Accessing a variable on another form without using get_open_form or self.parent

Anvil Q&A
4

You could do something like:

# in Form1
Globals.form_1_label = self.summary_label

# in Form2
Globals.form_1_label.text = 'something'

This works, but it can get messy in the long run.

A cleaner way to do it would be by setting up some custom events on the container form and firing the events from the contained forms. The documentation describes how to do it here, and this tutorial uses the technique in the delete button.