Addition to callbacks & custom UIs - Python

https://polyscope.run/py/features/callbacks_and_UIs/#creating-custom-uis

#If we want to use local variables & assign to them in the UI code below, 
# we need to mark them as nonlocal. This is because of how Python scoping 
# rules work, not anything particular about Polyscope or ImGui.
# Of course, you can also use any other kind of python variable as a controllable 
# value in the UI, such as a value from a dictionary, or a class member. Just be 
# sure to assign the result of the ImGui call to the value, as in the examples below.
# 
# If these variables are defined at the top level of a Python script file (i.e., not
# inside any method), you will need to use the `global` keyword instead of nonlocal`.

If you want to avoid using declarations global or nonlocal,
you can also use different module to store these values and call it on main module as below

variables.py
is_true: bool = False

main.py

import variables as vr

def callback()
        change, vr.is_true = psim.Checkbox("Selection box", vr.is_true)

Commencez par consulter la page de documentation liée sur les callbacks et les UIs personnalisées, puis examinez les exemples environnants. Ajoutez l’approche présentée, basée sur un module Python, pour stocker les valeurs contrôlées par l’UI aux indications existantes sur global et nonlocal, en utilisant variables.py et main.py comme exemple. Le travail est terminé lorsque la page explique clairement cette alternative et que l’exemple est cohérent avec l’API de callbacks.