import os
import time
from collections import deque

"""
利用递归实现目录的遍历
@para sourcePath:原文件目录
@para targetPath:目标文件目录
"""
def getDirAndCopyFile(sourcePath,targetPath):

  if not os.path.exists(sourcePath):
    return
  if not os.path.exists(targetPath):
    os.makedirs(targetPath)
    
  #遍历文件夹
  for fileName in os.listdir(sourcePath):
    #拼接原文件或者文件夹的绝对路径
    absourcePath = os.path.join(sourcePath, fileName)
    #拼接目标文件或者文件加的绝对路径
    abstargetPath = os.path.join(targetPath, fileName)
    #判断原文件的绝对路径是目录还是文件
    if os.path.isdir(absourcePath):
      #是目录就创建相应的目标目录
      os.makedirs(abstargetPath)
      #递归调用getDirAndCopyFile()函数
      getDirAndCopyFile(absourcePath,abstargetPath)
    #是文件就进行复制
    if os.path.isfile(absourcePath):
      rbf = open(absourcePath,"rb")
      wbf = open(abstargetPath,"wb")
      while True:
        content = rbf.readline(1024*1024)
        if len(content)==0:
          break
        wbf.write(content)
        wbf.flush()
      rbf.close()
      wbf.close()

if __name__ == '__main__':
  startTime = time.clock()
  sourcePath = r"H:\培训资料"
  targetPath = r"H:\培训资料_备份"
  getDirAndCopyFile(sourcePath,targetPath)
  #时间是用来计算复制总共消耗了多少时间
  endTime = time.clock()
  time_mi = endTime // 60
  time_s = endTime // 1 % 60
  time_ms = ((endTime * 100) // 1) % 100
  print("总用时:%02.0f:%02.0f:%2.0f" % (time_mi, time_s, time_ms))