EC
PendingDeprecationWarning
PythonWARNINGCommonWarning

Feature may be deprecated in a future release

Quick Answer

Enable with -W all to see all PendingDeprecationWarnings during development; plan migration before they become DeprecationWarnings.

Production Risk

Low.

What this means

Signals that a feature may be deprecated in a future Python version but has not been formally deprecated yet. Silenced by default — only visible when warnings are explicitly enabled.

Why it happens
  1. 1Using a feature that the Python team is considering for deprecation in the next major version

Fix

Enable and audit during CI

Enable and audit during CI
# Run with all warnings enabled
python -W all my_script.py

# Or in pytest
pytest -W error::PendingDeprecationWarning

Why this works

Treating PendingDeprecationWarning as errors in CI prevents gradual accumulation of deferred migration work.

Sources

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