ast

AST nodes now have ``end_lineno`` and ``end_col_offset`` attributes,

which give the precise location of the end of the node. (This only

applies to nodes that have ``lineno`` and ``col_offset`` attributes.)

The :func:`ast.parse` function has some new flags:

* ``type_comments=True`` causes it to return the text of :pep:`484` and

:pep:`526` type comments associated with certain AST nodes;

* ``mode='func_type'`` can be used to parse :pep:`484` "signature type

comments" (returned for function definition AST nodes);

* ``feature_version=N`` allows specifying the minor version of an

earlier Python 3 version. (For example, ``feature_version=4`` will

treat ``async`` and ``await`` as non-reserved words.)

New function :func:`ast.get_source_segment` returns the source code

for a specific AST node.

typing

The :mod:`typing` module incorporates several new features:

* Protocol definitions. See :pep:`544`, :class:`typing.Protocol` and

:func:`typing.runtime_checkable`. Simple ABCs like

:class:`typing.SupportsInt` are now ``Protocol`` subclasses.

* A dictionary type with per-key types. See :pep:`589` and

:class:`typing.TypedDict`.

* Literal types. See :pep:`586` and :class:`typing.Literal`.

* "Final" variables, functions, methods and classes. See :pep:`591`,

:class:`typing.Final` and :func:`typing.final`.

* New protocol class :class:`typing.SupportsIndex`.

* New functions :func:`typing.get_origin` and :func:`typing.get_args`.