python module_error ai_generated true

AttributeError: module 'unittest' has no attribute 'mock'

ID: python/attributeerror-unittest-no-mock

Also available as: JSON · Markdown · 中文
80%Fix Rate
87%Confidence
0Evidence
2024-03-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.2 active — — —
3.3 active — — —
3.4 active — — —

Root Cause

In Python 3.2 and earlier, mock is not part of unittest; must import mock separately or use unittest.mock in Python 3.3+.

generic

中文

在 Python 3.2 及更早版本中，mock 不是 unittest 的一部分；必须单独导入 mock 或在 Python 3.3+ 中使用 unittest.mock。

Workarounds

  1. 95% success Import mock from unittest for Python 3.3+ 
    from unittest.mock import Mock, patch
  2. 90% success Use backport mock for older Python 
    pip install mock; then from mock import Mock, patch

Dead Ends

Common approaches that don't work:

  1. Installing mock via pip 60% fail

    mock is available as a backport but not integrated into unittest; import path is different.

  2. Using unittest.mock without importing 80% fail

    If Python version is < 3.3, unittest.mock does not exist.