FP option category in python

option.py

class Option(object):
    pass

class Some(Option):
    def __init__(self, value):
        if value is None:
            raise "Lol cant have some None"
        self.value = value
    def map(self, mapper):
        return Some(mapper(self.value))
    def __repr__(self):
        return "Some(%s)" % self.value

class Nothing(Option):
    def __init__(self):
        pass
    def map(self, mapper):
        return self
    def __repr__(self):
        return "Nothing"


im_some = Some([1,2,3,4])
im_none = Nothing()



print(im_some.map(lambda l: l * 2).map(lambda l: l + [2, 3]))
print(im_none.map(lambda l: l * 2).map(lambda l: l + [2, 3]))