Method add_edges

easygraph/classes/graph.py:862–913

Add a list of edges. Parameters ---------- edges_for_adding : list of 2-element tuple The edges for adding. Each element is a (u, v) tuple, and u, v are two ends of the edge. edges_attr : list of dict, optional The corresponding a

(self, edges_for_adding, edges_attr: List[Dict] = [])

        self._clear_cache()

    def add_edges(self, edges_for_adding, edges_attr: List[Dict] = []):
        """Add a list of edges.

        Parameters
        ----------
        edges_for_adding : list of 2-element tuple
            The edges for adding. Each element is a (u, v) tuple, and u, v are
            two ends of the edge.

        edges_attr : list of dict, optional
            The corresponding attributes for each edge in *edges_for_adding*.

        Examples
        --------
        Add a list of edges into *G*

        >>> G.add_edges([
        ...     (1, 2),
        ...     (3, 4),
        ...     ('Jack', 'Tom')
        ... ])

        Add edge with attributes, for example, edge weight,

        >>> G.add_edges([(1,2), (2, 3)], edges_attr=[
        ...     {
        ...         'weight': 20
        ...     },
        ...     {
        ...         'weight': 15
        ...     }
        ... ])

        """
        if edges_attr is None:
            edges_attr = []
        if not len(edges_attr) == 0:  # Edges attributes included in input
            assert len(edges_for_adding) == len(
                edges_attr
            ), "Edges and Attributes lists must have same length."
        else:  # Set empty attribute for each edge
            edges_attr = [dict() for i in range(len(edges_for_adding))]

        for i in range(len(edges_for_adding)):
            try:
                edge = edges_for_adding[i]
                attr = edges_attr[i]
                assert len(edge) == 2, "Edge tuple {} must be 2-tuple.".format(edge)
                self._add_one_edge(edge[0], edge[1], attr)
            except Exception as err:
                print(err)
        self._clear_cache()

    def add_edges_from(self, ebunch_to_add, **attr):
        """Add all the edges in ebunch_to_add.