2021-08-26 Python之图书管理系统

#图书管理系统

#持久化保存：文件

#用户注册
def register():
    username=input('输入用户名：')
    password=input('输入密码：')
    repassword=input('输入确认密码：')

    if password==repassword:
        #保存信息
        with open (r'e:\book\users.txt','a') as wstream:
            wstream.write('{} {}\n'.format(username,password))

        print('用户注册成功')
    else:
        print('密码不一致')

#用户登录
def login():
    username=input('输入用户名：')
    password=input('输入密码：')

    if username and password:
        with open(r'e:\book\users.txt') as rstream:
            while True:
                user=rstream.readline()
                if not user:
                    print('用户名或密码输入有误')
                    break
                
                input_user='{} {}\n'.format(username,password)

                if user==input_user:
                    print('用户登录成功')
                    break


#展示图书

def show_books():
    print('----------图书馆的图书----------')
    with open(r'e:\book\books.txt') as rstream:
        books=rstream.readlines()
        for book in books:
            print(book,end='')
            
#register()
login()
show_books()