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Weakref: a cache need not keep an object alive

Publisher: ResumeMaker • 1 source

Published: 22 Oct 2026 16:11 · Updated: 22 Oct 2026 16:11

AI source check: 22 Oct 2026 14:04. This is not editorial approval.

In a few sentences

In brief

A weak reference alone does not keep an object alive. weakref helps supporting structures observe objects without determining their lifetime.

Useful to know

A weak reference alone does not keep an object alive. weakref helps supporting structures observe objects without determining their lifetime. [1]

When using a reference, check whether its target still exists. Not every Python type supports weak references in the same way. This is a decision about ownership, not simply a faster alternative to an ordinary dictionary.

Sources

For further detail and to check the information:

  1. [1] weakref — Weak references — Python 3.12.15 documentation ↗