Python超级超级简易计算器---decorator装饰器写法

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print("Python简易计算器--decorator")
circle=input("请输入一个四则运算式:")
def all(function):
    def get():
        function()
    return get
@all
def start():
    if circle.partition("+")[0]!=circle:
        infront=circle.partition("+")[0]
        behind=circle.partition("+")[2]
        print(infront,"+",behind,"=",str(float(infront)+float(behind)))
    elif circle.partition("*")[0]!=circle:
        infront=circle.partition("*")[0]
        behind=circle.partition("*")[2]
        print(infront,"*",behind,"=",str(float(infront)*float(behind)))
    elif circle.partition("-")[0]!=circle:
        infront=circle.partition("-")[0]
        behind=circle.partition("-")[2]
        print(infront,"-",behind,"=",str(float(infront)-float(behind)))
    elif circle.partition("/")[0]!=circle:
        infront=circle.partition("/")[0]
        behind=circle.partition("/")[2]
        if behind=="0":
            print("除数不能为零...程序即将报错停止")
            assert False
        print(infront,"/",behind,"=",str(float(infront)/float(behind)))
start()

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