Python遍历文件目录的三种实现方式详解

#coding:utf-8 
 
# 方法1：递归遍历目录 
 
import os 
def visitDir(path): 
  li = os.listdir(path) 
  for p in li: 
    pathname = os.path.join(path,p) 
    if not os.path.isfile(pathname):  #判断路径是否为文件，如果不是继续遍历 
      visitDir(pathname) 
    else: 
      print pathname 
 
if __name__ == "__main__": 
  path = r"/Users/GaoHongxing/Desktop" 
visitDir(path) 
      
# 方法2：函数递归 os.path.walk() 
 
import os, os.path 
 
def visitDir(arg, dirname, names): 
  for filepath in names: 
    print os.path.join(dirname, filepath) 
     
if __name__ == "__main__": 
  path = r"/Users/GaoHongxing/Desktop" 
  os.path.walk(path,visitDir,()) 
 
 
# 方法3： 函数递归os.walk() 
import os 
 
def visitDir(path): 
  for root, dirs, files in os.walk(path): 
    for filepath in files: 
      print os.path.join(root, filepath) 
       
if __name__ == "__main__": 
  path = r"/Users/GaoHongxing/Desktop"  
  visitDir(path)  
 
""" 
os.path.walk()与os.walk()产生的文件名列表不同： 
os.walk() 只产生文件路径 
os.path.walk()  产生目录树下的目录路径和文件路径 
"""