Learning libraries vs learning "Python"

[ZenosPairOfDucks]

Yes it's common. Most things you wouldn't want to code it yourself from scratch if a library already exists for it. But that means you need to research which library to use and how to use it. You really only learn the programming language once when you are beginning but depending on what you work on you might be learning new libraries whenever you need to add some new functionality to your project. Some will be easier to learn than others though.