Find a way to filter concept exercises by taskno from the command line (concept exercises)

Inizia leggendo l’uso dei marker di pytest e le funzioni conftest menzionate nell’issue, quindi riproduci il problema di selezione delle attività con un esercizio concettuale. Analizza come pytest espone gli argomenti dei marker dalla riga di comando. Il lavoro è completato quando gli utenti possono selezionare i test in base al taskno numerico senza affidarsi a pytest -k e senza selezionare test non correlati.

Hi,
Pytest test suites in Exercism contain custom marks in the form of @pytest.mark.task(taskno=X) where X is a whole number. At least in concept exercises, this number corresponds to the task inside the supplied README file.
While doing a concept exercise, I wanted to select pytest tests to run and filter them by this taskno parameter but failed to do so. What I tried:

1. @BethanyG sent me a link to StackOverflow thread which shows one similar problem:

However, the example code allows to run marks with arguments looking like this:
@pytest.mark.task("taskno1")

Perhaps there is a way to modify something in the conftest functions but I haven't wrapped my head around it.

2. I tried a plugin called pytest-pilot

It supplies easier syntax for solving similar problems as 1 but also didn't help me solve the problem. I would get an error IndexError: tuple index out of range.

What I use now:

1. pytest -k keyword_you_need
   It usually works, but sometimes I still select more of fewer tests than needed
2. pytest --tb=short
   I don't like long error messages from pytests so this is another way to limit pytest from adding too much unwanted output.

Filtering by task number would be "nice to have", but I think solving this problem is interesting in itself. All help is welcome :)