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# fnss.topologies.topology.DirectedTopology.add_edges_from

`DirectedTopology.``add_edges_from`(ebunch, attr_dict=None, **attr)

  Add all the edges in ebunch.

  Parameters: | ebunch : container of edges Each edge given in the container will be added to the graph. The edges must be given as as 2-tuples (u,v) or 3-tuples (u,v,d) where d is a dictionary containing edge data. attr_dict : dictionary, optional (default= no attributes) Dictionary of edge attributes. Key/value pairs will update existing data associated with each edge. attr : keyword arguments, optional Edge data (or labels or objects) can be assigned using keyword arguments.

  See also

  `add_edge`
    add a single edge
  `add_weighted_edges_from`
    convenient way to add weighted edges

  Notes

  Adding the same edge twice has no effect but any edge data will be updated when each duplicate edge is added.

  Edge attributes specified in edges as a tuple take precedence over attributes specified generally.

  Examples

      >>> G = nx.Graph()   # or DiGraph, MultiGraph, MultiDiGraph, etc
      >>> G.add_edges_from([(0,1),(1,2)]) # using a list of edge tuples
      >>> e = zip(range(0,3),range(1,4))
      >>> G.add_edges_from(e) # Add the path graph 0-1-2-3

  Associate data to edges

      >>> G.add_edges_from([(1,2),(2,3)], weight=3)
      >>> G.add_edges_from([(3,4),(1,4)], label='WN2898')

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