#coding:utf8import os,timedirectory = "d:/scrapy tutorial/"t = []d = {}for filename in os.listdir(directory):        path = directory + filename        time1 = time.ctime(os.path.getmtime(path))        d[time1] = filename        t.append(time1)n = 1for i in sorted(t):        fn = directory + d[i]        new_fn = directory + str(n) + ‘. ‘ + d[i]##        if n<10:##                new_fn = directory + d[i][1:]##        else:##                new_fn = directory + d[i][2:]        os.rename(fn, new_fn)        n += 1