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gh-140196: Added constructor behavior changes in ast.rst for python 3.13 #140243

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gh-140196: Added constructor behavior changes in ast.rst for python 3.13 #140243

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gh-140196: Document missing AST node constructor behavior changes in …
MannXo Oct 17, 2025
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Removed the redundant whitespace
MannXo Oct 17, 2025
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8 changes: 8 additions & 0 deletions Doc/library/ast.rst
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Expand Up @@ -134,6 +134,14 @@
Simple indices are represented by their value, extended slices are
represented as tuples.

.. versionchanged:: 3.13

AST node constructors were changed to provide sensible defaults for omitted

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py:class reference target not found: ast.expr_context [ref.class]
fields: optional fields now default to ``None``, list fields default to an
empty list, and fields of type :class:`ast.expr_context` default to
:class:`Load() <ast.Load>`. Previously, omitted attributes would not exist on constructed
nodes (accessing them raised :exc:`AttributeError`).

.. versionchanged:: 3.14

The :meth:`~object.__repr__` output of :class:`~ast.AST` nodes includes
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