Return an iterator for the nodes.
Notes
It is simpler and equivalent to use the expression “for n in G”
>>> G=nx.path_graph(3)
>>> for n in G:
... print n,
0 1 2
Examples
>>> G=nx.path_graph(3)
>>> for n in G.nodes_iter():
... print n,
0 1 2
You can also say
>>> G=nx.path_graph(3)
>>> for n in G:
... print n,
0 1 2