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# fnss.topologies.topology.DirectedTopology.in_edges_iter

`DirectedTopology.``in_edges_iter`(nbunch=None, data=False)

  Return an iterator over the incoming edges.

  Parameters: | nbunch : iterable container, optional (default= all nodes) A container of nodes. The container will be iterated through once. data : bool, optional (default=False) If True, return edge attribute dict in 3-tuple (u,v,data).
  Returns: | in_edge_iter : iterator An iterator of (u,v) or (u,v,d) tuples of incoming edges.

  See also

  `edges_iter`
    return an iterator of edges

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