要求： 輸入用戶名密碼

　　 認證成功顯示歡迎信息

　　　輸錯三次以後鎖定

代碼如下：

# Author:YK
while(True):
    select=input(‘請問是註冊還是登錄‘)
    if select == ‘註冊‘:
        register=‘‘  #將需要保存的user和password放在register中
        username = input(‘please input your count...‘)
        password = input(‘please input your password...‘)
        register=register+username+‘,‘+password+‘\n‘
        file1 = open(‘D:\\study\\code\\study_teach\\day1\\save_user.txt‘, ‘a+‘,encoding=‘utf-8‘)
        #打開保存用戶名和密碼的文件
        file1.write(register)     #寫入文件
        file1.close()


    elif select == ‘登錄‘:
        username = input(‘please input your count...‘)
        file2 = open(‘D:\\study\\code\\study_teach\\day1\\lock.txt‘, ‘r‘, encoding=‘utf-8‘)
        #打開被鎖定用戶的文件
        count=0
        number=len(file2.readlines())   #獲取文件行數
        file2.seek(0, 0)   #將鼠標移動到首個字節
        while(count<number):
            count=count+1
            lines = file2.readline().strip(‘\n‘)  #獲取每一行的用戶名字符串
            if lines == username:    #判斷輸入的用戶名是否和存儲的用戶名相等
                print(‘Your count {name} locked‘.format(name=username))
                file2.close()
                exit()


        file1 = open(‘D:\\study\\code\\study_teach\\day1\\save_user.txt‘, ‘r‘,encoding=‘utf-8‘)
        #打開保存用戶名和密碼的文件
        for i in range(3):   #有3次機會輸入密碼的循環
            password = input(‘please input your password...‘)
            count = 0
            number = len(file1.readlines())  #獲取文件行數
            file1.seek(0,0)
            while (count < number):
                count=count+1
                line=file1.readline().strip(‘\n‘).split(‘,‘)
                if line[0] == username and line[1] == password:
                    print(‘Welcom to you submit‘)   #登錄成功
                    exit()  #退出
            if i == 2:   #3次均輸入錯誤
                file2 = open(‘D:\\study\\code\\study_teach\\day1\\lock.txt‘, ‘a+‘,encoding=‘utf-8‘)
                file2.write(username+‘\n‘)  #將被鎖定的用戶名寫入被鎖文件當中
                file1.close()
                file2.close()
                print(‘Your count {name} locked‘.format(name=username))
                exit()
    else:
        print(‘輸入有錯誤，請重新輸入‘)




 

python編寫登錄接口