# 一个简单的判断cars = ("bmw", "auto")for car in cars:if car == "auto":print(car)else:print("hello world")for car in cars:if car != "auto":print("hello world")else:print(car)for car in cars:if car != "Auto":print("hello world")else:print(car)age = 19if age == 19:print(age)if age > 10:print(age)if age < 20:print(age)if 1 < age and 1 < len(cars):print("你看看")if 1 < age or 1 < len(cars):print("你看那看")# 检查一个值是否在特定的列表中if "auto" not in cars:print("not")else:print("in here")if "auto" in cars:print("in here")# 判断列表是否为空if cars:print(cars)else:print("列表是空的")# 布尔表达式hello = Trueworld = Falseif hello:print("true")if world:print("true")else:print(world)
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