[Tutor] Importing classes when needed

[Timo]

Hello all,

I have a question about how this is done the best way.

In my project I have a folder with multiple file parsers, like this:
- src
  -- main.py
  -- parsers
   --- __init__.py
   --- parser1.py
   --- parser2.py

The parsers just contain a class which do the work.

When the user clicks a button, I want to show all available parsers and 
use the choosen one when the user clicks "ok".
Is it ok to place the following code in the __init__.py?
from parser1 import Parser1
from parser2 import Parser2
def get_parsers():
     return [Parser1(), Parser2()]

If so, is it ok to do a get_parsers() everytime the user clicks a 
button? Because that will initialize the parsers over and over again, right?

Cheers,
Timo