Construct graph from data file

Question

I have a text file with data as below: A D 15 B A 11 C H 2 . . . . . .

I read data using Dataframe in Python. Then I want to create a graph with vertices in columns 1 & 2 and column 3 is the weight.

How can I create a graph from the data? Thank you!

You want to plot a graph or store it in a variable? Look for NetworkX library. — Serenity
– Serenity, Commented Apr 10, 2017 at 11:42
@Dadep : How is that even distantly connected to the question? — Peaceful
– Peaceful, Commented Apr 10, 2017 at 16:39

SanjeethBoddi · Accepted Answer · 2019-08-30 14:16:18Z

1

Here's a quick example using networkx:

import networkx as nx

node_list = list(set(list(df['col1']) + list(df['col2'])))  
data = [tuple(x) for x in df.values.tolist()]
# [('A', 'D', 15), ('B', 'A', 11), ('C', 'H', 2), . . .]

G = nx.Graph()
G.add_nodes_from(node_list)
G.add_weighted_edges_from(data)

edited Aug 30, 2019 at 14:16

SanjeethBoddi

10510 bronze badges

answered Apr 10, 2017 at 16:29

brennan

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