python type_error ai_generated true

属性错误：Mock 对象没有属性 'some_method'

AttributeError: Mock object has no attribute 'some_method'

ID: python/attributeerror-mock-object-has-no-attribute

其他格式: JSON · Markdown 中文 · English
80%修复率
86%置信度
0证据数
2024-10-05首次发现

版本兼容性

版本状态引入弃用备注
3.8 active — — —
3.9 active — — —
3.10 active — — —

根因分析

创建模拟对象时未指定属性，代码尝试访问未定义的属性。

English

A mock object is created without specifying the attribute, and the code tries to access an undefined attribute.

generic

解决方案

  1. 95% 成功率 Configure mock with spec or autospec 
    mock = Mock(spec=MyClass); mock.some_method.return_value = 42
  2. 90% 成功率 Set attribute directly on mock 
    mock = Mock(); mock.some_method = MagicMock(return_value=42)

无效尝试

常见但无效的做法:

  1. Adding attribute via mock.attach_mock 60% 失败

    attach_mock is for attaching additional mocks, not simple attributes.

  2. Using mock.reset_mock() 80% 失败

    Reset clears call history but does not add missing attributes.