python install_error ai_generated partial

ERROR: ResolutionImpossible: Cannot install package-a and package-b because these package versions have conflicting dependencies.

ID: python/pip-resolver-backtracking-too-deep

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
0Evidence
2024-08-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

pip's dependency resolver (resolvelib) cannot find a set of package versions satisfying all constraints. This often occurs with transitive dependencies requiring mutually exclusive versions.

generic

中文

pip 的依赖解析器（resolvelib）无法找到满足所有约束的包版本集合。这通常发生在传递依赖要求互斥版本时。

Workarounds

  1. 80% success 
    pip install 'package-a==1.2.0' 'package-b==2.0.0'  # choose versions with compatible deps
  2. 60% success 
    pip install --use-deprecated=legacy-resolver package-a package-b

Dead Ends

Common approaches that don't work:

  1. 90% fail

    --force-reinstall reinstalls but does not resolve version conflicts; the resolver still fails.

  2. 85% fail

    Cache clearing does not change dependency metadata; the conflict remains.