Question

我使用python请求模块从TeamCity rest api获取XML，如下所示：

<triggers count="10">
<trigger id="TRIGGER_1240" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="bt191"/>
    </properties>
</trigger>
<trigger id="TRIGGER_1241" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="bt171"/>
    </properties>
</trigger>
<trigger id="TRIGGER_1242" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="bt167"/>
    </properties>
</trigger>
<trigger id="TRIGGER_1243" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="bt164"/>
    </properties>
</trigger>
<trigger id="TRIGGER_1244" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="bt364"/>
    </properties>
</trigger>
<trigger id="TRIGGER_736" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="Components_Ratchetdb"/>
    </properties>
</trigger>
<trigger id="TRIGGER_149" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="Components_Filedb"/>
    </properties>
</trigger>
<trigger id="TRIGGER_150" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="bt168"/>
    </properties>
</trigger>
<trigger id="TRIGGER_1130" type="buildDependencyTrigger">
    <properties count="2">
        <property name="afterSuccessfulBuildOnly" value="true"/>
        <property name="dependsOn" value="Components_Tbldb"/>
    </properties>
</trigger>
<trigger id="vcsTrigger" type="vcsTrigger" inherited="true">
    <properties count="3">
        <property name="quietPeriod" value="60"/>
        <property name="quietPeriodMode" value="USE_DEFAULT"/>
        <property name="triggerRules" value="-:version.properties&#xA;-:comment=^Incremented:**&#xA;-:**/*-schema.sql"/>
    </properties>
</trigger>

我正在尝试创建一个＆＃34;触发器＆＃34;使用类的对象。理想情况下，对象将具有id，type和属性列表属性作为{name：value}的字典。到目前为止我的代码是：

class triggerList:
     def __init__(self, triggerId, triggerType):
         self.id = triggerId
         self.type = triggerType
         self.properties = []

     def add_property(self, buildProperty):
         self.properties.append(buildProperty)

def getAllTriggers(buildId):
     url = path + 'buildTypes/id:' + buildId + '/triggers'
     r = requests.get(url, auth=auth)
     tree = ElementTree.fromstring(r.content)
     listOfTriggers = []

     for trigger in tree.iter('trigger'):
         triggerType = trigger.get('type')
         triggerId = trigger.get('id')
         triggerName = str(triggerId)
         triggerName = triggerList(triggerId, triggerType)
         listOfTriggers.append(triggerName)

         for triggerProperty in tree.iter('property'):
             propertyName = triggerProperty.get('name')
             propertyValue = triggerProperty.get('value')
             propDict = {propertyName : propertyValue}
             triggerName.add_property(propDict)

这给了我一个对象列表，但每个对象都有一个每个属性字典的列表。这是输出：

a = listOfTriggers[1]
print a.id, a.type, a.properties

>>>  TRIGGER_1241 buildDependencyTrigger [{'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'bt191'}, {'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'bt171'}, {'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'bt167'}, {'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'bt164'}, {'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'bt364'}, {'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'Components_Ratchetdb'}, {'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'Components_Filedb'}, {'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'bt168'}, {'afterSuccessfulBuildOnly': 'true'}, {'dependsOn': 'Components_Tbldb'}, {'quietPeriod': '60'}, {'quietPeriodMode': 'USE_DEFAULT'}, {'triggerRules': '-:version.properties\n-:comment=^Incremented:**\n-:**/*-schema.sql'}]

我不知道如何仅针对特定触发器的属性停止循环。有没有办法使用ElementTree只获取特定触发器的属性？有没有更有效的方法来创建这个对象？

Answer 1

没有直接回答这个问题，但你可能在这里重新发明轮子，检查lxml.objectify package：

主要思想是隐藏普通Python背后的XML用法对象，有时也称为数据绑定。它允许你使用 XML就像处理普通的Python对象层次结构一样。访问XML元素的子元素会部署对象属性访问。如果有多个具有相同名称的子项，则切片和索引可以使用。 Python数据类型是从XML内容中提取的自动并使普通的Python操作员可以使用。

Answer 2

简单的语法错误：

for triggerProperty in trigger.iter('property'):
        propertyName = triggerProperty.get('name')
        propertyValue = triggerProperty.get('value')
        propDict = {propertyName : propertyValue}
        triggerName.add_property(propDict)

我在整个树上迭代，而不是触发器。应该是：

对于触发器中的triggerProperty .iter（'property'）：

使用XML ElementTree创建具有atrributes的对象列表

2 个答案: