#_*_encoding:utf-8_*_ # -- seanyxie 2012.3.23 -- # ===minidom操作XML代码示例 import xml from xml.dom import minidom import codecs # ==由于minidom默认的writexml()函数在读取一个xml文件后，修改后重新写入如果加了newl='\n',会将原有的xml中写入多余的行 # ==因此使用下面这个函数来代替 def fixed_writexml(self, writer, indent="", addindent="", newl=""): # indent = current indentation # addindent = indentation to add to higher levels # newl = newline string writer.write(indent+"<" + self.tagName) attrs = self._get_attributes() a_names = attrs.keys() a_names.sort() for a_name in a_names: writer.write(" %s=\"" % a_name) minidom._write_data(writer, attrs[a_name].value) writer.write("\"") if self.childNodes: if len(self.childNodes) == 1 \ and self.childNodes[0].nodeType == minidom.Node.TEXT_NODE: writer.write(">") self.childNodes[0].writexml(writer, "", "", "") writer.write("</%s>%s" % (self.tagName, newl)) return writer.write(">%s"%(newl)) for node in self.childNodes: if node.nodeType is not minidom.Node.TEXT_NODE: node.writexml(writer,indent+addindent,addindent,newl) writer.write("%s</%s>%s" % (indent,self.tagName,newl)) else: writer.write("/>%s"%(newl)) minidom.Element.writexml = fixed_writexml def opXml(): # =====从一个空xml文档开始 impl = xml.dom.getDOMImplementation() dom = impl.createDocument(None,'All_Students',None) root = dom.documentElement # --创建一个节点，并添加到root下 student = dom.createElement('student') root.appendChild(student) # --创建一个子节点，并设置属性 nameE = dom.createElement('name') value = u'陈奕迅' nameE.setAttribute("attr",value) nameN = dom.createTextNode(value) nameE.appendChild(nameN) student.appendChild(nameE) # -- 写进文件,如果出现了unicode，指定文件的编码 f = codecs.open('1.xml','w','utf-8') dom.writexml(f,addindent=' ',newl='\n',encoding = 'utf-8') f.close() #=====处理一个已经存在的xml文档 dom = xml.dom.minidom.parse("1.xml") root = dom.documentElement # -- 重新设置属性 # --- 返回所有node name为student的节点 allnodes = dom.getElementsByTagName('student') value = u'王力宏' for node in allnodes: node.setAttribute('name',value) # --删除节点属性 for node in allnodes: node.removeAttribute('name') # --每个节点有 nodeType,nodeName,和nodeVaulue 等属性 # --对于textNode，想得到它的文本内容可以使用: .data属性 print node.nodeType,node.nodeValue # --也可以删除节点 root.removeChild(node) f = codecs.open('1.xml','w','utf-8') dom.writexml(f,addindent=' ',newl='\n',encoding = 'utf-8') f.close() if __name__=='__main__': opXml()上面的代码包含了python中minidom操作xml的常用操作
