Method remove_edge

networkx/classes/graph.py:1118–1150

Remove the edge between u and v. Parameters ---------- u, v : nodes Remove the edge between nodes u and v. Raises ------ NetworkXError If there is not an edge between u and v. See Also -------- remove_

(self, u, v)

        nx._clear_cache(self)

    def remove_edge(self, u, v):
        """Remove the edge between u and v.

        Parameters
        ----------
        u, v : nodes
            Remove the edge between nodes u and v.

        Raises
        ------
        NetworkXError
            If there is not an edge between u and v.

        See Also
        --------
        remove_edges_from : remove a collection of edges

        Examples
        --------
        >>> G = nx.path_graph(4)  # or DiGraph, etc
        >>> G.remove_edge(0, 1)
        >>> e = (1, 2)
        >>> G.remove_edge(*e)  # unpacks e from an edge tuple
        >>> e = (2, 3, {"weight": 7})  # an edge with attribute data
        >>> G.remove_edge(*e[:2])  # select first part of edge tuple
        """
        try:
            del self._adj[u][v]
            if u != v:  # self-loop needs only one entry removed
                del self._adj[v][u]
        except KeyError as err:
            raise NetworkXError(f"The edge {u}-{v} is not in the graph") from err
        nx._clear_cache(self)

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