Fix getattr inference with empty annotation assignments

[cdce8p]

Description

Don't exit with AttributeInferenceError for annotation assignments if parent class contains valid assignment.

class Parent:
    attr: int = 2

class Child(Parent):
    attr: int

Type of Changes

	Type
✓	🐛 Bug fix

Related Issue

Refs pylint-dev/pylint#7631

[coveralls]

Pull Request Test Coverage Report for Build 3260984270

• 7 of 7 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0007%) to 92.272%

---

Totals
Change from base Build 3256664109:	0.0007%
Covered Lines:	9862
Relevant Lines:	10688

---

💛 - Coveralls

[DanielNoord]

Are you sure about this? I belive locals is actually SuccesfulInferenceResult but typed incorrectly currently...

[cdce8p]

I belive locals is actually SuccesfulInferenceResult but typed incorrectly currently...

Don't think so. AFAICT locals is only modified via set_local which takes a NodeNG argument. Thus the typing should be correct. We can always come back to it if we discover that it's wrong later.
https://github.com/PyCQA/astroid/blob/a29ee0f3fbbe3aa580280c979d3f01b0146dd00f/astroid/nodes/scoped_nodes/mixin.py#L91-L103

[DanielNoord]

See comment in other issue. This is not always the case and I think the typing should be updated here.

[Pierre-Sassoulas]

Elegant refactor and upgrade of the typing at the same time 👌