python config_error ai_generated true

属性错误：<class 'module'> 没有属性 'some_function'

AttributeError: <class 'module'> does not have the attribute 'some_function'

ID: python/unittest-mock-patch-attribute-error

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80%修复率
88%置信度
0证据数
2025-03-08首次发现

版本兼容性

版本状态引入弃用备注
3.9 active — — —

根因分析

使用 @patch 或 patch.object 时，目标路径不正确（例如，修补不存在的属性）会在应用模拟时导致 AttributeError。

English

Using @patch or patch.object with an incorrect target path (e.g., patching a non-existent attribute) causes an AttributeError when the mock is applied.

generic

解决方案

  1. 90% 成功率 
    Verify the exact attribute path: e.g., patch('mymodule.submodule.some_function') and ensure the attribute exists in the module.
  2. 85% 成功率 
    Use patch.object with the actual object: patch.object(mymodule, 'some_function') after importing the module.

无效尝试

常见但无效的做法:

  1. 50% 失败

    Changing the patch target to a different module without verifying the attribute exists may still fail if the attribute is imported incorrectly.

  2. 60% 失败

    Using patch.object with a class that has the attribute but misspelling the attribute name leads to a similar error.