Method remove_edges_from

easygraph/classes/multigraph.py:344–382

Remove all edges specified in ebunch. Parameters ---------- ebunch: list or container of edge tuples Each edge given in the list or container will be removed from the graph. The edges can be: - 2-tuples (u, v) All edges between u and

(self, ebunch)

                del self._adj[v][u]

    def remove_edges_from(self, ebunch):
        """Remove all edges specified in ebunch.

        Parameters
        ----------
        ebunch: list or container of edge tuples
            Each edge given in the list or container will be removed
            from the graph. The edges can be:

                - 2-tuples (u, v) All edges between u and v are removed.
                - 3-tuples (u, v, key) The edge identified by key is removed.
                - 4-tuples (u, v, key, data) where data is ignored.

        See Also
        --------
        remove_edge : remove a single edge

        Notes
        -----
        Will fail silently if an edge in ebunch is not in the graph.

        Examples
        --------
        Removing multiple copies of edges

        >>> G = eg.MultiGraph()
        >>> keys = G.add_edges_from([(1, 2), (1, 2), (1, 2)])
        >>> G.remove_edges_from([(1, 2), (1, 2)])
        >>> list(G.edges())
        [(1, 2)]
        >>> G.remove_edges_from([(1, 2), (1, 2)])  # silently ignore extra copy
        >>> list(G.edges)  # now empty graph
        []
        """
        for e in ebunch:
            try:
                self.remove_edge(*e[:3])
            except EasyGraphError:
                pass

    def has_edge(self, u, v, key=None):
        """Returns True if the graph has an edge between nodes u and v.