Python讀xml文件

常用的標註文件除了採用json格式外，還有xml格式。最近有需要在Python中讀xml文件，記錄下來以備後用。

標註文件內容示例如下：

<?xml version="1.0" encoding="utf-8"?>
<annotations>
  <version>1.1</version>
  <image id="1" name="0001.jpg" width="1920" height="1080">
    <box label="person" occluded="0" xtl="1300.80" ytl="69.89" xbr="1344.74" ybr="213.33">
      <attribute name="state">man</attribute>
    </box>
    <box label="person" occluded="0" xtl="1164.29" ytl="96.66" xbr="1224.44" ybr="253.65">
      <attribute name="state">women</attribute>
    </box>
  </image>
</annotations>

讀xml文件代碼如下：

from xml.dom.minidom import parse

# parse the xml file
xml_data = parse('test.xml')
rootNode = xml_data.documentElement

nodes = rootNode.getElementsByTagName('image')
for node in nodes:
    boxes = node.getElementsByTagName('box')
    for box in boxes:
        xytb = [float(box.getAttribute('xtl')), float(box.getAttribute('ytl')),
                float(box.getAttribute('xbr')), float(box.getAttribute('ybr'))]
        attribute = str(box.getElementsByTagName('attribute')[0].childNodes[0].data)