Networkx : Convert multigraph into simple graph with weighted edges

Question

I have a multigraph object and would like to convert it to a simple graph object with weighted edges. I have looked through the networkx documentation and can\'t seem to fin

Answer 1

Here is one way to create a weighted graph from a weighted multigraph by summing the weights:

import networkx as nx
# weighted MultiGraph
M = nx.MultiGraph()
M.add_edge(1,2,weight=7)
M.add_edge(1,2,weight=19)
M.add_edge(2,3,weight=42)

# create weighted graph from M
G = nx.Graph()
for u,v,data in M.edges(data=True):
    w = data['weight'] if 'weight' in data else 1.0
    if G.has_edge(u,v):
        G[u][v]['weight'] += w
    else:
        G.add_edge(u, v, weight=w)

print(G.edges(data=True))
# [(1, 2, {'weight': 26}), (2, 3, {'weight': 42})]