CODEWITHSUNDEEP
pythongraphnetworkxnetwork-analysis
user3368526
user3368526

Reputation: 2328

Cannot create a directed graph using from_pandas_dataframe from networkx

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.

Upvotes: 23

Views: 22457

Answers (2)

Hamdi Tarek
Hamdi Tarek

Reputation: 141

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.

Upvotes: 12

Aric
Aric

Reputation: 25319

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())

Upvotes: 46

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