Cannot create a directed graph using from_pandas_dataframe from networkx

Question

I'm learning networkx library and use twitter retweet directed graph data. I first read the datasets into pandas df (columns are 'from','to','weight') and wanted to put a first 300 rows(retweet) into a graph using below code:

tw_small = nx.from_pandas_dataframe(edges_df[:300],source='from',
                                   target='to',edge_attr=True)

I thought that it correctly created a graph but when I run tw_small.is_directed(), it says False(undirected graph) and I drew a graph using nx.draw() but it doesn't show the direction either.

Could someone help me find a correct way to make a directed graph?

Thanks.

score 44 · Accepted Answer · answered Jun 18 '17 at 17:06

44

Add the optional keyword argument create_using=nx.DiGraph(),

tw_small = nx.from_pandas_dataframe(edges_df[:300],source='from',
                                   target='to',edge_attr=True,
                                   create_using=nx.DiGraph())

answered Jun 18 '17 at 17:06

Aric

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Thank you. The syntax for the create_using agrument was not clearly explained in the documentation. – SummerEla Aug 10 '18 at 23:46
I know it's been a while, but `from_pandas_datafarme` has been deprecated, how would you do it with more current tools? – Ofek Glick Sep 27 '21 at 20:54
3

@OfekGlick, not sure if you're still looking for this, but you would use `from_pandas_edgelist`, so it would be `G = nx.from_pandas_edgelist(edges_df, source='from', target='to', edge_attr=True, create_using=nx.DiGraph())` (which is what the other solution below by Hamdi Tarek is saying). – user6386471 Nov 17 '21 at 14:01

score 12 · Answer 2 · edited Apr 30 '19 at 19:41

Instead of a dataframe you can write edgelist, it works for me, it shows me an error when I used from_pandas_dataframe : "AttributeError: module 'networkx' has no attribute 'from_pandas_dataframe"

Solution :

Graph = nx.from_pandas_edgelist(df,source='source',target='destination', edge_attr=None, create_using=nx.DiGraph())

You can test if your graph is directed or not using: nx.is_directed(Graph). You will get True.

Cannot create a directed graph using from_pandas_dataframe from networkx

2 Answers2

Solution :