Closure computation fails in Jupyter Notebooks

[willbakst]

Description

Not sure how feasible this is, but we should definitely work towards making it possible to use Lilypad inside of a Jupyter Notebook since many developers work there.

[koxudaxi]

@willbakst
I investigated this issue and found that implementing Jupyter Notebook support would be quite challenging.

The key technical issues:

1. When executing Closure.from_fn(fn)) in Jupyter Notebooks, it fails because code runs in __main__ as a virtual module.

2. While we can access the code and user namespace through module.In and module.get_ipython().user_ns, we can't get the source code. Our code uses inspect.getsource(getattr(self.module, node.id, None))) to extract source code from modules, but modules in Jupyter's user_ns don't provide source-related information like __code__ or __file__. This makes it impossible to extract the actual code for target objects.

To solve this, we would need to:

• Resolve referenced names (ast.Name) during AST traversal
• Extract corresponding code for those references

This would require either:

• Using third-party libraries for AST traversal
• Or implementing our own reference resolution table

Due to the complexity of these changes, I decided not to implement this solution at this time.

[willbakst]

Ok, let's put this on hold for the time being then. We can take a deeper look and evaluate later how much time we're willing to spend on this / possible other paths that could be easier to implement but sacrifice completeness.

My gut feeling is that we'll want to implement our own solution if feasible.