python module_error ai_generated true

AttributeError: <module 'unittest' from '.../unittest/__init__.py'> has no attribute 'mock'

ID: python/unittest-mock-not-callable-import

Also available as: JSON · Markdown · 中文
80%Fix Rate
90%Confidence
0Evidence
2024-01-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.9 active — — —
3.12 active — — —

Root Cause

The test uses `import unittest` and then `unittest.mock.patch`, but `unittest.mock` is not automatically imported as an attribute. It must be imported explicitly.

generic

中文

测试使用 `import unittest` 后调用 `unittest.mock.patch`，但 `unittest.mock` 不会自动作为属性导入，必须显式导入。

Workarounds

  1. 97% success 
    Import mock explicitly:

import unittest
from unittest import mock

class TestX(unittest.TestCase):
    @mock.patch('mymodule.func')
    def test_it(self, m):
        ...
  2. 97% success 
    Or import the submodule directly:

from unittest.mock import patch, MagicMock

Dead Ends

Common approaches that don't work:

  1. 95% fail

    unittest is part of the standard library; installing a PyPI package named 'unittest' either fails or installs an unrelated shim that shadows the stdlib.

  2. 90% fail

    Modifying the stdlib is fragile and the change is overwritten on interpreter upgrade.