python实现复制大量文件功能

import osimport timeimport shutilsourceDir = 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)