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Title: contextlib — Utilities for with-statement contexts — Python 3.15.0a5 documentation

Open Graph Title: contextlib — Utilities for with-statement contexts

Description: Source code: Lib/contextlib.py This module provides utilities for common tasks involving the with statement. For more information see also Context Manager Types and With Statement Context Managers....

Open Graph Description: Source code: Lib/contextlib.py This module provides utilities for common tasks involving the with statement. For more information see also Context Manager Types and With Statement Context Managers....

Opengraph URL: https://docs.python.org/3/library/contextlib.html

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og:image:alt	Source code: Lib/contextlib.py This module provides utilities for common tasks involving the with statement. For more information see also Context Manager Types and With Statement Context Managers....
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Links:

	https://www.python.org/
Table of Contents	https://docs.python.org/dev/contents.html
contextlib — Utilities for with-statement contexts	https://docs.python.org/dev/library/contextlib.html
Utilities	https://docs.python.org/dev/library/contextlib.html#utilities
Examples and Recipes	https://docs.python.org/dev/library/contextlib.html#examples-and-recipes
Supporting a variable number of context managers	https://docs.python.org/dev/library/contextlib.html#supporting-a-variable-number-of-context-managers
Catching exceptions from __enter__ methods	https://docs.python.org/dev/library/contextlib.html#catching-exceptions-from-enter-methods
Cleaning up in an __enter__ implementation	https://docs.python.org/dev/library/contextlib.html#cleaning-up-in-an-enter-implementation
Replacing any use of try-finally and flag variables	https://docs.python.org/dev/library/contextlib.html#replacing-any-use-of-try-finally-and-flag-variables
Using a context manager as a function decorator	https://docs.python.org/dev/library/contextlib.html#using-a-context-manager-as-a-function-decorator
Single use, reusable and reentrant context managers	https://docs.python.org/dev/library/contextlib.html#single-use-reusable-and-reentrant-context-managers
Reentrant context managers	https://docs.python.org/dev/library/contextlib.html#reentrant-context-managers
Reusable context managers	https://docs.python.org/dev/library/contextlib.html#reusable-context-managers
dataclasses — Data Classes	https://docs.python.org/dev/library/dataclasses.html
abc — Abstract Base Classes	https://docs.python.org/dev/library/abc.html
Report a bug	https://docs.python.org/dev/bugs.html
Show source	https://github.com/python/cpython/blob/main/Doc/library/contextlib.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/library/abc.html
previous	https://docs.python.org/dev/library/dataclasses.html
Python	https://www.python.org/
3.15.0a5 Documentation	https://docs.python.org/dev/index.html
The Python Standard Library	https://docs.python.org/dev/library/index.html
Python Runtime Services	https://docs.python.org/dev/library/python.html
contextlib — Utilities for with-statement contexts	https://docs.python.org/dev/library/contextlib.html
¶	https://docs.python.org/dev/library/contextlib.html#module-contextlib
Lib/contextlib.py	https://github.com/python/cpython/tree/main/Lib/contextlib.py
with	https://docs.python.org/dev/reference/compound_stmts.html#with
Context Manager Types	https://docs.python.org/dev/library/stdtypes.html#typecontextmanager
With Statement Context Managers	https://docs.python.org/dev/reference/datamodel.html#context-managers
¶	https://docs.python.org/dev/library/contextlib.html#utilities
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.AbstractContextManager
abstract base class	https://docs.python.org/dev/glossary.html#term-abstract-base-class
object.__enter__()	https://docs.python.org/dev/reference/datamodel.html#object.__enter__
object.__exit__()	https://docs.python.org/dev/reference/datamodel.html#object.__exit__
object.__enter__()	https://docs.python.org/dev/reference/datamodel.html#object.__enter__
object.__exit__()	https://docs.python.org/dev/reference/datamodel.html#object.__exit__
Context Manager Types	https://docs.python.org/dev/library/stdtypes.html#typecontextmanager
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.AbstractAsyncContextManager
abstract base class	https://docs.python.org/dev/glossary.html#term-abstract-base-class
object.__aenter__()	https://docs.python.org/dev/reference/datamodel.html#object.__aenter__
