https://github.com/python/cpython/commit/85a2eef473a2c9ed3ab9c6ee339891fe99a... commit: 85a2eef473a2c9ed3ab9c6ee339891fe99adbbc9 branch: master author: Serhiy Storchaka <storchaka@gmail.com> committer: GitHub <noreply@github.com> date: 2020-02-17T11:03:00+02:00 summary: bpo-32892: Update the documentation for handling constants in AST. (GH-18514) files: M Doc/library/ast.rst M Doc/whatsnew/3.8.rst diff --git a/Doc/library/ast.rst b/Doc/library/ast.rst index 2cee8738e5834..bfd571deb4fd1 100644 --- a/Doc/library/ast.rst +++ b/Doc/library/ast.rst @@ -101,12 +101,16 @@ Node classes node = ast.UnaryOp(ast.USub(), ast.Constant(5, lineno=0, col_offset=0), lineno=0, col_offset=0) +.. versionchanged:: 3.8 + + Class :class:`ast.Constant` is now used for all constants. + .. deprecated:: 3.8 - Class :class:`ast.Constant` is now used for all constants. Old classes - :class:`ast.Num`, :class:`ast.Str`, :class:`ast.Bytes`, + Old classes :class:`ast.Num`, :class:`ast.Str`, :class:`ast.Bytes`, :class:`ast.NameConstant` and :class:`ast.Ellipsis` are still available, - but they will be removed in future Python releases. + but they will be removed in future Python releases. In the meanwhile, + instantiating them will return an instance of a different class. .. _abstract-grammar: diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst index cb4c518662d6b..09047c460df01 100644 --- a/Doc/whatsnew/3.8.rst +++ b/Doc/whatsnew/3.8.rst @@ -1940,6 +1940,12 @@ Changes in the Python API :exc:`dbm.gnu.error` or :exc:`dbm.ndbm.error`) instead of :exc:`KeyError`. (Contributed by Xiang Zhang in :issue:`33106`.) +* Simplified AST for literals. All constants will be represented as + :class:`ast.Constant` instances. Instantiating old classes ``Num``, + ``Str``, ``Bytes``, ``NameConstant`` and ``Ellipsis`` will return + an instance of ``Constant``. + (Contributed by Serhiy Storchaka in :issue:`32892`.) + * :func:`~os.path.expanduser` on Windows now prefers the :envvar:`USERPROFILE` environment variable and does not use :envvar:`HOME`, which is not normally set for regular user accounts.