unable to load a simple csv in networkx in Python

Question

I am a complete noobie in Python, and I would like to study a dataset using the networkx package. I do not understand what is wrong here:

I have a csv which looks li

Answer 1

nx.read_edgelist expects the first variable to be a file handle or filename string, not a csv.reader object.

Don't use csv at all; try just

G = nx.read_edgelist('nodes', delimiter=',', nodetype=int, encoding="utf-8")

Edit: if you need to skip a header line, you could do

with open('nodes', 'rb') as inf:
    next(inf, '')   # skip a line
    G = nx.read_edgelist(inf, delimiter=',', nodetype=int, encoding="utf-8")