横向对比分析Python解析XML的四种方式

  print("文件计数：%d/%d." % (gz_cnt,paser_num))  str_s,cnt = dom_parser(gz)  #str_s,cnt = sax_parser(gz)  #str_s,cnt = ET_parser(gz)  #str_s,cnt = ET_parser_iter(gz)  output.write(str_s)  vs_cnt += cnt

def dom_parser(gz):  import gzip,cStringIO  import xml.dom.minidom    vs_cnt = 0  str_s = ''  file_io = cStringIO.StringIO()  xm = gzip.open(gz,'rb')  print("已读入：%s./n解析中：" % (os.path.abspath(gz)))  doc = xml.dom.minidom.parseString(xm.read())  bulkPmMrDataFile = doc.documentElement  #读入子元素  enbs = bulkPmMrDataFile.getElementsByTagName("eNB")  measurements = enbs[0].getElementsByTagName("measurement")  objects = measurements[0].getElementsByTagName("object")  #写入csv文件  for object in objects:    vs = object.getElementsByTagName("v")    vs_cnt += len(vs)    for v in vs:      file_io.write(enbs[0].getAttribute("id")+' '+object.getAttribute("id")+' '+/      object.getAttribute("MmeUeS1apId")+' '+object.getAttribute("MmeGroupId")+' '+object.getAttribute("MmeCode")+' '+/      object.getAttribute("TimeStamp")+' '+v.childNodes[0].data+'/n') #获取文本值  str_s = (((file_io.getvalue().replace(' /n','/r/n')).replace(' ',',')).replace('T',' ')).replace('NIL','')  xm.close()  file_io.close()  return (str_s,vs_cnt)

def sax_parser(gz):  import os,gzip,cStringIO  from xml.parsers.expat import ParserCreate  #变量声明  d_eNB = {}  d_obj = {}  s = ''  global flag   flag = False  file_io = cStringIO.StringIO()    #Sax解析类  class DefaultSaxHandler(object):    #处理开始标签    def start_element(self, name, attrs):      global d_eNB      global d_obj      global vs_cnt      if name == 'eNB':        d_eNB = attrs      elif name == 'object':        d_obj = attrs      elif name == 'v':        file_io.write(d_eNB['id']+' '+ d_obj['id']+' '+d_obj['MmeUeS1apId']+' '+d_obj['MmeGroupId']+' '+d_obj['MmeCode']+' '+d_obj['TimeStamp']+' ')        vs_cnt += 1      else:        pass    #处理中间文本    def char_data(self, text):      global d_eNB      global d_obj      global flag      if text[0:1].isnumeric():        file_io.write(text)      elif text[0:17] == 'MR.LteScPlrULQci1':        flag = True        #print(text,flag)      else:        pass    #处理结束标签    def end_element(self, name):      global d_eNB      global d_obj      if name == 'v':        file_io.write('/n')      else:        pass    #Sax解析调用  handler = DefaultSaxHandler()  parser = ParserCreate()  parser.StartElementHandler = handler.start_element  parser.EndElementHandler = handler.end_element  parser.CharacterDataHandler = handler.char_data  vs_cnt = 0  str_s = ''  xm = gzip.open(gz,'rb')  print("已读入：%s./n解析中：" % (os.path.abspath(gz)))  for line in xm.readlines():    parser.Parse(line) #解析xml文件内容    if flag:      break  str_s = file_io.getvalue().replace(' /n','/r/n').replace(' ',',').replace('T',' ').replace('NIL','')  #写入解析后内容  xm.close()  file_io.close()  return (str_s,vs_cnt)

def ET_parser(gz):  import os,gzip,cStringIO  import xml.etree.cElementTree as ET  vs_cnt = 0  str_s = ''  file_io = cStringIO.StringIO()  xm = gzip.open(gz,'rb')  print("已读入：%s./n解析中：" % (os.path.abspath(gz)))  tree = ET.ElementTree(file=xm)  root = tree.getroot()  for elem in root[1][0].findall('object'):      for v in elem.findall('v'):          file_io.write(root[1].attrib['id']+' '+elem.attrib['TimeStamp']+' '+elem.attrib['MmeCode']+' '+/          elem.attrib['id']+' '+ elem.attrib['MmeUeS1apId']+' '+ elem.attrib['MmeGroupId']+' '+ v.text+'/n')      vs_cnt += 1  str_s = file_io.getvalue().replace(' /n','/r/n').replace(' ',',').replace('T',' ').replace('NIL','')  #写入解析后内容  xm.close()  file_io.close()  return (str_s,vs_cnt)

def ET_parser_iter(gz):  import os,gzip,cStringIO  import xml.etree.cElementTree as ET  vs_cnt = 0  str_s = ''  file_io = cStringIO.StringIO()  xm = gzip.open(gz,'rb')  print("已读入：%s./n解析中：" % (os.path.abspath(gz)))  d_eNB = {}  d_obj = {}  i = 0  for event,elem in ET.iterparse(xm,events=('start','end')):    if i >= 2:      break        elif event == 'start':          if elem.tag == 'eNB':              d_eNB = elem.attrib          elif elem.tag == 'object':        d_obj = elem.attrib      elif event == 'end' and elem.tag == 'smr':      i += 1    elif event == 'end' and elem.tag == 'v':      file_io.write(d_eNB['id']+' '+d_obj['TimeStamp']+' '+d_obj['MmeCode']+' '+d_obj['id']+' '+/      d_obj['MmeUeS1apId']+' '+ d_obj['MmeGroupId']+' '+str(elem.text)+'/n')          vs_cnt += 1      elem.clear()  str_s = file_io.getvalue().replace(' /n','/r/n').replace(' ',',').replace('T',' ').replace('NIL','')  #写入解析后内容  xm.close()  file_io.close()  return (str_s,vs_cnt)