Merge pull request #93 from Kelvinrr/func

        """

        _, self.clusters = func(self, *args, **kwargs)

    def apply_func_to_edges(self, func, *args, graph_mask_keys=[], **kwargs):

    def apply_func_to_edges(self, function, *args, graph_mask_keys=[], **kwargs):

        """

        Iterates over edges using an optional mask and and applies the given function.

        If func is not an attribute of Edge, raises AttributeError

        Parameters

        ----------

        func : string

        function : obj

                   function to be called on every edge

        graph_mask_keys : list

                          of keys in graph_masks

        else:

            edges_to_iter = self.edges()

        if not isinstance(func, str):

            func = func.__name__

        if not isinstance(function, str):

            function = function.__name__

        for s, d in edges_to_iter:

            curr_edge = self.get_edge_data(s, d)

            try:

                function = getattr(curr_edge, func)

                func = getattr(curr_edge, function)

            except:

                raise AttributeError(func, ' is not an attribute of Edge')

                raise AttributeError(function, ' is not an attribute of Edge')

            else:

                function(*args, **kwargs)

                func(*args, **kwargs)

    def minimum_spanning_tree(self):

        """