherit_context
threading.Thread	https://docs.python.org/dev/library/threading.html#threading.Thread
Context()	https://docs.python.org/dev/library/contextvars.html#contextvars.Context
start()	https://docs.python.org/dev/library/threading.html#threading.Thread.start
Context()	https://docs.python.org/dev/library/contextvars.html#contextvars.Context
¶	https://docs.python.org/dev/howto/free-threading-python.html#warning-filters
context_aware_warnings	https://docs.python.org/dev/library/sys.html#sys.flags.context_aware_warnings
warnings.catch_warnings	https://docs.python.org/dev/library/warnings.html#warnings.catch_warnings
catch_warnings	https://docs.python.org/dev/library/warnings.html#warnings.catch_warnings
warnings	https://docs.python.org/dev/library/warnings.html#module-warnings
Table of Contents	https://docs.python.org/dev/contents.html
Python support for free threading	https://docs.python.org/dev/howto/free-threading-python.html
Installation	https://docs.python.org/dev/howto/free-threading-python.html#installation
Identifying free-threaded Python	https://docs.python.org/dev/howto/free-threading-python.html#identifying-free-threaded-python
The global interpreter lock in free-threaded Python	https://docs.python.org/dev/howto/free-threading-python.html#the-global-interpreter-lock-in-free-threaded-python
Thread safety	https://docs.python.org/dev/howto/free-threading-python.html#thread-safety
Known limitations	https://docs.python.org/dev/howto/free-threading-python.html#known-limitations
Immortalization	https://docs.python.org/dev/howto/free-threading-python.html#immortalization
Frame objects	https://docs.python.org/dev/howto/free-threading-python.html#frame-objects
Iterators	https://docs.python.org/dev/howto/free-threading-python.html#iterators
Single-threaded performance	https://docs.python.org/dev/howto/free-threading-python.html#single-threaded-performance
Behavioral changes	https://docs.python.org/dev/howto/free-threading-python.html#behavioral-changes
Context variables	https://docs.python.org/dev/howto/free-threading-python.html#context-variables
Warning filters	https://docs.python.org/dev/howto/free-threading-python.html#warning-filters
The Python 2.3 Method Resolution Order	https://docs.python.org/dev/howto/mro.html
C API Extension Support for Free Threading	https://docs.python.org/dev/howto/free-threading-extensions.html
Report a bug	https://docs.python.org/dev/bugs.html
Show source	https://github.com/python/cpython/blob/main/Doc/howto/free-threading-python.rst?plain=1
index	https://docs.python.org/dev/genindex.html
modules	https://docs.python.org/dev/py-modindex.html
next	https://docs.python.org/dev/howto/free-threading-extensions.html
previous	https://docs.python.org/dev/howto/mro.html
Python	https://www.python.org/
3.15.0a5 Documentation	https://docs.python.org/dev/index.html
Python HOWTOs	https://docs.python.org/dev/howto/index.html
Python support for free threading	https://docs.python.org/dev/howto/free-threading-python.html
Copyright	https://docs.python.org/dev/copyright.html
History and License	https://docs.python.org/license.html
Please donate.	https://www.python.org/psf/donations/
Found a bug	https://docs.python.org/bugs.html
Sphinx	https://www.sphinx-doc.org/

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