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