contextlib — Utilities for with-statement contexts — Python 3.9.25 documentation

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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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Context Manager Types

This module provides utilities for common tasks involving the with statement. For more information see also Context Manager Types and With Statement Context Managers.

With Statement Context Managers

This module provides utilities for common tasks involving the with statement. For more information see also Context Manager Types and With Statement Context Managers.

abstract base class

An abstract base class for classes that implement object.__enter__() and object.__exit__(). A default implementation for object.__enter__() is provided which returns self while object.__exit__() is an abstract method whi

Supporting a variable number of context managers¶

The primary use case for ExitStack is the one given in the class documentation: supporting a variable number of context managers and other cleanup operations in a single with statement. The variability may come from the

Reentrant context managers¶

More sophisticated context managers may be “reentrant”. These context managers can not only be used in multiple with statements, but may also be used inside a with statement that is already using the same context manager

Reentrant context managers¶

More sophisticated context managers may be “reentrant”. These context managers can not only be used in multiple with statements, but may also be used inside a with statement that is already using the same context manager