This documents an unmaintained version of NetworkX. Please upgrade to a maintained version and see the current NetworkX documentation.


Graph.add_edges_from(ebunch, attr_dict=None, **attr)[source]

Add all the edges in ebunch.

  • 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 a single edge
convenient way to add weighted edges


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 take precedence over attributes specified generally.


>>> 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')