Python使用ElementTree实现解析xml

<&＃63;xml version="1.0"&＃63;>

  
    2
    2008
    141100
    
    
  
  
    5
    2011
    59900
    
  
  
    69
    2011
    13600
    
    
  

try:
  import xml.etree.cElementTree as ET
except ImportError:
  import xml.etree.ElementTree as ET

tree = ET.parse("country.xml") # 
root = tree.getroot()      # 获取根节点 

import xml.etree.ElementTree as ET

tree = ET.parse("country.xml")
root = tree.getroot()
print(root.tag, ":", root.attrib) # 打印根元素的tag和属性
# 遍历xml文档的第二层
for child in root:
  # 第二层节点的标签名称和属性
  print(child.tag,":", child.attrib) 
  # 遍历xml文档的第三层
  for children in child:
    # 第三层节点的标签名称和属性
    print(children.tag, ":", children.attrib)

# 将所有的rank值加1,并添加属性updated为yes
for rank in root.iter("rank"):
  new_rank = int(rank.text) + 1
  rank.text = str(new_rank) # 必须将int转为str
  rank.set("updated", "yes") # 添加属性

# 再终端显示整个xml
ET.dump(root)
# 注意 修改的内容存在内存中 尚未保存到文件中
# 保存修改后的内容
tree.write("output.xml")

import xml.etree.ElementTree as ET

tree = ET.parse("output.xml")
root = tree.getroot()

for rank in root.iter("rank"):
  # attrib为属性字典
  # 删除对应的属性updated
  del rank.attrib[&＃39;updated&＃39;] 

ET.dump(root)

import xml.etree.ElementTree as ET

tree = ET.parse("country.xml")
root = tree.getroot()

# 删除rank大于50的国家
for country in root.iter("country"):
  rank = int(country.find("rank").text)
  if rank > 50:
    # remove()方法 删除子元素
    root.remove(country)

ET.dump(root)

import xml.etree.ElementTree as ET

tree = ET.parse("country.xml")
root = tree.getroot()

country = root[0]
last_ele = country[len(list(country))-1]
last_ele.tail = &＃39;\n\t\t&＃39;
# 创建新的元素, tag为test_append
elem1 = ET.Element("test_append")
elem1.text = "elem 1"
# elem.tail = &＃39;\n\t&＃39;
country.append(elem1)

# SubElement() 其实内部调用的时append()
elem2 = ET.SubElement(country, "test_subelement")
elem2.text = "elem 2"

# extend()
elem3 = ET.Element("test_extend")
elem3.text = "elem 3"
elem4 = ET.Element("test_extend")
elem4.text = "elem 4"
country.extend([elem3, elem4])

# insert()
elem5 = ET.Element("test_insert")
elem5.text = "elem 5"
country.insert(5, elem5)

ET.dump(country)

import xml.etree.ElementTree as ET


def subElement(root, tag, text):
  ele = ET.SubElement(root, tag)
  ele.text = text
  ele.tail = &＃39;\n&＃39;


root = ET.Element("note")

to = root.makeelement("to", {})
to.text = "peter"
to.tail = &＃39;\n&＃39;
root.append(to)

subElement(root, "from", "marry")
subElement(root, "heading", "Reminder")
subElement(root, "body", "Don&＃39;t forget the meeting!")

tree = ET.ElementTree(root)
tree.write("note.xml", encoding="utf-8", xml_declaration=True)

import xml.etree.ElementTree as ET
from xml.dom import minidom


def subElement(root, tag, text):
  ele = ET.SubElement(root, tag)
  ele.text = text


def saveXML(root, filename, indent="\t", newl="\n", encoding="utf-8"):
  rawText = ET.tostring(root)
  dom = minidom.parseString(rawText)
  with open(filename, &＃39;w&＃39;) as f:
    dom.writexml(f, "", indent, newl, encoding)
root = ET.Element("note")

to = root.makeelement("to", {})
to.text = "peter"
root.append(to)

subElement(root, "from", "marry")
subElement(root, "heading", "Reminder")
subElement(root, "body", "Don&＃39;t forget the meeting!")

# 保存xml文件
saveXML(root, "note.xml")