#检查是否相等cars = ["bmw", "audi", "toyota", "subaru"]for car in cars:if car == 'bmw':print(car.upper())else:print(car.title())#忽略大小写是否相等car = "Audi"if (car.lower() == "audi"):print(True)#检查是否不相等request_topping = 'mushrooms'if request_topping != 'anchovies':print("Hold the anchovies!")#多个条件age_0 = 22age_1 = 18if age_0 >= 21 and age_1 >= 21:print(f"and True")else:print(f"and False")if age_0 >= 21 or age_1 >= 21:print(f"or True")else:print(f"or False")#布尔表达式game_active = Truecan_edit = False#if-elif-elseage = 12if age < 4:print("You admission cost is $0.")elif age < 18:print("You admission cost is $25.")else:print("You admission cost is $40.")#确定列表不是空的request_topping = []if request_topping:for req in request_topping:print(req)else:print("Are you sure you want a plain pizza?")#使用多个列表available_toppings = ["mushrooms","olives","green peppers","pepperoni","pineapple","extra cheese"]request_topping = ["mushrooms","french fries","extra cheese"]for req in request_topping:if req in available_toppings:print(f"Adding {req}")else:print(f"Sorry, we don't have {req}")
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