如何使递归函数在这个特定的 Python 脚本中工作？

分类：编程问答

如何解决如何使递归函数在这个特定的 Python 脚本中工作？

我正在使用 Python 处理这个项目，其中第一步涉及解析 xml 文件中的一些数据。但是，为此任务生成的 xml 文件创建了太多属性，需要以某种方式合并数据。

无论如何，我认为我需要做的第一件事是让递归函数工作。我一直在使用这个网站 (https://www.datacamp.com/community/tutorials/python-xml-elementtree) 作为指南以及其他各种谷歌搜索来编辑 xml 文件。但是，findall 函数在我的脚本中的工作方式似乎与互联网上每个人的建议不同。所以我想知道我哪里出错了。

这里是xml：

#define BOOST_TEST_MODULE test module name
#include <boost/test/included/unit_test.hpp>

现在，使用 ElementTree，我可以按照您的预期浏览 xml 元素，例如。

<session
    beginTime="2020-04-02T14:49:20"
    halSerialNumber="22F-0050"
    testMode="Remote"
    userName="Martin">
    <appliance overallResult="Passed" serialNumber="015055540215174421VPX4B6I1079">
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - CONTROL COVER"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="84.0"
                testDurationSeconds="2.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:07"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - CONTROL COVER"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="84.0"
                testDurationSeconds="2.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:14"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - CONTROL COVER"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="85.0"
                testDurationSeconds="2.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:19"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - CONTROL COVER"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="86.0"
                testDurationSeconds="2.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:24"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - BASE COVER"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="86.0"
                testDurationSeconds="1.90"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:29"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - BASE COVER"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="86.0"
                testDurationSeconds="2.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:34"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - BASE COVER"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="86.0"
                testDurationSeconds="2.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:39"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - BASE COVER"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="83.0"
                testDurationSeconds="2.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:45"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliohms="0.00"
                name="Earth Bond 50Hz - CAPACITOR NUT"
                numTests="1"
                startConditions="StartKey"
                targetOutputAmps="25.0"
                timeHoldSeconds="2.0"
                timeRampDownSeconds="0.0"
                timeRampUpSeconds="0.0"
                type="EarthBond50"
                upperLimitMilliohms="200.00"
            />
            <test_result
                appliedOutputAmps="25.0"
                earthBondResistanceMilliohms="82.0"
                testDurationSeconds="2.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:50:50"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                arcDetect="0"
                lowerLimitMilliamps="0.00"
                name="HiPot 50Hz"
                numTests="1"
                startConditions="None"
                targetOutputKilovolts="1.50"
                testVoltageOutput="Back"
                timeHoldSeconds="10.0"
                timeRampDownSeconds="2.0"
                timeRampUpSeconds="2.0"
                type="HiPot50"
                upperLimitMilliamps="2.50"
            />
            <test_result
                appliedOutputKilovolts="1.49"
                leakageMilliamps="0.43"
                testDurationSeconds="14.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:51:00"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliamps="0.05"
                name="Normal Connections"
                numTests="1"
                powerFactorLowerLimit="0.000"
                powerFactorUpperLimit="1.000"
                powerLowerLimitKVA="0.00"
                powerUpperLimitKVA="0.30"
                reversePolarity="0"
                startConditions="None"
                timeHoldSeconds="3.0"
                type="PowerLeakage"
                upperLimitMilliamps="0.50"
            />
            <test_result
                leakageMilliamps="0.10"
                powerAV="0.106"
                powerFactor="0.980"
                testDurationSeconds="3.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:51:51"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                lowerLimitMilliamps="0.00"
                name="Reverse Connections"
                numTests="1"
                powerFactorLowerLimit="0.000"
                powerFactorUpperLimit="1.000"
                powerLowerLimitKVA="0.00"
                powerUpperLimitKVA="0.30"
                reversePolarity="1"
                startConditions="None"
                timeHoldSeconds="3.0"
                type="PowerLeakage"
                upperLimitMilliamps="0.50"
            />
            <test_result
                leakageMilliamps="0.10"
                powerAV="0.106"
                powerFactor="0.979"
