__repr__ of HamiltonNode is hard to read

[zilto]

Printing an HamiltonNode in the terminal or in a notebook cell returns node_name: node_type. While this is helpful, it has limitations.

• it lacks quotation marks "node_name": "node_type" making it's difficult and unintuitive to read lists e.g., HamiltonGraph.nodes. You would get

  [A: int, B: float, C: str]

• it should declare it's Python type

Ideally, a __repr__ string is a string that you could copy-paste to instantiate the object e.g., HamiltonNode("node_name", ...). Given the lengthy declaration, I propose instead f"HamiltonNode("{self.name}", {self.type})"
For example

[HamiltonNode("A", int), HamiltonNode("B", float), HamiltonNode("C", str)]