Elegant access to edge attributes in networkx

Use data=True:

import networkx as nx

G = nx.Graph()
G.add_edge(1, 2, weight=4.7)
G.add_edge(3, 4, weight=5.8)

for node1, node2, data in G.edges(data=True):
    print(data['weight'])

prints

4.7
5.8

In NetworkX 2.4 you can also use graph.edges.data().

So in this case:

import networkx as nx

G = nx.Graph()
G.add_edge(1, 2, weight=4.7)
G.add_edge(3, 4, weight=5.8)

for node1, node2, data in G.edges.data():
    print(data['weight'])

The output is

4.7
5.8