python module_error ai_generated true

ModuleNotFoundError: No module named 'myapp'

ID: python/pytest-import-mismatch-module-not-found

Also available as: JSON · Markdown · 中文
80%Fix Rate
90%Confidence
0Evidence
2024-02-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
7.x active — — —
8.x active — — —

Root Cause

pytest is run from a directory where the project root is not on sys.path. This often happens when tests are in a subdirectory and the package is not installed, or when using src layout without proper configuration.

generic

中文

pytest 在项目根目录不在 sys.path 上的目录中运行。这通常发生在测试位于子目录且包未安装，或使用 src 布局但未正确配置时。

Workarounds

  1. 90% success 
    Create conftest.py in the project root (even empty). pytest adds the rootdir to sys.path when it finds conftest.py.
  2. 98% success 
    Run: pip install -e .
Ensure setup.py or pyproject.toml is present with proper package discovery.
  3. 95% success 
    Run: python -m pytest tests/
This adds the current directory to sys.path.

Dead Ends

Common approaches that don't work:

  1. 70% fail

    The current working directory may not be the project root, and this is fragile.

  2. 80% fail

    This makes the parent directory not importable and often breaks relative imports.