I have my own pip package, which is called my_package.
It's quite large, and I want to split it into a few packages, which I can optionally install if necessary.
So my goal is: to have main package called my_package, and some extra packages (for example, my_package[extra1]), which can extend functionality of the main package.
I've done some research, and found out that you can specify [project.optional-dependencies] in pyproject.toml file, and it will install neccessary optional dependencies to your project.
And it seems like a good idea: to make an optional functionality as a separate pip package.
But the question is: how to gracefully implement it into the main package?
I mean, I want to install this "extra" package by pip install my_package[extra1], and it should lead to automatically added functionality to my project.
Under the hood it just installes a different package, but how to use it by the main package?
Should I check the dependency existance in environment by some way?
