介绍两种方法

import time

x = time.clock()

#方法1

import string, os, sys 
 
def get_path(dir):
    filelist = ”

    for root, dirs, files in os.walk(dir):
        for name in files:
            if name.lower().find(‘.txt’) != -1 or name.lower().find(‘.iso’) != -1:
                fp = os.path.join(root, name)
                if os.path.isfile(fp) and not os.path.islink(fp):
                    filelist = filelist + fp + ‘\n’

    f = open(r’D:\Share\mspt\filelist-1.txt’,’aw’)
    f.write(filelist)
    f.close()

dir = r’D:\Share\mspt\MSDN’ 
for n in range(100):
    get_path(dir)
y = time.clock()

f = open(r’D:\Share\mspt\filelist-1.txt’,’aw’)
f.write(‘——————————–\n’)
f.close()

z = time.clock()

#方法2
import os
def ls(arg, dirname, files):
    filelist = ”
    for x in files:
        if os.path.isfile(dirname+’\\’+x) and not os.path.islink(dirname+’\\’+x) and (x.lower().find(‘.txt’)!=-1 or x.lower().find(‘.iso’)!=-1):
            filelist = filelist + dirname + ‘\\’ + x + ‘\n’

    f = open(r’D:\Share\mspt\filelist-1.txt’,’aw’)
    f.write(filelist)
    f.close()

for n in range(100):
    os.path.walk(r’D:\Share\mspt\MSDN’, ls, None)

zd = time.clock()

print y-x
print zd-z

raw_input()

#3.46223010829
#6.35496271671

#通过测试发现，方法1的速度快于方法2

#但是方法2的更加简单一些