Crash when edges are not initialised with a weight attribute

I am seeing the following crash when creating a Node2Vec object on a graph with no weights attribute on its edges:

Traceback (most recent call last):
  File "~/dev/pyiextract/graph.py", line 65, in <module>
    node2vec = Node2Vec(G, dimensions=64, walk_length=30, num_walks=200, workers=4)
  File "~/dev/pyiextract/venv/lib/python3.9/site-packages/node2vec/node2vec.py", line 73, in __init__
    self._precompute_probabilities()
  File "~/dev/pyiextract/venv/lib/python3.9/site-packages/node2vec/node2vec.py", line 125, in _precompute_probabilities
    ss_weight = weight * 1 / q
TypeError: unsupported operand type(s) for *: 'NoneType' and 'int'

If I initialise the edges with a weights attribute of 0.0, it seems to work. I can make a PR to assume 0.0 as a weight attribute if none exists however I want to understand what the intention is here, perhaps if this is expected an explicit error could be sent as an exception instead?

[eliorc]

Fixed in 0.4.6 (out on PyPI)

[8W9aG]

Both would be preferrable, I have a graph where nodes can be connected to other nodes via a link which is defined mainly by the connection attribute. For example “YYZ” -> “located in” -> “Toronto” and “YYZ” -> airport of -> “Toronto”.