Python如何使用lxml来读写xml格式文件的实例分享

annotation = etree.Element("annotation")

etree.SubElement(annotation, "folder").text = "VOC2014_instance"

etree.SubElement(annotation, "filename").text = "test.jpg"

source = etree.SubElement(annotation, "source")

etree.SubElement(source, "database").text = "COCO"

etree.SubElement(source, "annotation").text = "COCO"

etree.SubElement(source, "image").text = "COCO"

etree.SubElement(source, "url").text = "http://test.jpg"

size = etree.SubElement(annotation, "size")

etree.SubElement(size, "width").text ='800' # 必须用string

etree.SubElement(size, "height").text = '600'

etree.SubElement(size, "depth").text = '3'

etree.SubElement(annotation, "segmented").text = '0'

key_object = etree.SubElement(annotation, "object")

etree.SubElement(key_object, "name").text = “person”

bndbox = etree.SubElement(key_object, "bndbox")

etree.SubElement(bndbox, "xmin").text = str(100)

etree.SubElement(bndbox, "ymin").text = str(200)

etree.SubElement(bndbox, "xmax").text = str(300)

etree.SubElement(bndbox, "ymax").text = str(400)

etree.SubElement(key_object, "difficult").text = '0'

doc = etree.ElementTree(annotation)

doc.write(open("test.xml", "w"), pretty_print=True)

tree = etree.parse("test.xml")

# get bbox

for bbox in tree.xpath('//bndbox'):  # 获取bndbox元素的内容

  for corner in bbox.getchildren(): # 便利bndbox元素下的子元素

    print corner.text  # string类型