raster: Fixed PEP8 - E721 for category.py

[arohanajit]

Used isinstance() instead of == for type instance checks

[echoix]

You might want to look if these issues are also ignored by ruff with the following rule : https://docs.astral.sh/ruff/rules/type-comparison/

Using ruff might help you find these faster too, and then use flake8 for the exhaustive checking of the unhandled cases from ruff.

[echoix]

I see in the pyproject.tomm that E721 is completely ignored for now.

grass/pyproject.toml

Lines 127 to 134 in 63fc743

	"DTZ011", # call-date-today
	"E402", # module-import-not-at-top-of-file
	"E501", # line-too-long
	"E721", # type-comparison
	"E722", # bare-except
	"E731", # lambda-assignment
	"E741", # ambiguous-variable-name
	"F403", # undefined-local-with-import-star

[echoix]

See here: echoix#305, there's only 23 instances of E721 detected by ruff, and you're already fixing 2 of them. Are some of them easily fixable too?

For this particular rule, they are usually quite easy to review, once the choice on whether using an isinstance check is appropriate vs an is / is not check.

[echoix]

@arohanajit Is there something else to do here, after verifications? Otherwise we could go forward with this one

[arohanajit]

@arohanajit Is there something else to do here, after verifications? Otherwise we could go forward with this one

No, for the flake8 errors in this particular case there is nothing more to be done