Lattice does not support all rustworkx graph representations.

[MarcoBarroca]

Environment

• Qiskit Nature version: 0.7.2
• Python version: 3.11
• Operating system: Mac OS ARM

What is happening?

When creating a Lattice from a rustworkx graph Lattice() only supports graphs of the form

graph = rx.PyGraph(multigraph=False)
graph.extend_from weighted_edge_list(
    [(0, 1, 1), (0, 2, 2),
     (1, 3, 2), (3, 0, 3)])

rustworkx support two types of weighted graph representations. The above or

graph = rx.PyGraph(multigraph=False)
graph.extend_from weighted_edge_list(
    [(0, 1, {'weight': 1}), (0, 2, {'weight': 2}),
     (1, 3, {'weight': 2}), (3, 0, {'weight': 3})])

Using the second one results in

ValueError: Unsupported weight {'weight': 1} on edge with index 0.

How can we reproduce the issue?

This should reproduce it with the necessary imports:

graph = rx.PyGraph(multigraph=False)
graph.extend_from_weighted_edge_list(
    [(0, 1, {'weight': 1}), (0, 2, {'weight': 2}),
     (1, 3, {'weight': 2}), (3, 0, {'weight': 3})])

lattice = Lattice(graph)

What should happen?

A lattice should be constructed given a rustworkx graph in any of the two forms.

Any suggestions?

Either modify lattice.py to take both into account or modify the graph object to be of the correct format.