python install_error ai_generated true

RuntimeError: Form data requires "python-multipart" to be installed.

ID: python/fastapi-form-data-missing-python-multipart

Also available as: JSON · Markdown · 中文
80%Fix Rate
90%Confidence
0Evidence
2024-03-22First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
0.100+ active — — —

Root Cause

A route used Form or File parameters but the python-multipart package was not installed in the environment.

generic

中文

路由使用了 Form 或 File 参数，但环境中未安装 python-multipart 包。

Workarounds

  1. 98% success 
    pip install python-multipart
  2. 95% success 
    echo 'python-multipart>=0.0.9' >> requirements.txt
pip install -r requirements.txt

Dead Ends

Common approaches that don't work:

  1. 80% fail

    Body expects JSON; form-encoded clients receive 422 errors.

  2. 90% fail

    There is no stdlib multipart parser; import fails.