python类库31[使用xml.etree.ElementTree读写xml]
一 基本知识
1、插入节点
Element.insert(index, element) 、Element(tag[, attrib][, **extra]) 、SubElement(parent, tag[, attrib[, **extra]]) 、Element.append(subelement)
2、删除节点
Element.remove(subelement) 删除一个节点、Element.clear()删除该节点下所有子节点
3、在节点中插入属性
Element.set(key, value)
4、查找节点
a) Element.getiterator b) Element.getchildren c) Element.find d) Element.findall
二 读取xml
1）xml为
linux
30
windows
20
2）python脚本为
from xml.etree import ElementTree
def print_node(node):
print "====================================="
for key,value in node.items():
print "%s:%s" % (key, value)
for subnode in node.getchildren():
print "%s:%s" % (subnode.tag, subnode.text)
def read_xml(text = '', xmlfile = ''):
#root = ElementTree.parse(xmlfile)
root = ElementTree.fromstring(text)
# 1 getiterator()
# only elements whose tag equals tag are returned from the iterator
eitor = root.getiterator("employee")
for e in eitor:
print_node(e)
# 2 getchildren()
# Returns all subelements
eitor = root.getchildren()
for e in eitor:
print_node(e)
# 3 findall(match)
# Finds all subelements matching match.
# match may be a tag name or path. Returns an iterable yielding all matching elements
node_findall = root.findall("employee")
for e in node_findall:
print_node(e)
# 4 find(match)
# Finds the first subelement matching match.
# match may be a tag name or path. Returns an element instance or None
node_find = root.find('employee')
print_node(node_find)
if __name__ == '__main__':
read_xml(open("employees.xml").read())
参考：
http://blog.iyunv.com/kiki113/archive/2009/04/06/4052584.aspx
完！
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