Runtime Error With Networkx : Dictionary Changed During Iteration While Running A Neural Gas Script

I am trying to run a neural gas network with an older script that doesn't work well with networkx 2 so I modified some things. However I am getting the error : Dictionary changed s

Solution 1:

Here you're looping through the edges of the graph:

for u, v, attributes in self.network.edges(data=True):

But within that loop you modify the edges. So self.network.edges (which is fundamentally a dictionary) is changing while you're iterating. This isn't allowed by python.

A solution to this is to predefine

edgelist = list(self.network.edges(data=True))

then do

for u, v, attributes in edgelist: