added isinstance and issubclass (tuple to type union) support

[leshark]

Small plugin for changing

isinstance(value, (type1, type2, type3, ...))
issubclass(value, (type1, type2, type3, ...))

to

isinstance(value, type1 | type2 | type3 | ...)
issubclass(value, type1 | type2 | type3 | ...)

as was enabled in pep-0604

Additionally added:

• some stuff in .gitignore
• tokenize-rt library to requirements-dev.txt (for some reason it was not present there. Maybe we should pin version?)

P.S: isinstance and issubclass have a weird signature:

__obj: object, __class_or_tuple: type | types.UnionType | tuple[type | types.UnionType | tuple[Any, ...], ...]

which means it is possible to pass a tuple of types inside tuple of types and it will work. I have never seen anyone using this, so I leave it as it is.

[asottile]

idk that this is really an improvement -- I expect it to be slower too

[asottile]

don't touch gitignore in projects you don't own

[leshark]

do you propose storing venv not in the project folder then?

[asottile]

if you use virtualenv it is automatically gitignored

[asottile]

or you can set a global ignore if you insist on using venv

personally I use tox --devenv venv

[leshark]

I will return it back, but can you explain why are you against of adding /venv to .gitignore?

[asottile]

read the history

[asottile]

this indicates you're not running the project correctly. the dependencies for runtime are installed through setup.cfg, perhaps you're on a 5 year old version of tox or virtualenv?

[leshark]

removed

[leshark]

idk that this is really an improvement -- I expect it to be slower too

Do you want a benchmark? I doubt there is a big difference. Looks nicer though

[AlexWaygood]

idk that this is really an improvement -- I expect it to be slower too

isinstance() checks on Union types have been sped up significantly in 3.11, but they are indeed quite a bit slower than isinstance() checks on tuples on 3.10 (~4x slower). See python/cpython#91603 for more details.