Cannot create a directed graph using from_pandas_dataframe from networkx

python graph networkx network-analysis
user3368526 picture user3368526 · Jun 18, 2017 · Viewed 7.5k times · Source

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.

Answer

Aric picture Aric · Jun 18, 2017

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())

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