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Create xml.md
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‎CorePythonProgramming/xml.md‎

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## 1.构建xml文件
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```python
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# -*- coding: utf-8 -*-
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import xml.etree.ElementTree as ET
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root = ET.Element("html")
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head = ET.SubElement(root, "head")
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title = ET.SubElement(head, "title")
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title.text = "Title"
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body = ET.SubElement(root, "body")
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body.set("bgcolor", "#ffffff")
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body.text = "Hello, World!"
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tree = ET.ElementTree(root)
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tree.write("hello.xhtml")
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```
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hello.xhtml：
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<html><head><title>Title</title></head><body bgcolor="#ffffff">Hello, World!</body></html>
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## 2.加载xml文件
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```python
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# -*- coding: utf-8 -*-
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import xml.etree.ElementTree as ET
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tree = ET.parse("hello.xhtml")
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print tree.findtext("head/title")
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root = tree.getroot()
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# do something here
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tree.write("out.xml")
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```
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输出：
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Title
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out.xml:
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<html><head><title>Title</title></head><body bgcolor="#ffffff">Hello, World!</body></html>

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