python基础第一天 3.27

# #作业1
# 猜年龄，可以让用户猜三次！
age = 25
user_guess = int(input("input your guess"))

 

age = 25
count = 0
while count <3 :
    user_guess = int(input("please enter an age:"))
    if (user_guess == age):
        print ("Corrcet!")
        break
    elif (user_guess < age):
        print ("smaller!")
    else:
        print ("bigger!")
        count +=1

# #作业2
# 猜年龄，每隔三次，问他一下，还想不想玩，y,n

 

print("You have only 3 chances!")
age_of_oldboy = 56

count = 0
while count <3:
    guess_age = int(input("Guess Age:"))
    if guess_age == age_of_oldboy :
        print("Yes,you got it.")
        break
    elif guess_age > age_of_oldboy:
        print("Bigger!")
    elif guess_age < age_of_oldboy:
        print("Smaller!")
    count +=1
    if count == 3:
        countine_confirm = input("Do you want to contonue?")
        if countine_confirm !='n':
            count =0
        else:
            print("Log out!")

 

# #作业3
# 用户登录程序 ,编写登录接口
# 输入用户名密码
# 认证成功后显示欢迎信息
# 输错三次后锁定

 

法一：

import os

 

count = 1

name = "tom"

passwd = "123456"

while True:

    guess_name = input("please input your name: ")

    guess_passwd = input("please input your password: ")

    if guess_name == name and guess_passwd == passwd:

        print("welcome..")

        exit()

    elif count >= 3:

        os.system("sed -i '/tom/s/bin\/bash/sbin\/nologin/' /etc/passwd")

        with open('/etc/nologin.txt','w') as f:

            f.write("Your account is locked")

            f.close()

        print("Your account is locked...哈哈")

        exit()

    else:

        print("try agin..")

        count = count + 1

法二：
count = 0   #记录用户输入密码的次数
flag = 1    #标志位
lock = []
user_pass = []
username = input('please input your name:')

#读取黑名单的内容
f = open('black_mingdan','r')
lock_file = f.readlines()
f.close()
#将黑名单文件内容作为列表元素追加到列表中
for i in lock_file:
    line = i.strip('\n')
    lock.append(line)

#若输入的用户名在黑名单中，如果在则给出提示信息：用户已经被锁定，请联系管理员。
if username in lock:
    print('User %s Have Been Locked.It is not allow to login,please contact Administrator.' %username)
else:
#输入的用户名不在黑名单中，则提示用户输入密码信息
    while True:
        count += 1
        passwd = input("please input your password:")
        f = open('user_information','r')
        user_file = f.readlines()
        f.close()
        for i in user_file:
            user_pass = i.strip().split()
            #判断输入的用户名==user_pass[0] and 密码==user_pass[1],如果相等，则提示欢迎信息并退出循环，如果不相等则
            #结束本次循环
            if username == user_pass[0] and passwd == user_pass[1]:
                print('welcome user %s login !' %username)
                flag = True
                break
            else:
                continue
        #若flag为真，则用户名和密码输入正确跳出整个循环体，反之，若用户输入密码错误的次数为3，则给出提示信息：用户已经被锁定
        #并将username追加到黑名单中
        if flag is True:
            break
        else:
            if count == 3:
                print('User Have Been try 3 times,Have Been Locked')
                lock_file = open('black_mingdan','a')
                #lock_file.write('Have Been Locked User:%s\n' %username)
                lock_file.write('%s\n' %username)
                lock_file.close()
                break