import os,sys
path = "D:/ps-pdf2/"
# 获取该目录下所有文件，存入列表中
fileList = os.listdir(path)
n=11
while n<99 :
    oldname = "PyQt5快速开发与实战电子书-" + str(n + 1) + ".jpg"
    newname = "PyQt5快速开发与实战电子书-" + "0" + str(n + 1) + ".jpg"
    oldname2 = path + oldname
    newname2 = path + newname
    os.rename(oldname2, newname2)
    print(oldname2, newname2)
    n+=1