ERROR pip install_error ai_generated partial

ERROR: Cannot install package-a[extra1,extra2]==1.0 and package-b==2.0 because these package versions have conflicting dependencies. The conflict is caused by: package-a 1.0 depends on package-c>=3.0 and package-b 2.0 depends on package-c<3.0.

ID: pip/dependency-conflict-with-extras

Also available as: JSON · Markdown · 中文
80%Fix Rate
90%Confidence
1Evidence
2024-03-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
pip 23.2 active — — —
pip 24.1 active — — —
pip 24.2 active — — —

Root Cause

Two requested packages have mutually exclusive version constraints on a shared dependency, and pip's resolver cannot find a version of the shared dependency that satisfies both constraints simultaneously.

generic

中文

两个请求的包对共享依赖项有互斥的版本约束，pip 的解析器无法找到同时满足两个约束的共享依赖版本。

Official Documentation

https://pip.pypa.io/en/stable/topics/dependency-resolution/#conflicting-dependencies

Workarounds

  1. 75% success Install an older version of package-a that depends on package-c<3.0: pip install 'package-a[extra1,extra2]<1.0' package-b==2.0 
    Install an older version of package-a that depends on package-c<3.0: pip install 'package-a[extra1,extra2]<1.0' package-b==2.0
  2. 60% success Use a virtual environment and install package-c at a version that satisfies both (e.g., package-c==2.99), then install packages without dependencies: pip install package-c==2.99 && pip install --no-deps package-a[extra1,extra2]==1.0 package-b==2.0 
    Use a virtual environment and install package-c at a version that satisfies both (e.g., package-c==2.99), then install packages without dependencies: pip install package-c==2.99 && pip install --no-deps package-a[extra1,extra2]==1.0 package-b==2.0
  3. 30% success Contact the package maintainers to relax version constraints or use a fork that resolves the conflict. 
    Contact the package maintainers to relax version constraints or use a fork that resolves the conflict.

中文步骤

  1. 安装旧版本的 package-a，该版本依赖于 package-c<3.0：pip install 'package-a[extra1,extra2]<1.0' package-b==2.0
  2. 使用虚拟环境，安装同时满足两个条件的 package-c 版本（例如 package-c==2.99），然后不安装依赖地安装包：pip install package-c==2.99 && pip install --no-deps package-a[extra1,extra2]==1.0 package-b==2.0
  3. 联系包维护者放宽版本约束，或使用解决冲突的分支。

Dead Ends

Common approaches that don't work:

  1. Force install both packages with --no-deps to skip dependency resolution 85% fail

    While this allows installation, the conflicting dependency package-c will be missing or have an incompatible version, causing runtime ImportError or AttributeError.

  2. Upgrade pip to the latest version hoping the resolver improves 70% fail

    The conflict is fundamental to the version constraints; no resolver can satisfy mutually exclusive requirements unless constraints are relaxed.