CODEWITHSUNDEEP
pythonpython-2.7graphnodesnetworkx
Rich
Rich

Reputation: 1173

NetworkX tutorial gives key error over value selection

I'm working through a networkX tutorial, and page nine is this:

>>> g = nx . Graph ()
>>> g . add_node (1 , name = ‘ Obrian ’)
>>> g . add_nodes_from ([2] , name = ‘ Quintana ’ ])
>>> g [1][ ‘ name ’]
‘ Obrian ’

Which I reconstructed in code:

import networkx as nx

g = nx.Graph() 

g.add_node(1,name='Obrian')
g.add_nodes_from([2],name='Quintana')

print  "Node 1 name: " + g[1]['name']

And yet, for some reason, this simple 5-line script dosn't run:

Traceback (most recent call last):
  File "NetTest[nx_tut]--[P09].py", line 9, in <module>
    print  "Node 1 name: " + g[1]['name']
KeyError: 'name'

I feel like I'm missing something really obvious. What is it?

Upvotes: 1

Views: 1517

Answers (1)

Ryan Soklaski
Ryan Soklaski

Reputation: 550

You need to access the node property of the graph explicitly. That is, replace g[1]['name'] with g.node[1]['name']

You may be working from an out-of-date tutorial.

Upvotes: 5

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