Choose file from a list

A handy demo pattern for you to follow should you want a user interface with a list of files along the left hand edge and something done with those files on the right side of the window.

This is a highly "responsive" PySimpleGUI layout in that it will immediately take action when the user interacts with the window. You do not need to click a button to indicate a choice was made. You can also paste the folder path into the input box and the listbox will immediately populare with the correct folder's contents.