Python超级超级简易计算器---Lambda匿名函数写法

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看小甲鱼的书看到了匿名函数，突然发现又可以写一个很简单的计算器

print("Python简易计算器--Lambda匿名函数写法...")
circle=input("请输入一个四则运算式子:")
if circle.find("+")!=-1:
    all=lambda infront,behind:infront+behind
    print(circle.partition("+")[0],"+",circle.partition("+")[2],"=",str(all(float(circle.partition("+")[0]),float(circle.partition("+")[2]))))
elif circle.find("*")!=-1:
    all=lambda infront,behind:infront*behind
    print(circle.partition("*")[0],"*",circle.partition("*")[2],"=",str(all(float(circle.partition("*")[0]),float(circle.partition("*")[2]))))
elif circle.find("-")!=-1:
    all=lambda infront,behind:infront-behind
    print(circle.partition("-")[0],"-",circle.partition("-")[2],"=",str(all(float(circle.partition("-")[0]),float(circle.partition("-")[2]))))
elif circle.find("/")!=-1:
    all=lambda infront,behind:infront/behind
    if circle.partition("/")[2]=="0":
        print("除数不能为零...程序即将报错停止")
        assert False
    print(circle.partition("/")[0],"/",circle.partition("/")[2],"=",str(all(float(circle.partition("/")[0]),float(circle.partition("/")[2]))))