8000 gh-116022: Improve `repr()` of AST nodes by tomasr8 · Pull Request #117046 · python/cpython · GitHub
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gh-116022: Improve repr() of AST nodes #117046

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Merged
merged 39 commits into from
Sep 18, 2024
Merged

gh-116022: Improve repr() of AST nodes #117046

merged 39 commits into from
Sep 18, 2024

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tomasr8
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@tomasr8 tomasr8 commented Mar 19, 2024 •
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closes #116022

Based on the original issue the new repr() has:

  • limited depth: nodes which are to deep are represented as Node(...)
  • compressed list/tuple fields (e.g. body): more than 2 items are shown as [repr(first), ..., repr(last)]

Examples (output is formatted to be more readable):

>>> import ast
>>> ast.parse("x = 3")
Module(
    body=[Assign(targets=[Name(...)], value=Constant(...), type_comment=None)],
    type_ignores=[]
)


>>> ast.parse('x=7; y=4; c,z=3,4')
Module(
    body=[
        Assign(targets=[Name(...)], value=Constant(...), type_comment=None),
        ...,
        Assign(targets=[Tuple(...)], value=Tuple(...), type_comment=None)
    ],
    type_ignores=[]
)


>>> from pathlib import Path
>>> import typing
>>> ast.parse(Path(typing.__file__).read_text())
Module(
    body=[
        Expr(value=Constant(...)),
        ...,
        FunctionDef(
            name="__getattr__",
            args=arguments(...),
            body=[Expr(...), ..., Return(...)],
            decorator_list=[],
            returns=None,
            type_comment=None,
            type_params=[]
        )
    ],
    type_ignores=[]
)

Happy to take feedback :)

@tomasr8 tomasr8 requested a review from isidentical as a code owner March 19, 2024 21:29
@bedevere-app bedevere-app bot mentioned this pull request Mar 19, 2024
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tomasr8
tomasr8 commented Mar 19, 2024
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aisk
aisk reviewed Mar 20, 2024
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