object.__aexit__()	https://docs.python.org/dev/reference/datamodel.html#object.__aexit__
object.__aenter__()	https://docs.python.org/dev/reference/datamodel.html#object.__aenter__
object.__aexit__()	https://docs.python.org/dev/reference/datamodel.html#object.__aexit__
Asynchronous Context Managers	https://docs.python.org/dev/reference/datamodel.html#async-context-managers
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.contextmanager
decorator	https://docs.python.org/dev/glossary.html#term-decorator
with	https://docs.python.org/dev/reference/compound_stmts.html#with
__enter__()	https://docs.python.org/dev/reference/datamodel.html#object.__enter__
__exit__()	https://docs.python.org/dev/reference/datamodel.html#object.__exit__
generator	https://docs.python.org/dev/glossary.html#term-generator
with	https://docs.python.org/dev/reference/compound_stmts.html#with
with	https://docs.python.org/dev/reference/compound_stmts.html#with
try	https://docs.python.org/dev/reference/compound_stmts.html#try
except	https://docs.python.org/dev/reference/compound_stmts.html#except
finally	https://docs.python.org/dev/reference/compound_stmts.html#finally
contextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.contextmanager
ContextDecorator	https://docs.python.org/dev/library/contextlib.html#contextlib.ContextDecorator
with	https://docs.python.org/dev/reference/compound_stmts.html#with
contextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.contextmanager
ContextDecorator	https://docs.python.org/dev/library/contextlib.html#contextlib.ContextDecorator
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.asynccontextmanager
contextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.contextmanager
asynchronous context manager	https://docs.python.org/dev/reference/datamodel.html#async-context-managers
decorator	https://docs.python.org/dev/glossary.html#term-decorator
async with	https://docs.python.org/dev/reference/compound_stmts.html#async-with
__aenter__()	https://docs.python.org/dev/reference/datamodel.html#object.__aenter__
__aexit__()	https://docs.python.org/dev/reference/datamodel.html#object.__aexit__
asynchronous generator	https://docs.python.org/dev/glossary.html#term-asynchronous-generator
asynccontextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.asynccontextmanager
async with	https://docs.python.org/dev/reference/compound_stmts.html#async-with
asynccontextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.asynccontextmanager
asynccontextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.asynccontextmanager
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.closing
with	https://docs.python.org/dev/reference/compound_stmts.html#with
context manager	https://docs.python.org/dev/glossary.html#term-context-manager
with	https://docs.python.org/dev/reference/compound_stmts.html#with
urlopen()	https://docs.python.org/dev/library/urllib.request.html#urllib.request.urlopen
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.aclosing
break	https://docs.python.org/dev/reference/simple_stmts.html#break
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.nullcontext
asynchronous context managers	https://docs.python.org/dev/reference/datamodel.html#async-context-managers
asynchronous context manager	https://docs.python.org/dev/glossary.html#term-asynchronous-context-manager
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.suppress
reentrant	https://docs.python.org/dev/library/contextlib.html#reentrant-cms
BaseExceptionGroup	https://docs.python.org/dev/library/exceptions.html#BaseExceptionGroup
derive()	https://docs.python.org/dev/library/exceptions.html#BaseExceptionGroup.derive
BaseExceptionGroup	https://docs.python.org/dev/library/exceptions.html#BaseExceptionGroup
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.redirect_stdout
sys.stdout	https://docs.python.org/dev/library/sys.html#sys.stdout
file object	https://docs.python.org/dev/glossary.html#term-file-object
sys.stdout	https://docs.python.org/dev/library/sys.html#sys.stdout
help()	https://docs.python.org/dev/library/functions.html#help
io.StringIO	https://docs.python.org/dev/library/io.html#io.StringIO
with	https://docs.python.org/dev/reference/compound_stmts.html#with
help()	https://docs.python.org/dev/library/functions.html#help
help()	https://docs.python.org/dev/library/functions.html#help
sys.stdout	https://docs.python.org/dev/library/sys.html#sys.stdout
reentrant	https://docs.python.org/dev/library/contextlib.html#reentrant-cms
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.redirect_stderr
redirect_stdout()	https://docs.python.org/dev/library/contextlib.html#contextlib.redirect_stdout
