python module_error ai_generated true

E ImportError: cannot import name 'app' from 'myapp' (/path/to/myapp/__init__.py)

ID: python/pytest-collection-error-import-mismatch

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2024-09-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

pytest fails to collect tests because a test module imports a name that doesn't exist in the target module. This often occurs due to circular imports, missing __init__.py, or incorrect package structure.

generic

中文

pytest无法收集测试，因为测试模块导入了目标模块中不存在的名称。这通常是由于循环导入、缺少 __init__.py 或包结构不正确造成的。

Workarounds

  1. 95% success 
    Check myapp/__init__.py and myapp/app.py:

# myapp/__init__.py
from .app import app

Ensure the app object is defined in myapp/app.py.
  2. 90% success 
    Run: pip install -e .
Then in tests, use: from myapp import app
  3. 85% success 
    In conftest.py:

import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).parent.parent))

Dead Ends

Common approaches that don't work:

  1. 90% fail

    This creates a dummy import that may hide the real issue and break other parts of the application.

  2. 95% fail

    This skips all tests, providing no validation and defeating the purpose of testing.

  3. 80% fail

    Relative imports only work within packages and may cause issues when running tests from different directories.