Robot Framework中如何遍历嵌套字典并访问内层字典值

报错根因 #

• 内层Get From Dictionary参数传值错误：你要从外层循环拿到的内层字典${value}中取值，但是代码里误写为还未定义的${value2}作为查询父对象，变量依赖解析异常触发了${key2}未找到的报错。
• 若使用Robot Framework 3.x及更早版本，本身不支持在Run Keyword If的分支内直接嵌套FOR循环，也会触发语法类报错。

修正后的代码（适用于Robot Framework 4.0+版本） #

FOR   ${key}   IN   @{dict.keys()}
    ${value}=    Get From Dictionary    ${dict}    ${key}
    ${type} =    Evaluate    type($value).__name__
    # 优化路径判断逻辑，避免非字符串类型报错
    ${is_path}=  Run Keyword If    ${type} == str    Evaluate    "/" in $value    ELSE    Set Variable    ${False}
    Log To Console   ${type}

    Run Keyword If    ${is_path}
    ...     Log To Console   ${key}, ${value}
    
    Run Keyword If    ${type} == dict
    ...     FOR   ${key2}   IN   @{value.keys()}
    ...     ${value2}=    Get From Dictionary    ${value}    ${key2}
    ...     Log To Console   ${key2}, ${value2}
    ...     # 如需支持更深层嵌套，可在此处添加递归判断逻辑
    ...     END
END

兼容旧版本（Robot Framework 3.x）的写法 #

把内层字典遍历逻辑封装为独立关键字即可：

*** Keywords ***
遍历内层字典
    [Arguments]    ${inner_dict}
    FOR   ${key2}   IN   @{inner_dict.keys()}
        ${value2}=    Get From Dictionary    ${inner_dict}    ${key2}
        Log To Console   ${key2}, ${value2}
    END

*** Test Cases ***
你的测试用例
    # 其他前置逻辑省略
    FOR   ${key}   IN   @{dict.keys()}
        ${value}=    Get From Dictionary    ${dict}    ${key}
        ${type} =    Evaluate    type($value).__name__
        ${is_path}=  Run Keyword If    ${type} == str    Evaluate    "/" in $value    ELSE    Set Variable    ${False}
        Log To Console   ${type}

        Run Keyword If    ${is_path}
        ...     Log To Console   ${key}, ${value}
        
        Run Keyword If    ${type} == dict
        ...     遍历内层字典    ${value}
    END

额外优化建议 #

如果存在3层及以上的嵌套字典，可以把整个遍历逻辑做成递归关键字，无需重复编写多层循环。

内容的提问来源于stack exchange，提问作者Norman Kuo