Re: [igraph] Loading graph from files

[Ahmed Abdeen Hamed]

Thank you!

I am getting this error:

>>> g = igraph.Graph.DictList(edges=reader)

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

TypeError: DictList() takes at least 3 arguments (2 given)

Here is how my file looks like:

source,target

tums,zantac

Thanks again!

-Ahmed

On Fri, Nov 15, 2013 at 2:02 PM, Tamás Nepusz <address@hidden> wrote:

Hi, I think csv is not directly supported, although probably only 3

lines of code after you have the edge list.

CSV files can probably be read with Python’s csv.DictReader class (from the CSV module) combined with igraph.Graph.DictList():

import csv

import igraph

reader = csv.DictReader(open(“file.csv”), dialect=“excel”)

g = igraph.Graph.DictList(edges=reader)

This assumes that the CSV file contains column headers and the columns named “source” and “target” contain the source and target vertex names. If your columns are named differently, use the edge_foreign_keys=… keyword argument of Graph.DictList.

— 

T.

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