Disregard, I found a different source.

@mikael, thank you, that took care of it. I had tried that, but I put it at the update function not the select function.

@Appletrain youpee

And that is the example of the ui module doc for ui.in_background

ui.in_background(fn) Call a function on the main interpreter thread. This is useful to perform long-running tasks from an action or delegate callback without blocking the UI. It can also be used for functions that don’t support being called from the main UI thread (e.g. console.alert()).