python install_error ai_generated partial

ERROR: Cannot install numpy==1.26.4 and Cython>=3.0 because these package versions have conflicting dependencies. The conflict is caused by: The user requested numpy==1.26.4 Cython 3.0.10 depends on numpy>=2.0

ID: python/pip-build-deps-conflict-cython-numpy

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-10-02First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

Build-time dependencies and runtime pins were mixed in the same requirements file, creating an unsatisfiable graph.

generic

中文

构建时依赖和运行时固定版本被混在同一个 requirements 文件中，产生了无法满足的依赖图。

Workarounds

  1. 92% success 
    [build-system]
requires = ["setuptools>=68", "wheel", "Cython>=3.0", "numpy>=2.0"]
build-backend = "setuptools.build_meta"
# then
pip install .
  2. 85% success 
    echo 'numpy==1.26.4' > constraints.txt
pip install -c constraints.txt Cython>=3.0

Dead Ends

Common approaches that don't work:

  1. 80% fail

    Skips dependency installation entirely, leaving the environment broken at runtime.

  2. 70% fail

    Legacy resolver may install an inconsistent set silently, causing runtime errors.

  3. 50% fail

    May pull numpy 2.x, incompatible with other pinned packages in the project.