[RFC] Yield self when inferring GeneratorExp

[jacobtylerwalls]

Description

import astroid
code = """
def get_generator():
    return (x for x in range(0))
x = get_generator()  #@
if x:
  pass
"""
x = astroid.extract_node(code)
x.value.inferred()

Before: [Uninferable]
Now: [<GeneratorExp l.3 at 0x103e80880>]

Type of Changes

	Type
✓	✨ New feature

Related Issue

See pylint-dev/pylint#6909 (comment)

[coveralls]

Pull Request Test Coverage Report for Build 2480208453

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.003%) to 92.236%

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Totals
Change from base Build 2480015245:	0.003%
Covered Lines:	9362
Relevant Lines:	10150

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💛 - Coveralls

[Pierre-Sassoulas]

Looks good, but looking at the pipeline it seems we're going to get crashes in code that never had to deal with generator expressions before and only handle Uninferable right now.

[jacobtylerwalls]

Yeah, I was looking at that. Most of the other uses of pytype() in pylint are guarded against there being no pytype, there's even a util for it. That one place could be changed to use that util.

However, I realize this is falling afoul of the same issue in #1475 (comment), so I'll be closing. There should be another way in pylint to deal with pylint-dev/pylint#6909 (comment).