Why not just use `mypy`and "pytest`? What are the advantages of the "pytest-mypy" package?

Sorry for my noob question, but what is the purpose of the package? I can run in a terminal locally or at a cloud’s CI/CD the following two commands:

>  mypy src/ && mypy tests/
>  pytest tests/ 

So why waste time on a new package development instead of just running two simple commands?

[LourensVeen]

I use this plugin, and a few more for my favourite linters, to run all the checks in a single command as @dmtucker described.

This has several advantages:

• I don’t accidentally forget to run one of them and miss an issue that I later have to go back and fix
• External contributors unfamiliar with my setup can run a single command to check their changes, rather than having to learn about how exactly this project tests and lints and typechecks its code and do it manually
• I call the same command on my Continuous Integration infrastructure, giving me a single place to add or remove tools that applies everywhere

I do actually use this for projects that support a range of Python versions; I just run pytest with all the plugins in an appropriate container on the CI. The checks are fast anyway, so it’s no big deal. It’s true that I should get rid of that setup and move to tox though, I just haven’t got a sufficiently round tuit yet 😃.

So thanks to @dmtucker and @dbader and the other contributors for this useful tool!

Maybe we could consider this issue a request for adding a few lines on “What is this for?” to the README?

[blubberdiblub]

FWIW, PyCharm doesn’t provide a mypy Run Configuration, but it does provide a pytest one.

Furthermore, it doesn’t have a Run Configuration to run some arbitrary executable or script in an arbitrary way without limitations or strange peculiarities. It does have a Shell Script Run Configuration that can indeed be abused to do that, however, that’s not the intent of that.

Therefore, this module can be a simple way to integrate an explicit mypy run (as opposed to another real-time background inspection) with PyCharm.