sys.stderr	https://docs.python.org/dev/library/sys.html#sys.stderr
file object	https://docs.python.org/dev/glossary.html#term-file-object
reentrant	https://docs.python.org/dev/library/contextlib.html#reentrant-cms
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.chdir
chdir()	https://docs.python.org/dev/library/os.html#os.chdir
reentrant	https://docs.python.org/dev/library/contextlib.html#reentrant-cms
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.ContextDecorator
contextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.contextmanager
with	https://docs.python.org/dev/reference/compound_stmts.html#with
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.AsyncContextDecorator
ContextDecorator	https://docs.python.org/dev/library/contextlib.html#contextlib.ContextDecorator
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
__enter__()	https://docs.python.org/dev/reference/datamodel.html#object.__enter__
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/dev/reference/compound_stmts.html#with
with	https://docs.python.org/dev/reference/compound_stmts.html#with
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.enter_context
__exit__()	https://docs.python.org/dev/reference/datamodel.html#object.__exit__
__enter__()	https://docs.python.org/dev/reference/datamodel.html#object.__enter__
with	https://docs.python.org/dev/reference/compound_stmts.html#with
TypeError	https://docs.python.org/dev/library/exceptions.html#TypeError
AttributeError	https://docs.python.org/dev/library/exceptions.html#AttributeError
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.push
__exit__()	https://docs.python.org/dev/reference/datamodel.html#object.__exit__
__enter__()	https://docs.python.org/dev/reference/datamodel.html#object.__enter__
__exit__()	https://docs.python.org/dev/reference/datamodel.html#object.__exit__
__exit__()	https://docs.python.org/dev/reference/datamodel.html#object.__exit__
__exit__()	https://docs.python.org/dev/reference/datamodel.html#object.__exit__
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.callback
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.pop_all
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/dev/reference/compound_stmts.html#with
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.close
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.AsyncExitStack
asynchronous context manager	https://docs.python.org/dev/reference/datamodel.html#async-context-managers
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
close()	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.close
aclose()	https://docs.python.org/dev/library/contextlib.html#contextlib.AsyncExitStack.aclose
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.AsyncExitStack.enter_async_context
ExitStack.enter_context()	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.enter_context
TypeError	https://docs.python.org/dev/library/exceptions.html#TypeError
AttributeError	https://docs.python.org/dev/library/exceptions.html#AttributeError
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.AsyncExitStack.push_async_exit
ExitStack.push()	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.push
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.AsyncExitStack.push_async_callback
ExitStack.callback()	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.callback
¶	https://docs.python.org/dev/library/contextlib.html#contextlib.AsyncExitStack.aclose
ExitStack.close()	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.close
asynccontextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.asynccontextmanager
¶	https://docs.python.org/dev/library/contextlib.html#examples-and-recipes
contextlib	https://docs.python.org/dev/library/contextlib.html#module-contextlib
¶	https://docs.python.org/dev/library/contextlib.html#supporting-a-variable-number-of-context-managers
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/dev/reference/compound_stmts.html#with
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/dev/reference/compound_stmts.html#with
¶	https://docs.python.org/dev/library/contextlib.html#catching-exceptions-from-enter-methods
with	https://docs.python.org/dev/reference/compound_stmts.html#with
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
try	https://docs.python.org/dev/reference/compound_stmts.html#try
except	https://docs.python.org/dev/reference/compound_stmts.html#except
finally	https://docs.python.org/dev/reference/compound_stmts.html#finally
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
with	https://docs.python.org/dev/reference/compound_stmts.html#with
¶	https://docs.python.org/dev/library/contextlib.html#cleaning-up-in-an-enter-implementation
