Poetry is a tool that does everything for you. It will allow you to define matter data for your package, build the package for you so you can publish it on pipe. It can manage environments for you, install all the dependencies of your project and your project itself. So it has a resolution mechanism. And it has a lock file, which is, for me, a really important feature. Not only is it good for deploy services in in a reproducible and deterministic way,. But it's also for running the checks on your coat and making sure that the cheqks run exactly the same locally on your machine or others' machines.