class myFloat1(float):
    def __add__(self, value):
        if type(value) is str:
            return self.__class__(float(self) + float(value))
        else:
            return self.__class__(float(self) + value)
 
    def __radd__(self, value):
        return self.__add__(value)
 
class myFloat2(float):
    pass
 
class myFloat3(myFloat1):
    def __radd__(self, value):
        return self.__add__(value + 10000)
 
x = myFloat1(1.0)
y = myFloat2(2.0)
z = myFloat3(3.0)
o, p, q = '4.0' + x + y + '5.0', y + x, x + z
print(o, type(o))
print(p, type(p))
print(q, type(q))
 

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