Use argparse to run 1 of 2 functions in my script

Question

I currently have 2 functions in my .py script.

#1 connects to the database and does some processing.

#2 does some other processing on files

Currently before I run the script, I have to manually comment/uncomment the function I want to run in my main if statement block.

How can I use argparse, so it asks me which function to run when I run my script?