备份文件改进版

#-*- cording: utf-8 -*-
name = input("请输入您要保存的文件名称(包含后缀名)：")
position = name.rfind(".")
name1 = name[0:position]+"复件"+name[position:]
f = open(name,"r")
n = open(name1,"w")
while True:
    context = f.read(1024)
    if len(context)==0:
        break
    n.write(context)

f.close()
n.close()