>>> from __future__ import annotations
>>> a: Type[int, str]
>>> b: Type[(int, str, *types)]
>>> __annotations__
{'a': 'Type[int, str]', 'b': 'Type[int, str, *types]'}
>>> ast.parse(__annotations__["b"])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/isidentical/cpython/master/Lib/ast.py", line 50, in parse
    return compile(source, filename, mode, flags,
  File "<unknown>", line 1
    Type[int, str, *types]
                   ^
SyntaxError: invalid syntax

$ python3.8
Python 3.8.0+ (heads/3.8:b9e5547f58, Nov 28 2019, 19:18:03) 
[GCC 9.2.1 20191008] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from __future__ import annotations
>>> b: Type[(int, str, *types)]
>>> __annotations__
{'b': 'Type[int, str, *types]'}

 $ python3.7
Python 3.7.5 (default, Apr 19 2020, 20:18:17) 
[GCC 9.2.1 20191008] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from __future__ import annotations
>>> b: Type[(int, str, *types)]
>>> __annotations__
{'b': 'Type[int, str, *types]'}
>>>