day01_final

1、可以支持多个用户登录 (提示，通过字典存多个账户信息)。用户3次认证失败后，退出程序，

#!/usr/bin/env python3

dict = {
    'jack':{'pass':123,'count':0},
    'eray':{'pass':456,'count':0},
    'bike':{'pass':789,'count':0}
}


name = input ("plz input your name: ")
print (dict[name]['pass'])

if name not in dict:
    print ("Sorry,you input error.")
    exit()
elif name in dict :
    print ("Ok,you input success.")

    while dict[name]['count'] < 3:

        pas = int(input("plz input your passwd: "))

        if pas == dict[name]['pass']:
            print ("Congratulation to you.")
            dict[name]['count'] = 3
        else:
            dict[name]['count'] += 1

2、可以支持多个用户登录 (提示，通过列表存多个账户信息)

用户3次认证失败后，退出程序，再次启动程序尝试登录时，还是锁定状态（提示:需把用户锁定的状态存到文件里）

#!/usr/bin/env python3
#-*- coding:utf-8 -*-
#Author: Zhang Lei

userdict = {"enven":111,"jack":222,"eray":333,"bike":444}
count = 0
num = 0

while count < 3:
    username = input("What's your name? ")
    f = open("name.txt")
    date = f.readlines()
    date = ''.join(date).strip('\n')
    f.close()

    if username in date:
        print ("sorry,your account is blocked.")
        break
    else:
        if username not in userdict:
            print("no,you guess error...")
            count += 1
            continue
        elif username in userdict:
            print("year,input success...")

            while num < 3:
                passwd = input("plz input your passwd:")
                if passwd == str(userdict[username]):
                    print("Yes, congratulations to you...")
                    break
                elif num == 2:
                    print("You are locked:", username)
                    f = open('name.txt','a+')
                    f.write(username +'\n')
                    f.close
                    break
                else:
                    print("plz input your passwd again:")
                    num += 1

            break

 3、允许用户尝试3次， 每尝试3次后，如果还没猜对，就问用户是否还想继续玩，如果回答是Y 或y，则继续让其猜3次，一次往复，如果回答N或n，就退出程序，

如果猜对了，就直接退出。

#!/usr/bin/env python3
# -*- coding:utf-8 -*-
#Author: Zhang Lei

count = 0
user = "eray"

while count < 3:
    name = input("Plz guess name: ")
    if user == name:
        print("Contratulations. You got it.")
        break
    elif count == 2:
        guess = input("Do you want to guess again?\nplz input y/n\n")
        if guess == "Y" or guess == "y":
            print ("Let's go run...")
            count = 0
            continue
        elif guess == "N" or guess =='n':
            print("Sorry,Your guess is stoped.")
            break
        else:
            print("you input error.")
            break
    else:
        print ("Sorry,You guess error.")
    count += 1

　　

 上述例子采用标签的方式，如下：

#!/usr/bin/env python3
# -*- coding:utf-8 -*-
#Author: Zhang Lei

count = 0
user = "eray"
tag = True

while tag:
    name = input("Plz guess name: ")
    if user == name:
        print("Contratulations. You got it.")
        tag = False
    elif count == 2:
        guess = input("Do you want to guess again?\nplz input y/n\n")
        while tag:
            if guess == "Y" or guess == "y":
                print ("Let's go run...")
                count = 0
                break
            elif guess == "N" or guess =='n':
                print("Sorry,Your guess is stoped.")
                tag = False
            else:
               print("you input error.")
               tag = False
    else:
        print ("Sorry,You guess error.")
        count += 1