<?xml version="1.0" encoding="UTF-8"?><framework>  <processers>    <processer name="AProcesser" file="lib64/A.so"      path="/tmp">    </processer>    <processer name="BProcesser" file="lib64/B.so" value="fordelete">    </processer>    <processer name="BProcesser" file="lib64/B.so2222222"/>    <services>      <service name="search" prefix="/bin/search?"        output_formatter="OutPutFormatter:service_inc">        <chain sequency="chain1"/>        <chain sequency="chain2"></chain>      </service>      <service name="update" prefix="/bin/update?">        <chain sequency="chain3" value="fordelete"/>      </service>    </services>  </processers></framework>

#!/usr/bin/python# -*- coding=utf-8 -*-# author : wklken@yeah.net# date: 2012-05-25# version: 0.1from xml.etree.ElementTree import ElementTree,Elementdef read_xml(in_path):  '''讀取并解析xml文件    in_path: xml路徑    return: ElementTree'''  tree = ElementTree()  tree.parse(in_path)  return treedef write_xml(tree, out_path):  '''將xml文件寫出    tree: xml樹    out_path: 寫出路徑'''  tree.write(out_path, encoding="utf-8",xml_declaration=True)def if_match(node, kv_map):  '''判斷某個(gè)節(jié)點(diǎn)是否包含所有傳入?yún)?shù)屬性    node: 節(jié)點(diǎn)    kv_map: 屬性及屬性值組成的map'''  for key in kv_map:    if node.get(key) != kv_map.get(key):      return False  return True#---------------search -----def find_nodes(tree, path):  '''查找某個(gè)路徑匹配的所有節(jié)點(diǎn)    tree: xml樹    path: 節(jié)點(diǎn)路徑'''  return tree.findall(path)def get_node_by_keyvalue(nodelist, kv_map):  '''根據(jù)屬性及屬性值定位符合的節(jié)點(diǎn)，返回節(jié)點(diǎn)    nodelist: 節(jié)點(diǎn)列表    kv_map: 匹配屬性及屬性值map'''  result_nodes = []  for node in nodelist:    if if_match(node, kv_map):      result_nodes.append(node)  return result_nodes#---------------change -----def change_node_properties(nodelist, kv_map, is_delete=False):  '''修改/增加 /刪除 節(jié)點(diǎn)的屬性及屬性值    nodelist: 節(jié)點(diǎn)列表    kv_map:屬性及屬性值map'''  for node in nodelist:    for key in kv_map:      if is_delete:        if key in node.attrib:          del node.attrib[key]      else:        node.set(key, kv_map.get(key))def change_node_text(nodelist, text, is_add=False, is_delete=False):  '''改變/增加/刪除一個(gè)節(jié)點(diǎn)的文本    nodelist:節(jié)點(diǎn)列表    text : 更新后的文本'''  for node in nodelist:    if is_add:      node.text += text    elif is_delete:      node.text = ""    else:      node.text = textdef create_node(tag, property_map, content):  '''新造一個(gè)節(jié)點(diǎn)    tag:節(jié)點(diǎn)標(biāo)簽    property_map:屬性及屬性值map    content: 節(jié)點(diǎn)閉合標(biāo)簽里的文本內(nèi)容    return 新節(jié)點(diǎn)'''  element = Element(tag, property_map)  element.text = content  return elementdef add_child_node(nodelist, element):  '''給一個(gè)節(jié)點(diǎn)添加子節(jié)點(diǎn)    nodelist: 節(jié)點(diǎn)列表    element: 子節(jié)點(diǎn)'''  for node in nodelist:    node.append(element)def del_node_by_tagkeyvalue(nodelist, tag, kv_map):  '''同過屬性及屬性值定位一個(gè)節(jié)點(diǎn)，并刪除之    nodelist: 父節(jié)點(diǎn)列表    tag:子節(jié)點(diǎn)標(biāo)簽    kv_map: 屬性及屬性值列表'''  for parent_node in nodelist:    children = parent_node.getchildren()    for child in children:      if child.tag == tag and if_match(child, kv_map):        parent_node.remove(child)if __name__ == "__main__":  #1. 讀取xml文件  tree = read_xml("./test.xml")  #2. 屬性修改   #A. 找到父節(jié)點(diǎn)  nodes = find_nodes(tree, "processers/processer")   #B. 通過屬性準(zhǔn)確定位子節(jié)點(diǎn)  result_nodes = get_node_by_keyvalue(nodes, {"name":"BProcesser"})   #C. 修改節(jié)點(diǎn)屬性  change_node_properties(result_nodes, {"age": "1"})   #D. 刪除節(jié)點(diǎn)屬性  change_node_properties(result_nodes, {"value":""}, True)  #3. 節(jié)點(diǎn)修改   #A.新建節(jié)點(diǎn)  a = create_node("person", {"age":"15","money":"200000"}, "this is the firest content")   #B.插入到父節(jié)點(diǎn)之下  add_child_node(result_nodes, a)  #4. 刪除節(jié)點(diǎn)    #定位父節(jié)點(diǎn)  del_parent_nodes = find_nodes(tree, "processers/services/service")    #準(zhǔn)確定位子節(jié)點(diǎn)并刪除之  target_del_node = del_node_by_tagkeyvalue(del_parent_nodes, "chain", {"sequency" : "chain1"})  #5. 修改節(jié)點(diǎn)文本    #定位節(jié)點(diǎn)  text_nodes = get_node_by_keyvalue(find_nodes(tree, "processers/services/service/chain"), {"sequency":"chain3"})  change_node_text(text_nodes, "new text")  #6. 輸出到結(jié)果文件  write_xml(tree, "./out.xml")

<?xml version='1.0' encoding='utf-8'?><framework>  <processers>    <processer file="lib64/A.so" name="AProcesser" path="/tmp">    </processer>    <processer age="1" file="lib64/B.so" name="BProcesser">      <person age="15" money="200000">this is the firest content</person>    </processer>    <processer age="1" file="lib64/B.so2222222" name="BProcesser">      <person age="15" money="200000">this is the firest content</person>    </processer>    <services>      <service name="search" output_formatter="OutPutFormatter:service_inc"        prefix="/bin/search?">        <chain sequency="chain2" />      </service>      <service name="update" prefix="/bin/update?">        <chain sequency="chain3" value="fordelete">new text</chain>      </service>    </services>  </processers></framework>