Slow comparison between two lists

[Hrvoje Niksic]

bearophileHUGS at lycos.com writes:

>> internal = set(list_internal)
> ...
>
> To do that the original poster may have to define a __hash__ and
> __eq__ methods in his/her class.

You're right.  The OP states he implements __eq__, so he also needs a
matching __hash__, such as:

    def __hash__(self, other):
        return (hash(self.xcoord) ^ hash(self.ycoord) ^
                hash(self.streetname) ^ hash(self.streetno))