Python超级超级简易计算器---Map映射写法

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一开始没效果，根据小甲鱼教程的map例子重复对了15分钟，最后自己发现要加一个*来解收集函数.....教程上没有....

print("Python简易计算器--Map映射写法")
circle=input("请输入一个四则运算式子:")
if circle.find("+")!=-1:
    print(circle.partition("+")[0],"+",circle.partition("+")[2],"=",*map(lambda infront,behind:infront+behind,[float(circle.partition("+")[0])],[float(circle.partition("+")[2])]))
if circle.find("-")!=-1:
    print(circle.partition("-")[0],"-",circle.partition("-")[2],"=",*map(lambda infront,behind:infront-behind,[float(circle.partition("-")[0])],[float(circle.partition("-")[2])])) 
if circle.find("*")!=-1:
    print(circle.partition("*")[0],"*",circle.partition("*")[2],"=",*map(lambda infront,behind:infront*behind,[float(circle.partition("*")[0])],[float(circle.partition("*")[2])]))
if circle.find("/")!=-1:
    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],"=",*map(lambda infront,behind:infront/behind,[float(circle.partition("/")[0])],[float(circle.partition("/")[2])]))