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Add deprecation warnings for deprecated items in ast.py #140344
Description
Feature or enhancement
Proposal:
Actually remove the following classes, which were marked as deprecated in Python 3.9:
class Suite(mod):
"""Deprecated AST node class. Unused in Python 3."""
class AugLoad(expr_context):
"""Deprecated AST node class. Unused in Python 3."""
class AugStore(expr_context):
"""Deprecated AST node class. Unused in Python 3."""These were previously removed but then restored in GH-19056 (Python 3.9)
If it's not feasible to remove them in 3.15 (for instance, as there was never been a runtime deprecation warning added) then add the runtime deprecation instead.
Has this already been discussed elsewhere?
This is a minor feature, which does not need previous discussion elsewhere
Links to previous discussion of this feature:
No response
Activity
ast: Remove classes deprecated in 3.9 (python#140344)
pythongh-140344: ast: Remove classes deprecated in 3.9
[-]Actually reomve deprecated classes from ast.py[/-][+]Actually remove deprecated classes from ast.py[/+]pythongh-140344: ast: Remove classes deprecated in 3.9
hugovk commentedon Oct 20, 2025
We should follow PEP 387 and add deprecation warnings for a few releases first.
#19056 (comment) says why we didn't do that before, but let's do that now.
jepler commentedon Oct 20, 2025
Thanks for the feedback.
I'll close the first PR I made and open a fresh one that adds deprecation notices. Is
warnings.deprecateddecorator an appropriate way to do that? I'll have a gander at how this is being done elsewhere.hugovk commentedon Oct 20, 2025
I usually use
warnings._deprecated: https://discuss.python.org/t/introducing-warnings-deprecated/14856For example:
cpython/Lib/imaplib.py
Lines 1969 to 1971 in e4f6445
hugovk commentedon Oct 20, 2025
If you want, we can re-use this issue and just change the title/description?
pythongh-140344: ast: Add deprecation warnings
jepler commentedon Oct 20, 2025
Oops, my mistake -- I closed the issue instead of the PR. If you re-open this, that would be excellent.
[-]Actually remove deprecated classes from ast.py[/-][+]Add deprecation warnings for deprecated items in ast.py[/+]Merge remote-tracking branch 'upstream/main' into pr-140345-jepler-py…
Merge remote-tracking branch 'origin/main' into pythongh-140344
pythongh-140344: Re-target deprecation to occur in 3.21
gh-140344: ast: Add deprecation warnings (#140345)
hugovk commentedon May 18, 2026
Thank you for the PR! 🎉