Add a notebook to explore sub-networks

[ekatef]

A simple notebook which may be useful to explore topology of isolated sub-networks.

[ekatef]

@davide-f would you have time to review it? The idea is to have a simple tool which can be used to check topology of the resulted grid model.

[davide-f]

Very nice! @ekatef :D
And quite useful for the PRs on the isolated network ones :)

The general perspective is that they are clear and the code is ok as is in my opinion, I would only add some text to describe what is being done.

I was wondering if rather than creating a new notebook, we may revise an existing one.
For example, base_network seemed a good candidate, what is your opinion?

[ekatef]

Very nice! @ekatef :D And quite useful for the PRs on the isolated network ones :)

The general perspective is that they are clear and the code is ok as is in my opinion, I would only add some text to describe what is being done.

I was wondering if rather than creating a new notebook, we may revise an existing one. For example, base_network seemed a good candidate, what is your opinion?

Thanks a lot for reviewing @davide-f! Agree by all the points :) base_network seems to be an excellent match for this exercise. Happy to add these plots there.

Would you mind to keep this PR open in meantime? The scripts are pretty useful for quick investigation of the network topology, and sometimes I'm using this PR to quickly share the approach. (I'll do my best to avoid making this meantime getting too long!)

[davide-f]

No problem :) we can definitely keep it open!