python文件操作之目录遍历实例分析

import os,sys
def listdir(dir,file):
  file.write(dir + '\n')
  fielnum = 0
  list = os.listdir(dir) #列出目录下的所有文件和目录
  for line in list:
    filepath = os.path.join(dir,line)
    if os.path.isdir(filepath): #如果filepath是目录，则再列出该目录下的所有文件
      myfile.write('  ' + line + '\\'+'\n')
      for li in os.listdir(filepath):
        myfile.write('   '+li + '\n')
        fielnum = fielnum + 1
    elif os.path:  #如果filepath是文件，直接列出文件名
      myfile.write('  '+line + '\n') 
      fielnum = fielnum + 1
  myfile.write('all the file num is '+ str(fielnum))
dir = raw_input('please input the path:')
myfile = open('list.txt','w')

import os
def walk_dir(dir,fileinfo,topdown=True):
  for root, dirs, files in os.walk(dir, topdown):
    for name in files:
      print(os.path.join(name))
      fileinfo.write(os.path.join(root,name) + '\n')
    for name in dirs:
      print(os.path.join(name))
      fileinfo.write(' ' + os.path.join(root,name) + '\n')
dir = raw_input('please input the path:')
fileinfo = open('list.txt','w')
walk_dir(dir,fileinfo)