Type hints break on Python 3.8

[Aleksa Sarai]

openSUSE Tumbleweed only has Python 3.8, which causes issues due to the usage of list[str]-style type hints which were first added in Python 3.9:

Traceback (most recent call last):
  File "/usr/lib64/python3.8/runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib64/python3.8/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/home/cyphar/src/AnkiNoteTypes/antp/__main__.py", line 4, in <module>
    from antp.exporter import export_note_type
  File "/home/cyphar/src/AnkiNoteTypes/antp/exporter.py", line 10, in <module>
    import antp.common as ac
  File "/home/cyphar/src/AnkiNoteTypes/antp/common.py", line 23, in <module>
    def select(items: list[str]) -> Optional[str]:
TypeError: 'type' object is not subscriptable

I can send a patch to switch back to the old style typing.List[str] if you like.

[Aleksa Sarai]

(Actually Tumbleweed does have Python 3.9, it's just not the default and you have to install it separately.)

[Ren Tatsumoto]

I'm aware of it. Thankfully, almost all platforms already have python 3.9, it was released quite a few months ago after all.