python config_error ai_generated true

ERROR: Invalid requirement: 'requests>=2..0' (from line 1 of requirements.txt)

ID: python/pip-invalid-requirement-version-specifier

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2024-03-12First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.8 active — — —
3.9 active — — —
3.10 active — — —
3.11 active — — —
3.12 active — — —

Root Cause

A version specifier in requirements.txt contains a malformed version number (e.g. double dots, trailing operators, or spaces inside the specifier), so pip's packaging parser rejects the whole line before resolving.

generic

中文

requirements.txt 中的版本说明符包含格式错误的版本号（例如双点、尾部操作符或说明符内部有空格），因此 pip 的 packaging 解析器在解析之前就拒绝了整行。

Workarounds

  1. 98% success 
    Edit requirements.txt:
  requests>=2.0
Then re-run:
  pip install -r requirements.txt
  2. 95% success 
    python - <<'PY'
from packaging.requirements import Requirement
for i, line in enumerate(open('requirements.txt'), 1):
    line = line.strip()
    if not line or line.startswith('#'):
        continue
    try:
        Requirement(line)
    except Exception as e:
        print(f'line {i}: {line!r} -> {e}')
PY

Dead Ends

Common approaches that don't work:

  1. 90% fail

    pip delegates version parsing to packaging.version; the grammar is strict and unchanged across pip versions, so upgrading does nothing.

  2. 85% fail

    Quotes become part of the requirement string and are still parsed as an invalid version, producing the same error.