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#猜年龄大小，用户最多猜三次
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age = 50
i = 0
while i < 3:
guess_age = int(input("Please input your answer:"))
if guess_age > age:
print("too big...try again please")
elif guess_age < age:
print("too small...try again please")
else:
print("You guessed it!")
break
i += 1
if i == 3:
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#猜年龄，每隔三次询问是否继续玩
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age = 50
for i in range(1,100):
guess_age = int(input("Please input your answer:"))
if guess_age > age:
print("too big...try again please")
elif guess_age < age:
print("too small...try again please")
else:
print("You guessed it !")
if i%3 == 0:
choice = input("Would you like play again? yes or no")
if choice == "yes":
continue
if choice == "no":
break
else:
continue
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#登录验证，输入错误三次锁定用户
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f = open('c:/user_passwd.txt','r')
j = 3
system_user_name = str(f.readline())
system_passwd = str(f.readline())
f.close()for i in range(1,5):
user_name = str(input("Please input your UserID:"))
password = str(input("passwd:"))
if i == 3:
s = open('c:/user_passwd.txt', 'r+')
s.write("\nlocked")
s.close()
print("This user is locked!")
break
else:
if user_name + '\n' == system_user_name and password == system_passwd:
print("Welcome" + user_name + '\n' + "Have a good time!")
break
else:
j -= 1
i += 1
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print("UserID or password is wrong,Please try once again and you have " + \ str(j) + 'times choice')
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本文转自 AltBoy 51CTO博客，原文链接:http://blog.51cto.com/altboy/1911078