python学习第一课
2021-07-04 08:05
标签:amp 实现 span dict 账号密码 += 一课 break style 第一步,实现 输入账号密码,显示账号欢迎: 第二步,判断账号密码是否正确: 第三步,利用表,判断账号是否存在,且密码正确: 第四步,限制只能输入三次: 第五步,限制同一账号,只能输入错误3次,超出退出程序: 第六步:限制同一账号,只能输入错误3次,限制所有错误5次,超出退出程序: python学习第一课 标签:amp 实现 span dict 账号密码 += 一课 break style 原文地址:https://www.cnblogs.com/RayPy/p/9614016.htmlusername = input("username :")
password = int(input("password :"))
print("welcome ",username,"!!!!!!!!!")
userlist1=["a",123]
username = input("username :")
password = int(input("password :"))
if (username == userlist1[0]) & (password==userlist1[1]):
print("welcome ",username,"!!!!!!!!!")
else:print("erro")
dict = {‘a‘: 123, ‘b‘: 234};
username = str(input("username :"))
password = int(input("password :"))
if (dict.__contains__(username)) & (password == dict.get(username)):
print("welcome ", username, "!!!!!!!!!")
else:
print("erro")
dict = {‘a‘: 123, ‘b‘: 234};
count=0
while count :
username = input("username :")
password = int(input("password :"))
if (dict.__contains__(username)) & (password == dict.get(username)):
print("welcome ",username,"!!!!!!!!!")
break
else:
print("您已输入错误",count+1,"次,输入错误3次锁定")
count += 1
dict = {‘a‘: 123, ‘b‘: 234};
count=0
errolist=[]
while count :
username = str(input("username :"))
errolist.append(username)
password = int(input("password :"))
if ( dict.__contains__( username) ) & (password==dict.get(username)):
print("welcome ",username,"!!!!!!!!!")
break
else:
print("您已输入错误",errolist.count(username),"次,输入错误3次锁定")
count = errolist.count(username)
dict = {‘a‘: 123, ‘b‘: 234,‘c‘:456};
count=0
errolist=[]
blacklist=[]
while count :
username = str(input("username :"))
errolist.append(username)
password = int(input("password :"))
if (blacklist.count(username)):
if ( dict.__contains__( username) ) & (password==dict.get(username)):
print("welcome ",username,"!!!!!!!!!")
break
else:
print("您已输入错误",errolist.count(username),"次,输入错误3次锁定")
blacklist.append(username)
count +=1
print(count)
if (count == 5) :
print("您尝试错误5次,程序将退出")
break
else:print("您已输入错误3次锁定")