python module_error ai_generated true

ImportError: cannot import name 'cm' from 'matplotlib' (unknown location)

ID: python/matplotlib-missing-colormap-module

Also available as: JSON · Markdown · 中文
80%Fix Rate
82%Confidence
0Evidence
2024-02-28First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.7 active — — —
3.8 active — — —

Root Cause

A corrupted or partial installation of matplotlib where the cm module is missing, or a naming conflict with a local file named matplotlib.py.

generic

中文

matplotlib安装损坏或不完整，导致cm模块缺失，或存在名为matplotlib.py的本地文件造成命名冲突。

Workarounds

  1. 85% success Check for local matplotlib.py file and rename it 
    import sys; print([p for p in sys.path if 'matplotlib.py' in p])
  2. 95% success Perform a clean reinstall in a new virtual environment 
    python -m venv newenv; source newenv/bin/activate; pip install matplotlib

Dead Ends

Common approaches that don't work:

  1. Reinstalling matplotlib with pip install --upgrade matplotlib 60% fail

    If the issue is a local file conflict, reinstallation may not help.

  2. Importing matplotlib.cm instead of from matplotlib import cm 90% fail

    Both should work; if cm is missing, both fail.