                testDurationSeconds="3.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:51:56"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                digitalOutputs="4"
                lowerLimitMilliamps="0.00"
                name="Single Fault Condition"
                numTests="1"
                powerFactorLowerLimit="0.000"
                powerFactorUpperLimit="1.000"
                powerLowerLimitKVA="0.00"
                powerUpperLimitKVA="0.30"
                reversePolarity="0"
                startConditions="None"
                timeHoldSeconds="3.0"
                type="PowerLeakage"
                upperLimitMilliamps="1.00"
            />
            <test_result
                leakageMilliamps="0.10"
                powerAV="0.007"
                powerFactor="0.756"
                testDurationSeconds="3.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:52:01"
            />
        </test_set>
        <test_set testState="Passed">
            <test
                analogueInput2LowerLimit="1.62"
                analogueInput2Scale="22"
                analogueInput2Title="Flow"
                analogueInput2Units=" l/m"
                analogueInput2UpperLimit="5"
                digitalOutputs="9"
                lowerLimitMilliamps="0.00"
                name="Flow"
                numTests="1"
                powerFactorLowerLimit="0.000"
                powerFactorUpperLimit="1.000"
                powerLowerLimitKVA="0.00"
                powerUpperLimitKVA="0.30"
                reversePolarity="0"
                startConditions="None"
                timeHoldSeconds="15.0"
                type="PowerLeakage"
                upperLimitMilliamps="0.50"
            />
            <test_result
                leakageMilliamps="0.10"
                powerAV="0.105"
                powerFactor="0.977"
                testDurationSeconds="15.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:52:06">
                <analogueInput2 name="Flow" units=" l/m" value="47.312" />
            </test_result>
        </test_set>
        <test_set testState="Passed">
            <test
                analogueInput1LowerLimit="0"
                analogueInput1Scale="37"
                analogueInput1Title="Vacuum"
                analogueInput1Units=" kPa"
                analogueInput1UpperLimit="0.4"
                digitalOutputs="8"
                lowerLimitMilliamps="0.00"
                name="Vacuum 10s"
                numTests="1"
                powerFactorLowerLimit="0.000"
                powerFactorUpperLimit="1.000"
                powerLowerLimitKVA="0.05"
                powerUpperLimitKVA="0.30"
                reversePolarity="0"
                startConditions="None"
                timeHoldSeconds="13.0"
                type="PowerLeakage"
                upperLimitMilliamps="0.50"
            />
            <test_result
                leakageMilliamps="0.10"
                powerAV="0.079"
                powerFactor="0.807"
                testDurationSeconds="13.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:52:23">
                <analogueInput1 name="Vacuum" units=" kPa" value="0.904" />
            </test_result>
        </test_set>
        <test_set testState="Passed">
            <test
                analogueInput1LowerLimit="0"
                analogueInput1Scale="37"
                analogueInput1Title="Vacuum"
                analogueInput1Units="kPa"
                analogueInput1UpperLimit="0.36"
                digitalOutputs="8"
                lowerLimitMilliamps="0.00"
                name="Vacuum 30s"
                numTests="1"
                powerFactorLowerLimit="0.000"
                powerFactorUpperLimit="1.000"
                powerLowerLimitKVA="0.00"
                powerUpperLimitKVA="0.30"
                reversePolarity="0"
                startConditions="None"
                timeHoldSeconds="33.0"
                type="PowerTLeakage"
                upperLimitMilliamps="0.50"
            />
            <test_result
                leakageMilliamps="0.00"
                powerAV="0.079"
                powerFactor="0.802"
                testDurationSeconds="33.00"
                testState="Passed"
                timeOfTest="2020-04-02T14:52:39">
                <analogueInput1 name="Vacuum" units="kPa" value="0.904" />
            </test_result>
        </test_set>
    </appliance>
</session>

返回结果：

for child in test_set:
    print(child.tag,child.attrib)

但是，当我尝试执行递归函数时，例如

test {'analogueInput1LowerLimit': '0','analogueInput1Scale': '37','analogueInput1Title': 'Vacuum','analogueInput1Units': 'kPa','analogueInput1UpperLimit': '0.36','digitalOutputs': '8','lowerLimitMilliamps': '0.00','name': 'Vacuum 30s','numTests': '1','powerFactorLowerLimit': '0.000','powerFactorUpperLimit': '1.000','powerLowerLimitKVA': '0.00','powerUpperLimitKVA': '0.30','reversePolarity': '0','startConditions': 'None','timeHoldSeconds': '33.0','type': 'PowerTLeakage','upperLimitMilliamps': '0.50'}
test_result {'leakageMilliamps': '0.00','powerAV': '0.079','powerFactor': '0.802','testDurationSeconds': '33.00','testState': 'Passed','timeOfTest': '2020-04-02T14:52:39'}

... 脚本将正常运行，但不会返回任何结果。我有点困惑，因为我看不出我在做什么与教程链接告诉我做什么有什么不同，或者与此相关的各种其他互联网资源。

我希望你们互联网天才能帮帮我，谢谢！

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