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   源码介绍

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#!/usr/bin/python
width = 80
title = "Welcome to Hero alliance"
len_width = len(title)
margin_width = (width - len_width - 2 )  // 2

print ('*' * width)
print ('*' * margin_width   ' '   title   ' '   '*' * margin_width)
print ('*' * width)

while True:
	inputa = input("Please input your username: ")
	if inputa == 'RM':
		password = input("Please input your password: ")
		p = '123'
		while password != p:
			print ("Wrong password")
			password = input("Please input your password again: ")
		else:
			print (title)
			break
	else:
		print ("Sorry, user %s not found" % inputa)