Text editor settings

I'm pretty much new to this forum and I'm trying to lea Python programming, however I have some strong issues that need fixing, before I can begin with the programming, main one being that any text editor that I download from the world wide web won't run Python 3 code due to some settings that aren't correctly done or applied yet. So I'm asking you, if you are an expert and you've faced something similar, to offer me a solution on how to run a Python 3 code on text editors, such as Atom, Sublime Text, and Brackets? Any help would be greatly appreciated. :)