Python之xml读写

遇到问题xml文件读写，没有子节点需要新建ChildNode。

 # -*- coding: utf-8 -*-
 import os
 import shutil
 import  xml.dom.minidom

 def correctxml(srcdir,finddir):
      num = 0
      list = os.listdir(srcdir)
      for i in range(0,len(list)):
           if list[i][-3:] == 'xml':
                #print(list[i]) #  0863091.res
                resdir = os.path.join(srcdir,list[i])
                # C:\\Users\\Administrator\\Desktop\\两类错误图像\\有效期限\\答案错误\\0863091.res
                restree = xml.dom.minidom.parse(resdir)
                res = restree.documentElement
                #value1 签发机构
                #resvalue1 = res.getElementsByTagName('field')[1].getAttribute('value')

                resvalue1 = res.getElementsByTagName('Field')[6].childNodes[0].nodeValue
                #value2 有效期限 .childNodes[0]
                #resvalue2 = res.getElementsByTagName('field')[2].getAttribute('value')
                #value3 签发日期
                #resvalue3 = res.getElementsByTagName('field')[3].getAttribute('value')
                #value4 有效期至
                #resvalue4 = res.getElementsByTagName('field')[4].getAttribute('value')
                if len(list[i]) == 11:
                     findpath = finddir + '\\' + list[i][:-7]
                else:
                     findpath = finddir + '\\0' + list[i][:-7]
                #findpath = finddir + '\\0' + list[i][:-7]
                findlist = os.listdir(findpath)

                for j in range(0,len(findlist)):
                     if list[i][:-4] == findlist[j][:-4]:
                          xmldir = os.path.join(findpath,findlist[j])
                          #print(xmldir)
                          xmltree = xml.dom.minidom.parse(xmldir)
                          solutionxml = xmltree.documentElement
                          if solutionxml.getElementsByTagName('Field')[6].hasChildNodes():
                               solutionxml.getElementsByTagName('Field')[6].childNodes[0].nodeValue = resvalue1 # 存在节点直接赋值
                          else:
                               solutionxml.getElementsByTagName('Field')[6].appendChild(xmltree.createTextNode(resvalue1)) # 不存在节点新建节点
                          element = solutionxml.getElementsByTagName('Field')
                          print(element)
                          #solutionxml.getElementsByTagName('Field')[2].childNodes[0].nodeValue = resvalue2
                          #solutionxml.getElementsByTagName('Field')[3].childNodes[0].nodeValue = resvalue3
                          #solutionxml.getElementsByTagName('Field')[4].childNodes[0].nodeValue = resvalue4

                          with open(xmldir,'w', encoding='UTF-8') as fh:
                               xmltree.writexml(fh,newl='\n',encoding='UTF-8')
                               num = num + 1  #  计数
                          file1 = open(xmldir, 'r', encoding='utf-8') # 要去掉空行的文件
                          file2 = open('C:\\Users\\WT\\Desktop\\1.xml', 'w', encoding='utf-8') # 生成没有空行的文件
                          for line in file1.readlines():
                               line = line.lstrip("\n")
                               file2.write(line)
                          file1 = open(xmldir, 'w', encoding='utf-8')
                          file2 = open('C:\\Users\\WT\\Desktop\\1.xml', 'r', encoding='utf-8')
                          for line in file2.readlines():
                               file1.write(line)
                          print('修改了'+ xmldir)

      print(num)

 correctxml('C:\\Users\\WT\\Desktop\\tmp',
            'D:\\标准样本库v2\\02 样本库\\02 标准答案\\06 机动车行驶证\\03 手机拍照\\01 自由拍照')

参考博客：https://blog.csdn.net/kongsuhongbaby/article/details/84869838