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Title: contextlib — Utilities for with-statement contexts — Python 3.9.24 documentation

Generator: Docutils 0.17.1: http://docutils.sourceforge.net/

Links:

	https://www.python.org/
Table of Contents	https://docs.python.org/3.9/contents.html
contextlib — Utilities for with-statement contexts	https://docs.python.org/3.9/library/contextlib.html
Utilities	https://docs.python.org/3.9/library/contextlib.html#utilities
Examples and Recipes	https://docs.python.org/3.9/library/contextlib.html#examples-and-recipes
Supporting a variable number of context managers	https://docs.python.org/3.9/library/contextlib.html#supporting-a-variable-number-of-context-managers
Catching exceptions from __enter__ methods	https://docs.python.org/3.9/library/contextlib.html#catching-exceptions-from-enter-methods
Cleaning up in an __enter__ implementation	https://docs.python.org/3.9/library/contextlib.html#cleaning-up-in-an-enter-implementation
Replacing any use of try-finally and flag variables	https://docs.python.org/3.9/library/contextlib.html#replacing-any-use-of-try-finally-and-flag-variables
Using a context manager as a function decorator	https://docs.python.org/3.9/library/contextlib.html#using-a-context-manager-as-a-function-decorator
Single use, reusable and reentrant context managers	https://docs.python.org/3.9/library/contextlib.html#single-use-reusable-and-reentrant-context-managers
Reentrant context managers	https://docs.python.org/3.9/library/contextlib.html#reentrant-context-managers
Reusable context managers	https://docs.python.org/3.9/library/contextlib.html#reusable-context-managers
dataclasses — Data Classes	https://docs.python.org/3.9/library/dataclasses.html
abc — Abstract Base Classes	https://docs.python.org/3.9/library/abc.html
Report a Bug	https://docs.python.org/3.9/bugs.html
Show Source	https://github.com/python/cpython/blob/3.9/Doc/library/contextlib.rst
Python documentation for the current stable release	https://docs.python.org/3/library/contextlib.html
index	https://docs.python.org/3.9/genindex.html
modules	https://docs.python.org/3.9/py-modindex.html
next	https://docs.python.org/3.9/library/abc.html
previous	https://docs.python.org/3.9/library/dataclasses.html
Python	https://www.python.org/
3.9.24 Documentation	https://docs.python.org/3.9/index.html
The Python Standard Library	https://docs.python.org/3.9/library/index.html
Python Runtime Services	https://docs.python.org/3.9/library/python.html
¶	https://docs.python.org/3.9/library/contextlib.html#module-contextlib
Lib/contextlib.py	https://github.com/python/cpython/tree/3.9/Lib/contextlib.py
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
Context Manager Types	https://docs.python.org/3.9/library/stdtypes.html#typecontextmanager
With Statement Context Managers	https://docs.python.org/3.9/reference/datamodel.html#context-managers
¶	https://docs.python.org/3.9/library/contextlib.html#utilities
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.AbstractContextManager
abstract base class	https://docs.python.org/3.9/glossary.html#term-abstract-base-class
object.__enter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__enter__
object.__exit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__exit__
object.__enter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__enter__
object.__exit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__exit__
Context Manager Types	https://docs.python.org/3.9/library/stdtypes.html#typecontextmanager
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.AbstractAsyncContextManager
abstract base class	https://docs.python.org/3.9/glossary.html#term-abstract-base-class
object.__aenter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__aenter__
object.__aexit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__aexit__
object.__aenter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__aenter__
object.__aexit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__aexit__
Asynchronous Context Managers	https://docs.python.org/3.9/reference/datamodel.html#async-context-managers
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.contextmanager
decorator	https://docs.python.org/3.9/glossary.html#term-decorator
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
__enter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__enter__
__exit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__exit__
generator	https://docs.python.org/3.9/glossary.html#term-generator
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
try	https://docs.python.org/3.9/reference/compound_stmts.html#try
except	https://docs.python.org/3.9/reference/compound_stmts.html#except
