python type_error ai_generated true

ValueError: 名称数量 (2) 和值数量 (3) 必须匹配

ValueError: The number of names (2) and values (3) must match

ID: python/pytest-parametrize-valueerror

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80%修复率
85%置信度
0证据数
2024-07-12首次发现

版本兼容性

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

根因分析

@pytest.mark.parametrize 装饰器中参数名称的数量与元组中的值的数量不匹配。

English

The @pytest.mark.parametrize decorator has a mismatch between the number of parameter names and the number of values in a tuple.

generic

解决方案

  1. 95% 成功率 
    Ensure each tuple in the values list has exactly the same number of elements as names: `@pytest.mark.parametrize('a,b', [(1,2), (3,4)])`
  2. 90% 成功率 
    Use a dictionary for named parameters if the count is variable: `@pytest.mark.parametrize('test_input,expected', [{'test_input': 1, 'expected': 2}])`

无效尝试

常见但无效的做法:

  1. 85% 失败

    This can lead to confusing test results and unused parameters that obscure the test's purpose.

  2. 70% 失败

    This changes the structure of the parameterization, often causing type errors or unexpected test cases.