primitives.py 文件源码

def remove_node(graph, node_id):
    """Remove node.

    Parameters
    ----------
    graph : networkx.(Di)Graph
    node_id : hashable, node to remove.

    Raises
    ------
    GraphError
        If a node with the specified id does not exist.

    """
    if node_id in graph.nodes():
        neighbors = set(graph.__getitem__(node_id).keys())
        neighbors -= {node_id}
        graph.remove_node(node_id)
    else:
        raise GraphError("Node %s does not exist!" % str(node_id))
    return