python 操作 xml-优快云博客

本文介绍了一种使用Python从XML文件中查找特定元素的方法，并详细解释了如何通过元素属性及XPath语法进行精确匹配。

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根据属性去找这个元素，然后获取它的另一个属性值

def GetElement(TypeName,TypeValue):
    self.GetActivitXml("MarketTest")
    tree = ET.ElementTree(file=PATH("MarketTest.xml"))
    Elements = tree.iter(tag="node")
    for Element in Elements:
        if Element.attrib[TypeName] == TypeValue:
            bounds = Element.attrib["bounds"]

根据路径查找到元素

def GetXpathElement(xpath):
    self.GetActivitXml("MarketTest")
    tree = ET.ElementTree(file=PATH("MarketTest.xml"))
    root = tree.getroot()
    for index in xpath:
        root = root[index]

XPath 语法

语法	解释
tag	选中符合给定tag的全部孩子elements。 For example, spam selects all child elements named spam, and spam/egg selects all grandchildren named egg in all children namedspam.
*	选中全部孩子elements。 For example, */egg selects all grandchildren named egg.
.	选中当前element。 This is mostly useful at the beginning of the path, to indicate that it’s a relative path.
//	选中同一级别的全部子element. For example, .//egg selects all egg elements in the entire tree.
..	选中父亲节点；
[@attrib]	选中含有给定属性的全部节点。
[@attrib='value']	选中含有给定属性以及给定属性值的全部节点。The value cannot contain quotes.
[tag]	选中所有拥有一个叫做tag的孩子的elements。 Only immediate children are supported.
[position]	选中所有位于指定位置的elements。 The position can be either an integer (1 is the first position), the expression last() (for the last position), or a position relative to the last position (e.g. last()-1).

转载于:https://my.oschina.net/hibony/blog/810361