ExitStack.push()	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.push
__enter__()	https://docs.python.org/dev/reference/datamodel.html#object.__enter__
¶	https://docs.python.org/dev/library/contextlib.html#replacing-any-use-of-try-finally-and-flag-variables
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
ExitStack.callback()	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack.callback
¶	https://docs.python.org/dev/library/contextlib.html#using-a-context-manager-as-a-function-decorator
ContextDecorator	https://docs.python.org/dev/library/contextlib.html#contextlib.ContextDecorator
ContextDecorator	https://docs.python.org/dev/library/contextlib.html#contextlib.ContextDecorator
__enter__()	https://docs.python.org/dev/reference/datamodel.html#object.__enter__
PEP 343	https://peps.python.org/pep-0343/
with	https://docs.python.org/dev/reference/compound_stmts.html#with
¶	https://docs.python.org/dev/library/contextlib.html#single-use-reusable-and-reentrant-context-managers
with	https://docs.python.org/dev/reference/compound_stmts.html#with
with	https://docs.python.org/dev/reference/compound_stmts.html#with
with	https://docs.python.org/dev/reference/compound_stmts.html#with
contextmanager()	https://docs.python.org/dev/library/contextlib.html#contextlib.contextmanager
¶	https://docs.python.org/dev/library/contextlib.html#reentrant-context-managers
with	https://docs.python.org/dev/reference/compound_stmts.html#with
threading.RLock	https://docs.python.org/dev/library/threading.html#threading.RLock
suppress()	https://docs.python.org/dev/library/contextlib.html#contextlib.suppress
redirect_stdout()	https://docs.python.org/dev/library/contextlib.html#contextlib.redirect_stdout
chdir()	https://docs.python.org/dev/library/contextlib.html#contextlib.chdir
redirect_stdout()	https://docs.python.org/dev/library/contextlib.html#contextlib.redirect_stdout
sys.stdout	https://docs.python.org/dev/library/sys.html#sys.stdout
¶	https://docs.python.org/dev/library/contextlib.html#reusable-context-managers
threading.Lock	https://docs.python.org/dev/library/threading.html#threading.Lock
threading.RLock	https://docs.python.org/dev/library/threading.html#threading.RLock
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
ExitStack	https://docs.python.org/dev/library/contextlib.html#contextlib.ExitStack
Table of Contents	https://docs.python.org/dev/contents.html
contextlib — Utilities for with-statement contexts	https://docs.python.org/dev/library/contextlib.html
Utilities	https://docs.python.org/dev/library/contextlib.html#utilities
Examples and Recipes	https://docs.python.org/dev/library/contextlib.html#examples-and-recipes
Supporting a variable number of context managers	https://docs.python.org/dev/library/contextlib.html#supporting-a-variable-number-of-context-managers
Catching exceptions from __enter__ methods	https://docs.python.org/dev/library/contextlib.html#catching-exceptions-from-enter-methods
Cleaning up in an __enter__ implementation	https://docs.python.org/dev/library/contextlib.html#cleaning-up-in-an-enter-implementation
Replacing any use of try-finally and flag variables	https://docs.python.org/dev/library/contextlib.html#replacing-any-use-of-try-finally-and-flag-variables
Using a context manager as a function decorator	https://docs.python.org/dev/library/contextlib.html#using-a-context-manager-as-a-function-decorator
Single use, reusable and reentrant context managers	https://docs.python.org/dev/library/contextlib.html#single-use-reusable-and-reentrant-context-managers
Reentrant context managers	https://docs.python.org/dev/library/contextlib.html#reentrant-context-managers
Reusable context managers	https://docs.python.org/dev/library/contextlib.html#reusable-context-managers
dataclasses — Data Classes	https://docs.python.org/dev/library/dataclasses.html
abc — Abstract Base Classes	https://docs.python.org/dev/library/abc.html
Report a bug	https://docs.python.org/dev/bugs.html
Show source	https://github.com/python/cpython/blob/main/Doc/library/contextlib.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/library/abc.html
previous	https://docs.python.org/dev/library/dataclasses.html
Python	https://www.python.org/
3.15.0a5 Documentation	https://docs.python.org/dev/index.html
The Python Standard Library	https://docs.python.org/dev/library/index.html
Python Runtime Services	https://docs.python.org/dev/library/python.html
contextlib — Utilities for with-statement contexts	https://docs.python.org/dev/library/contextlib.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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