python文件操作

import os

def (path):
    global count;
    if not os.path.isfile(path) and not os.path.isdir(path):
        return False;

    if os.path.isfile(path):
        filepath = os.path.split(path)
        filename = os.path.splitext(filepath[-1])
        file_ext = filename[-1]

        if file_ext == '.txt':
            os.rename(path, filepath[0]+'/'+'ex_'+str(count)+file_ext)
            count += 1

    elif os.path.isdir(path):
        for x in os.listdir(path):
            change_name(os.path.join(path, x))


count = 1
file_dir = 'C:/Users/lansheng/Desktop/py'
change_name(file_dir)

import os
import hashlib
from time import clock as now


def getmd5(filename):
    file_txt = open(filename, 'rb').read()
    md5 = hashlib.md5()
    md5.update(file_txt)

    return md5.hexdigest()


path = '.'
all_md5 = []
total_file = 0
delete_file = 0


def del_dump(path):
    global total_file
    global delete_file

    for parent, dirnames, filenames in os.walk(path):
        for filename in filenames:
            total_file += 1
            real_path = os.path.join(parent, filename)
            

            filemd5 = getmd5(real_path)
            if filemd5 in all_md5:
                delete_file += 1
                #do delete
                os.remove(real_path)
                print 'remove:',real_path

            else:
                all_md5.append(filemd5)

def del_emptydir(path):
    if os.path.isdir(path):
        for p in os.listdir(path):
            d = os.path.join(path, p)
            if(os.path.isdir(d) == True):
                del_emptydir(d)					#recursive
    if not os.listdir(path):
        os.rmdir(path)
        print 'remove dir:', path
	

start = now()

del_dump(path)
#del_emptydir(path)

end = now()

time_last = end - start

print 'total file: ', total_file
print 'delete file: ', delete_file
print 'cost time: ', time_last, 's'