How to create a folder and create files in it?

Question

Python

Hey!
How to make such a function that a folder would be created (if it does not exist, and if there is, then skip this step),
and another one would be created in it, and a file would be created in it?
type
def create file:
create folder("folder_1")
create("/folder_1/file.py")

and then through
file.write() it was possible to edit these files?