How to permanetly display the label of an edge

[ddrous]

I am aware that it is possible to hover over an edge to display its label following these steps. However, I would like said label to be displayed at all times. I read on an issue that one could include the label keyword when adding an edge to a graph, but it isn't working for me. I would like the MWE code below to show '5' on the indicated edge at all times. Thank you for any help.

from pyvis.network import Network
import networkx as nx

nx_graph = nx.cycle_graph(10)
nx_graph.nodes[1]['title'] = 'Number 1'
nx_graph.nodes[1]['group'] = 1
nx_graph.nodes[3]['title'] = 'I belong to a different group!'
nx_graph.nodes[3]['group'] = 10
nx_graph.add_node(20, size=20, title='couple', label='2', group=2)
nx_graph.add_node(21, size=15, title='couple', group=2)

nx_graph.add_edge(20, 21, weight=5, title='7', label='5')    ## How to display the label for this edge ?

nx_graph.add_node(25, size=25, label='lonely', title='lonely node', group=3)
nt = Network("500px", "500px", notebook=True)
nt.from_nx(nx_graph)
# nt.show_buttons(filter_=['physics'])
nt.show_buttons()
nt.show("nx.html")

[xhdix]

This code should work correctly. There was no problem in version 0.1.9, but in the new version, there is a problem. For an unknown and wrong reason, the tag of the previous version has been removed. Therefore, it is not possible to observe the changes and fix it very fast.

[xhdix]

okay, the origin of the problem is this PR: https://github.com/WestHealth/pyvis/pull/126 to fix it you need to change the code like this:

from pyvis.network import Network
import pyvis._version
import networkx as nx

nx_graph = nx.cycle_graph(10)
nx_graph.nodes[1]['title'] = 'Number 1'
nx_graph.nodes[1]['group'] = 1
nx_graph.nodes[3]['title'] = 'I belong to a different group!'
nx_graph.nodes[3]['group'] = 10
nx_graph.add_node(20, size=20, title='couple', label='2', group=2)
nx_graph.add_node(21, size=15, title='couple', group=2)

nx_graph.add_edge(20, 21, weight=5, title='7', label='5')    ## How to display the label for this edge ?

nx_graph.add_node(25, size=25, label='lonely', title='lonely node', group=3)
nt = Network("500px", "500px", notebook=True)
if pyvis._version.__version__ > '0.1.9':
    nt.from_nx(nx_graph, show_edge_weights=False)
else:
    nt.from_nx(nx_graph)
# nt.show_buttons(filter_=['physics'])
nt.show_buttons()
nt.show("nx.html")

[jgrimard]

FYI, for anyone coming across this in the future. Make sure your edge labels are type string. Float do not appear on the graph.

[ddrous]

Thank you. This solves my issue

[antshar]

If your graph is constructed from adjacency matrix, i.e all weights are known, here's a quick way to convert it to labels that are shown by pyvis

for edge, data in nx_graph.edges.items():
    data["label"] = str(data["weight"])