finally	https://docs.python.org/3.9/reference/compound_stmts.html#finally
contextmanager()	https://docs.python.org/3.9/library/contextlib.html#contextlib.contextmanager
ContextDecorator	https://docs.python.org/3.9/library/contextlib.html#contextlib.ContextDecorator
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
contextmanager()	https://docs.python.org/3.9/library/contextlib.html#contextlib.contextmanager
ContextDecorator	https://docs.python.org/3.9/library/contextlib.html#contextlib.ContextDecorator
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.asynccontextmanager
contextmanager()	https://docs.python.org/3.9/library/contextlib.html#contextlib.contextmanager
asynchronous context manager	https://docs.python.org/3.9/reference/datamodel.html#async-context-managers
decorator	https://docs.python.org/3.9/glossary.html#term-decorator
async with	https://docs.python.org/3.9/reference/compound_stmts.html#async-with
__aenter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__aenter__
__aexit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__aexit__
asynchronous generator	https://docs.python.org/3.9/glossary.html#term-asynchronous-generator
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.closing
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.nullcontext
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.suppress
reentrant	https://docs.python.org/3.9/library/contextlib.html#reentrant-cms
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.redirect_stdout
sys.stdout	https://docs.python.org/3.9/library/sys.html#sys.stdout
help()	https://docs.python.org/3.9/library/functions.html#help
io.StringIO	https://docs.python.org/3.9/library/io.html#io.StringIO
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
help()	https://docs.python.org/3.9/library/functions.html#help
help()	https://docs.python.org/3.9/library/functions.html#help
sys.stdout	https://docs.python.org/3.9/library/sys.html#sys.stdout
reentrant	https://docs.python.org/3.9/library/contextlib.html#reentrant-cms
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.redirect_stderr
redirect_stdout()	https://docs.python.org/3.9/library/contextlib.html#contextlib.redirect_stdout
sys.stderr	https://docs.python.org/3.9/library/sys.html#sys.stderr
reentrant	https://docs.python.org/3.9/library/contextlib.html#reentrant-cms
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.ContextDecorator
contextmanager()	https://docs.python.org/3.9/library/contextlib.html#contextlib.contextmanager
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
__enter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__enter__
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack.enter_context
__exit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__exit__
__enter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__enter__
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack.push
__exit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__exit__
__enter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__enter__
__exit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__exit__
__exit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__exit__
__exit__()	https://docs.python.org/3.9/reference/datamodel.html#object.__exit__
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack.callback
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack.pop_all
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack.close
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.AsyncExitStack
asynchronous context manager	https://docs.python.org/3.9/reference/datamodel.html#async-context-managers
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
aclose()	https://docs.python.org/3.9/library/contextlib.html#contextlib.AsyncExitStack.aclose
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.AsyncExitStack.enter_async_context
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.AsyncExitStack.push_async_exit
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.AsyncExitStack.push_async_callback
¶	https://docs.python.org/3.9/library/contextlib.html#contextlib.AsyncExitStack.aclose
asynccontextmanager()	https://docs.python.org/3.9/library/contextlib.html#contextlib.asynccontextmanager
¶	https://docs.python.org/3.9/library/contextlib.html#examples-and-recipes
contextlib	https://docs.python.org/3.9/library/contextlib.html#module-contextlib
¶	https://docs.python.org/3.9/library/contextlib.html#supporting-a-variable-number-of-context-managers
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
¶	https://docs.python.org/3.9/library/contextlib.html#catching-exceptions-from-enter-methods
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
try	https://docs.python.org/3.9/reference/compound_stmts.html#try
