lxml.etree

http://www.cnblogs.com/bluescorpio/archive/2013/06/09/3127964.html

http://blog.csdn.net/u012063703/article/details/51754665

http://www.jianshu.com/p/f446663c970f

 

1. 判断是否有子元素或子节点

使用len(element)，这更清楚，也不容易犯错。

>>> print (etree.iselement(root))  # test if it's some kind of Element
True
>>> if len (root):                 # test if it has children
...     print ( "The root element has children" )
The root element has children
 2. How to get childcode
element.getchildren()
3  Create xml with encoding="utf-8"
print et.tostring(tree, xml_declaration=True, encoding="utf-8")

例子:

#!/usr/bin/env python

 

import os

import sys

import re

 

from lxml import etree

 

 

 

tree1 = etree.parse(r'default.xml')

root1 = tree1.getroot()

 

root = etree.Element('manifest')

 

#for child in root1.iter('project'):

for child in root1:

  if not isinstance(child, etree._Comment):

    if len(child):

      child_node = etree.SubElement(root, child.tag, child.attrib)

      for node in child.getchildren():

        etree.SubElement(child_node, node.tag, node.attrib)

        print node.tag, node.attrib

    else:

      etree.SubElement(root, child.tag, child.attrib)

  else:

    root.append(etree.Comment(child.text))

 

tree = etree.ElementTree(root)

tree.write('mytest.xml', pretty_print=True, xml_declaration=True, encoding="utf-8", method='xml')

 

"""

remote = etree.Element('remote', fetch="..", name="MTK", review="10.75.10.90:8080")

default = etree.Element('default', {'remote': "MTK", 'revision': "E1/MTK/MT6737M/8.0/dev", 'sync-c': 'true', 'sync-j': '4'})

#root.append(remote)

#root.append(default)

root.extend([remote, default])

"""

 

"""

etree.SubElement(root, 'remote', fetch="..", name="MTK", review="10.75.10.90:8080")

etree.SubElement(root, 'default', {'remote': "MTK", 'revision': "E1/MTK/MT6737M/8.0/dev", 'sync-c': 'true', 'sync-j': '4'})

etree.SubElement(root, 'project', groups="device,fugu,broadcom_pdk,pdk", name="MTK/device/asus/fugu", path="LINUX/android/device/asus/fugu", revision="22d134832ae86e1df7f2ceee7ce0fbb56155050f", upstream="MTK/MT6737M/8.0/PRS.2017.06.10.10.00")

 

 

xml_data = etree.tostring(root, pretty_print=True, xml_declaration=True, encoding="utf-8")

print xml_data

print 'write xml...'

tree = etree.ElementTree(root)

tree.write('mytest.xml', pretty_print=True, xml_declaration=True, encoding="utf-8")

#with open('your.xml', 'w') as f:

#  f.write(xml_data)

"""