python data_error ai_generated partial

ERROR: ResolutionImpossible: because package-a depends on package-b and package-b depends on package-a

ID: python/pip-requirements-cyclic-dependency

Also available as: JSON · Markdown · 中文
80%Fix Rate
83%Confidence
0Evidence
2024-09-28First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.9 active — — —
3.10 active — — —
3.11 active — — —

Root Cause

Two or more packages have a circular dependency that pip's resolver cannot resolve.

generic

中文

两个或多个包存在循环依赖，pip 的解析器无法处理。

Workarounds

  1. 80% success Use a version of one package that breaks the cycle 
    Check if older versions avoid the circular dependency: `pip install package-a==1.0 package-b==2.0`
  2. 70% success Install packages in a specific order using --no-deps and then manually install dependencies 
    `pip install --no-deps package-a && pip install package-b && pip install package-a` (if circular is partial)

Dead Ends

Common approaches that don't work:

  1. Installing one package with --no-deps 70% fail

    This breaks the dependency chain, but the package may fail at runtime without its dependency.

  2. Using --force-reinstall 90% fail

    Reinstallation does not resolve the circular dependency; it just reinstalls the same conflicting versions.