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# fnss.topologies.topology.Topology.get_edge_data

`Topology.``get_edge_data`(u, v, default=None)

  Return the attribute dictionary associated with edge (u,v).

  Parameters: | u,v : nodes default: any Python object (default=None) : Value to return if the edge (u,v) is not found.
  Returns: | edge_dict : dictionary The edge attribute dictionary.

  Notes

  It is faster to use G[u][v].

      >>> G = nx.Graph()   # or DiGraph, MultiGraph, MultiDiGraph, etc
      >>> G.add_path([0,1,2,3])
      >>> G[0][1]
      {}

  Warning: Assigning G[u][v] corrupts the graph data structure. But it is safe to assign attributes to that dictionary,

      >>> G[0][1]['weight'] = 7
      >>> G[0][1]['weight']
      7
      >>> G[1][0]['weight']
      7

  Examples

      >>> G = nx.Graph()   # or DiGraph, MultiGraph, MultiDiGraph, etc
      >>> G.add_path([0,1,2,3])
      >>> G.get_edge_data(0,1) # default edge data is {}
      {}
      >>> e = (0,1)
      >>> G.get_edge_data(*e) # tuple form
      {}
      >>> G.get_edge_data('a','b',default=0) # edge not in graph, return 0
      0

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