python实现复制大量文件功能

import os
import time
import shutil
sourceDir = r"D:\copytest\datatest"
targetDir = r"D:\copytest\result"
copyFileCounts = 0
 
def CopyFiles1(sourceDir, targetDir):
#完全连子目录也会复制好，美观
  global copyFileCounts
  print(sourceDir )
  print("%s 当前处理文件夹%s已处理%s 个文件" %(time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())), sourceDir,copyFileCounts) )
  for f in os.listdir(sourceDir):
    sourceF = os.path.join(sourceDir, f)
    targetF = os.path.join(targetDir, f)
 
    if os.path.isfile(sourceF):
 
      if not os.path.exists(targetDir):
        os.makedirs(targetDir)
      copyFileCounts += 1
 
 
      if not os.path.exists(targetF) or (os.path.exists(targetF) and (os.path.getsize(targetF) != os.path.getsize(sourceF))):
 
        open(targetF, "wb").write(open(sourceF, "rb").read())
        print ("%s %s 复制完毕" %(time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())), targetF))
      else:
        print ("%s %s 已存在，不重复复制" %(time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())), targetF))
 
    if os.path.isdir(sourceF):
      copyFiles(sourceF, targetF)
 
def CopyFiles2(dir):
  #会将目录下所有文件都复制在一起，速度快，可以筛选文件
  i=0
  for root,dir1,filename in os.walk(dir):
   #print(filename)
   for index in range(len(filename)):
    #print(os.path.splitext(filename[index])[1])
    #if os.path.splitext(filename[index])[1]=='.':#这里注意filename是个元组，splitext方法的时候只能是字符串
    if 1==1:
      #i+=1
      print('here')
      root1="D:\\copytest\\result3"
      old_path = os.path.join(root, filename[index])
      print(old_path)
      new_path = os.path.join(root1,filename[index])
      shutil.copyfile(old_path,new_path)
 
#print("总共有",i,"图层文件被复制！")
 
if __name__ == "__main__":
 time_start = time.time()
 try:
  import psyco
  psyco.profile()
 except ImportError:
   pass
 #CopyFiles1(sourceDir,targetDir)
 CopyFiles2("D:/copytest/datatest")
 time_end = time.time()
 print('totally cost', time_end - time_start)