[EMAIL PROTECTED] 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)) -- http://mail.python.org/mailman/listinfo/python-list