python data_error ai_generated true

ERROR: pip._vendor.packaging.requirements.InvalidRequirement: Expected ',' or end of string, got ';' in requirement 'numpy; python_version<"3.8"'

ID: python/pip-unsupported-format-version

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2025-04-12First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.7 active — — —
3.8 active — — —

Root Cause

The requirement string uses a semicolon for environment markers, but the syntax is incorrect or the packaging version is too old.

generic

中文

需求字符串使用分号表示环境标记，但语法错误或 packaging 版本太旧。

Workarounds

  1. 95% success Use proper syntax with environment markers 
    Write: 'numpy; python_version < "3.8"' (note space after semicolon and proper quoting).
  2. 90% success Upgrade packaging to support modern syntax 
    Run: pip install --upgrade packaging

Dead Ends

Common approaches that don't work:

  1. Removing the semicolon and marker entirely 70% fail

    Loses conditional installation logic.

  2. Using double quotes inside the marker 80% fail

    Syntax remains invalid; markers require proper quoting.