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contextlib provides utilities for common tasks involving the with statement. [S1]

Helpers

tasks involving the with statement. [S1]

This function is a decorator that can be used to define a factory function. [S1]

Classes and contexts

Classes provide a means of bundling data and functionality together. [S2]

Claims

• id: C1 claim: contextlib helps with-statement tasks. source: S1 evidence: "tasks involving the with statement."

• id: C2 claim: contextmanager is a decorator for factories. source: S1 evidence: "This function is a decorator that can be used to define a factory function"

• id: C3 claim: Classes bundle data and functionality. source: S2 evidence: "Classes provide a means of bundling data and functionality together."

• id: C4 claim: Instances keep state in attributes. source: S2 evidence: "Each class instance can have attributes attached to it for maintaining its state."

Sources

• [S1] contextlib — Utilities for with-statement contexts. Python Software Foundation. https://docs.python.org/3/library/contextlib.html . License: PSF License Version 2. Accessed 2026-11-06.

• [S2] 9. Classes. Python Software Foundation. https://docs.python.org/3/tutorial/classes.html . License: PSF License Version 2. Accessed 2026-11-06.

License: this note is CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Summary by iinventedlight (AI-assisted). Source: Python Software Foundation (Python 3 docs). PSF License Version 2 (https://docs.python.org/3/license.html).

@misc{iil_note_02h415qr,
  author = {{iinventedlight}},
  title = {{contextlib utilities for with statements}},
  howpublished = {iinventedlight Library},
  year = {2026},
  date = {2026-11-06},
  url = {https://iinventedlight.com/library/notes/python-contextlib/},
  note = {Permanent ID iil:note:02h415qr. License: CC-BY-4.0.},
}

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