How to make a variable updates itself constantly in pygame? (Making a ball not able to reach a certain height)

Question

So basically I have this code
#---------------Configuration statements------------------------------
import pygame
import time
pygame.init()
display_width = 600
display_height = 600
gameDisplay=pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption('Jump')
clock = pygame.time.Clock()
#-------------colors---------------
black = ((0,0,0))
white=((255,255,255))
#------------Moving objects : circle----------------------------------
x_circle = 50
y_circle = 500
y_circle_change= 0
orientationState = int(0)
#0 for idle, 1 for upwards, 2 for downwards
radius_circle = 20
def cercle(color,x_circle,y_circle,radius_circle):
pygame.draw.circle(gameDisplay,color,[x_circle,y_circle],radius_circle)
#_________Static objects : square-----------------------------------
crashed = False
while not crashed:
for event in pygame.event.get():
if event.type == pygame.QUIT:
crashed = True
if event.type == pygame.KEYDOWN:
if event.key==pygame.K_SPACE:
y_circle_change = 10
orientationState = int(1)
if event.type==pygame.KEYUP:
if y_circle<=500 :
y_circle_change = 10
orientationState=int(2)
if y_circle>=500:
orientationState = int(0)
if y_circle>=500:
y_circle_change = 0
y_circle = 500
orientationState = int(0)
if orientationState is int(1):
y_circle -= y_circle_change
if orientationState is int(2):
y_circle+=y_circle_change
elif orientationState is int(0):
y_circle+=0
pygame.display.update()
clock.tick(60)
gameDisplay.fill(white)
cercle(black,x_circle,y_circle,50)
What I am trying to do here is to prevent the circle, which is actually a ball, to be lower than a certain height, what it does instead is it let the ball fall but when I do press

Answer 1

You are using somekind of engine for your program if I'm not mistaking?
Well, sorry for not answering your question, I don't even know the engine you're using. But to avoid having troubles like these, consider writing your own code/engine, because it is way easier for debugging, for a very simple reason - you know what your code contains and you will fix bugs way easier. With every engine/library like this, you need to take a course or something in order to master it, and that doesn't give you much experience in programming...
I have a similar ball physics code written in java, which works pretty well as far as I remember... Let me know if you need help....

Answer 2

I am not using any engine just the standard python software and the pygame library