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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_edge(self, src_or_list, dst=None):
 """Retrieved an edge from the graph. Given an edge's source and destination the corresponding Edge instance(s) will be returned. If one or more edges exist with that source and destination a list of Edge instances is returned. An empty list is returned otherwise. """


        if isinstance( src_or_list, (list, tuple)) and dst is None:
            edge_points = tuple(src_or_list)
            edge_points_reverse = (edge_points[1], edge_points[0])
        else:
            edge_points = (src_or_list, dst)
            edge_points_reverse = (dst, src_or_list)

        match = list()

        if edge_points in self.obj_dict['edges'] or (
            self.get_top_graph_type() == 'graph' and
            edge_points_reverse in self.obj_dict['edges']):

            edges_obj_dict = self.obj_dict['edges'].get(
                edge_points,
                self.obj_dict['edges'].get( edge_points_reverse, None ))

            for edge_obj_dict in edges_obj_dict:
                match.append(
                    Edge(edge_points[0],
                         edge_points[1],
                         obj_dict=edge_obj_dict))

        return match