except	https://docs.python.org/3.9/reference/compound_stmts.html#except
finally	https://docs.python.org/3.9/reference/compound_stmts.html#finally
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
¶	https://docs.python.org/3.9/library/contextlib.html#cleaning-up-in-an-enter-implementation
ExitStack.push()	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack.push
__enter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__enter__
¶	https://docs.python.org/3.9/library/contextlib.html#replacing-any-use-of-try-finally-and-flag-variables
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
ExitStack.callback()	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack.callback
¶	https://docs.python.org/3.9/library/contextlib.html#using-a-context-manager-as-a-function-decorator
ContextDecorator	https://docs.python.org/3.9/library/contextlib.html#contextlib.ContextDecorator
ContextDecorator	https://docs.python.org/3.9/library/contextlib.html#contextlib.ContextDecorator
__enter__()	https://docs.python.org/3.9/reference/datamodel.html#object.__enter__
PEP 343	https://www.python.org/dev/peps/pep-0343
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
¶	https://docs.python.org/3.9/library/contextlib.html#single-use-reusable-and-reentrant-context-managers
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
contextmanager()	https://docs.python.org/3.9/library/contextlib.html#contextlib.contextmanager
¶	https://docs.python.org/3.9/library/contextlib.html#reentrant-context-managers
with	https://docs.python.org/3.9/reference/compound_stmts.html#with
threading.RLock	https://docs.python.org/3.9/library/threading.html#threading.RLock
suppress()	https://docs.python.org/3.9/library/contextlib.html#contextlib.suppress
redirect_stdout()	https://docs.python.org/3.9/library/contextlib.html#contextlib.redirect_stdout
redirect_stdout()	https://docs.python.org/3.9/library/contextlib.html#contextlib.redirect_stdout
sys.stdout	https://docs.python.org/3.9/library/sys.html#sys.stdout
¶	https://docs.python.org/3.9/library/contextlib.html#reusable-context-managers
threading.Lock	https://docs.python.org/3.9/library/threading.html#threading.Lock
threading.RLock	https://docs.python.org/3.9/library/threading.html#threading.RLock
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
ExitStack	https://docs.python.org/3.9/library/contextlib.html#contextlib.ExitStack
Table of Contents	https://docs.python.org/3.9/contents.html
contextlib — Utilities for with-statement contexts	https://docs.python.org/3.9/library/contextlib.html
Utilities	https://docs.python.org/3.9/library/contextlib.html#utilities
Examples and Recipes	https://docs.python.org/3.9/library/contextlib.html#examples-and-recipes
Supporting a variable number of context managers	https://docs.python.org/3.9/library/contextlib.html#supporting-a-variable-number-of-context-managers
Catching exceptions from __enter__ methods	https://docs.python.org/3.9/library/contextlib.html#catching-exceptions-from-enter-methods
Cleaning up in an __enter__ implementation	https://docs.python.org/3.9/library/contextlib.html#cleaning-up-in-an-enter-implementation
Replacing any use of try-finally and flag variables	https://docs.python.org/3.9/library/contextlib.html#replacing-any-use-of-try-finally-and-flag-variables
Using a context manager as a function decorator	https://docs.python.org/3.9/library/contextlib.html#using-a-context-manager-as-a-function-decorator
Single use, reusable and reentrant context managers	https://docs.python.org/3.9/library/contextlib.html#single-use-reusable-and-reentrant-context-managers
Reentrant context managers	https://docs.python.org/3.9/library/contextlib.html#reentrant-context-managers
Reusable context managers	https://docs.python.org/3.9/library/contextlib.html#reusable-context-managers
dataclasses — Data Classes	https://docs.python.org/3.9/library/dataclasses.html
abc — Abstract Base Classes	https://docs.python.org/3.9/library/abc.html
Report a Bug	https://docs.python.org/3.9/bugs.html
Show Source	https://github.com/python/cpython/blob/3.9/Doc/library/contextlib.rst
index	https://docs.python.org/3.9/genindex.html
modules	https://docs.python.org/3.9/py-modindex.html
next	https://docs.python.org/3.9/library/abc.html
previous	https://docs.python.org/3.9/library/dataclasses.html
Python	https://www.python.org/
3.9.24 Documentation	https://docs.python.org/3.9/index.html
The Python Standard Library	https://docs.python.org/3.9/library/index.html
Python Runtime Services	https://docs.python.org/3.9/library/python.html
Copyright	https://docs.python.org/3.9/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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