We show here how to set up a pool of Togglables (on/off) elements, in such a way that
only once at a time is in the state 'on'. This can be seen as a system of tabs.

import pygame
import thorpy as tp

W,H = 1200, 700
screen = pygame.display.set_mode((W, H))
tp.init(screen, tp.theme_human) #bind screen to gui elements and set theme

# my_pool = tp.TogglablesPool("Difficulty",
#                                ("Beginner", "Intermediate", "Pro"), #possibilities
#                                "Beginner") #initial value
my_pool = tp.TogglablesPool("Difficulty",
                               ("Beginner", "Intermediate", "Pro"), #possibilities
                               "Beginner", #initial value
                               togglable_type="toggle") #either 'toggle', 'radio' or 'checkbox'
choice = tp.Text(my_pool.get_value())
box = tp.TitleBox("Togglables pool example", [my_pool, choice])

def refresh():#some function that you call once per frame
    if my_pool.get_value():
        choice.set_text("Your choice: " + my_pool.get_value())
#For the sake of brevity, the main loop is replaced here by a shorter but blackbox-like method
player = box.get_updater().launch(refresh)