ERROR pip config_error ai_generated true

ERROR: Cannot install package-a==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[extra1]>=3.0 and package-b 2.0 depends on package-c[extra2]>=3.0. To fix this, you could try to: 1. loosen the range of package versions you've specified. 2. remove package versions to allow pip to attempt to solve the dependency conflict.

ID: pip/dependency-conflict-with-extras-syntax

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
1Evidence
2023-11-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
pip 23.0 active — — —
pip 23.3 active — — —
pip 24.1 active — — —

Root Cause

Two packages require different extras of the same dependency package, and pip's resolver cannot install both extras simultaneously without a combined extra, leading to a dependency conflict.

generic

中文

两个软件包需要同一个依赖包的不同 extras，而 pip 的解析器无法在没有组合 extra 的情况下同时安装这两个 extras，导致依赖冲突。

Official Documentation

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

Workarounds

  1. 80% success Install the conflicting dependency with both extras using a combined specifier: pip install 'package-c[extra1,extra2]>=3.0' and then install the conflicting packages without version pins: pip install package-a package-b 
    Install the conflicting dependency with both extras using a combined specifier: pip install 'package-c[extra1,extra2]>=3.0' and then install the conflicting packages without version pins: pip install package-a package-b
  2. 85% success Create a virtual environment and use pip-compile (from pip-tools) to generate a resolved requirements.txt that includes both extras: pip-compile --extra=extra1 --extra=extra2 requirements.in 
    Create a virtual environment and use pip-compile (from pip-tools) to generate a resolved requirements.txt that includes both extras: pip-compile --extra=extra1 --extra=extra2 requirements.in
  3. 30% success Contact the maintainer of package-c to request a combined extra that includes both extra1 and extra2, or use a fork that merges them. 
    Contact the maintainer of package-c to request a combined extra that includes both extra1 and extra2, or use a fork that merges them.

中文步骤

  1. 使用组合说明符安装包含两个 extras 的冲突依赖：pip install 'package-c[extra1,extra2]>=3.0'，然后安装冲突的软件包而不固定版本：pip install package-a package-b
  2. 创建虚拟环境并使用 pip-compile（来自 pip-tools）生成包含两个 extras 的已解析 requirements.txt：pip-compile --extra=extra1 --extra=extra2 requirements.in
  3. 联系 package-c 的维护者，请求一个包含 extra1 和 extra2 的组合 extra，或使用合并了它们的 fork。

Dead Ends

Common approaches that don't work:

  1. Installing package-c[extra1,extra2] manually before the conflicting packages 85% fail

    Pip's resolver still sees the conflict because it evaluates the full dependency tree; manual pre-installation does not override the resolver's logic and may lead to an inconsistent state.

  2. Using --ignore-dependencies flag to force installation 90% fail

    This can cause runtime import errors or broken functionality because the required extras are not installed correctly.

  3. Downgrading both packages to versions that don't use extras 60% fail

    Such versions may not exist or may introduce other security or compatibility issues.