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classProduct:def__init__(self,name,price):self.name=nameself.price=pricedefget_price(self):returnself.priceclassShoppingCart:def__init__(self):self.items=defadd_product(self,product):self.items.append(product)defremove_product(self,product):ifproductinself.items:self.items.remove(product)defcalculate_total(self):total=sum(product.get_price()forproductinself.items)returntotalclassUser:def__init__(self,name):self.name=nameself.cart=ShoppingCart()defadd_to_cart(self,product):self.cart.add_product(product)defremove_from_cart(self,product):self.cart.remove_product(product)defget_total(self):returnself.cart.calculate_total()#ʹÓÃʾÀýproduct1=Product("µçÄÔ",3000)product2=Product("ÊÖ»ú",2000)product3=Product("¶ú»ú",500)user=User("ÕÅÈý")user.add_to_cart(product1)user.add_to_cart(product2)print(f"¹ºÎï³µ×ܼÛÇ®£º{user.get_total()}Ôª")user.remove_from_cart(product2)print(f"ÒÆ³ýÊÖ»úºóµÄ¹ºÎï³µ×ܼÛÇ®£º{user.get_total()}Ôª")
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classUserLoginSystem:def__init__(self,username,password):self.username=usernameself.password=passworddefvalidate_credentials(self):ifnotself.usernameornotself.password:returnFalsereturnself.check_password()andself.check_username()defcheck_password(self):#¼òÆÓµÄ?ÃÜÂëУÑéÂß¼returnself.password=="password123"defcheck_username(self):#¼òÆÓµÄÓû§ÃûУÑéÂß¼returnself.username=="user123"deflogin(self):ifself.validate_credentials():print("µÇ¼ÀÖ³É")else:print("µÇ¼ʧ°Ü£¬Çë¼ì²éÓû§ÃûºÍÃÜÂë")#ʹÓÃʾÀýlogin_system=UserLoginSystem("user123","password123")login_system.login()
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