I'm trying to make a thing where in order to compact my code, I'm trying to combine the name of a string to a function if that makes any sense

Question

This example should help:

Let's say I have two arrays like, aX = ["x"] and bX = ["y"]

And I have a choice = input() like thing and if I type in a, I can get aX, and b to get bX.

I know in Javascript a findname thingy exists and it's like findName("a" + "x"), does anything like that exist in python?