python例項1

例項

#系統輸入密碼錯誤3次就關閉系統
count = 0
flag = False
while count < 3:
    _name = input("username:")
    _psw = input("password:")
    f = open('users.txt','r')
    lines = f.readlines()
    for line in lines:
        index = line.index(',')
        name = line[0:index]
        password = line[index + 1:-1]
        # print(name,password)
        if _name == name and  _psw == password:
            flag = True
            break
        else:
            flag = False
    f.close()

    if flag:
        print("歡迎進入系統。。。。")
        break
    else:
        print("輸入的使用者或者密碼不正確。。。。")
        count +=1
else:
    print("你輸入的次數太多，系統關閉!")

users.txt中資料格式

0001,123

0002,452