Promoted getattr() from FunctionDef to Lambda

[jacobtylerwalls]

Steps

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Description

Type of Changes

	Type
✓	✨ New feature

Related Issue

Lambdas can have special attributes, such as __code__, or even arbitrary attributes. Attempting to use getattr on the scoped_nodes.Lambda instance, though, raised AttributeError.

Now, it won't: the PR promotes getattr() from FunctionDef to its parent, Lambda.

Discovered by pylint's primer tests during an attempt to remove an except: AttributeError from pylint's TypeChecker, discussed here.

[DanielNoord]

Just adding some typing while we're at it 😄

Nice that that test suddenly works 👍

Edit: Btw, not sure if you have done this, but we might want to do a quick search in the open issues on pylint and astroid to see if that inference change for lambda's does not fix anything else .

[DanielNoord]

We could consider this a bug fix and test @Pierre-Sassoulas's new release process 😄 Considering the fact that this is breaking in the pylint primer and we're handling the bug (and we're inferring more than we previously did), there is an argument to be made to do so. I'll leave that to the others though.

We would only need to change the position of the changelog entry.

Thanks @jacobtylerwalls 👍

[jacobtylerwalls]

Makes sense. But to be clear, it's not urgent -- nothing is blocking pylint -- we were just exploring whether we could remove an except case in pylint while working on pylint-dev/pylint#5544. However, at this point, any changes would be better off in a new PR with pylint regression tests.

[Pierre-Sassoulas]

LGTM. Let's put this in 2.11.1 changelog :)