gh-140344: ast: Add deprecation warnings #140345
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jepler
requested review from
Eclips4,
JelleZijlstra,
isidentical and
tomasr8
as code owners
These were all deprecated in 3.9 (bace59d) but without a runtime deprecation warning. Add it now, so that these items can be removed in 3.20 per PEP 387.
jepler
changed the title
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I've updated this PR so that it makes deprecation warnings. Currently the deprecation says 3.20 is the time for removal (standard PEP 387) but I can change it to 3.17 if there's consensus that it's OK to do so. |
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| The classes ``ast.Suite``, ``ast.AugLoad``, ``ast.AugStore``, and | |||
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This only lists four of the seven things deprecated. It also doesn't mention the .dims attribute.
| indent=args.indent, show_empty=args.show_empty)) | ||
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| _deprecated = { | ||
| 'slice': globals().pop("slice"), |
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Note this means from ast import * will no longer pick these up. That's probably OK for 3.15 but let's mention it in docs.
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| The classes ``ast.Suite``, ``ast.AugLoad``, ``ast.AugStore``, and | |||
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Any migration guidance if anyone still uses these?
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You can find discussion around the original deprecations, e.g., #84169 but I didn't find any specific migration advice.
An ast produced by ast.parse will never include instances of these classes.
The implementation of all the removed classes are pretty trivial so if you need them for some reason you can probably just copy them. e.g., AugLoad has no body beyond a docstring.
class AugLoad(expr_context):
"""Deprecated AST node class. Unused in Python 3."""
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Yeah there's no good use for them. Most likely if people are using them, it's just some code that does something for all AST nodes, and they should simply delete the code handling these nodes. But that's guesswork.
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Please list these in "What's new in Python 3.15" > "New deprecations" and "Pending removal in Python 3.20": |
done! |
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| (Contributed by Hugo van Kemenade and Stan Ulbrych in :gh:`76007`.) | ||
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| * The ``__version__`` attribute has been deprecated in these standard library |
| """ | ||
| from _ast import * | ||
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Please revert unrelated changes.
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