title: Python, how can i solve this jumping problem?
body: <p>Hello i have a problem with jumping. I've defined 3 functions: main loop with game process, draw<em>window which displays the window and square</em>_movement function which is responsible for handling the movement of a rect square. I want the square to jump but whenever i click space, nothing happens and i can't find a solution to fix it. Could someone help me?</p>
  <pre><code>import pygame
  import os
  import random
  pygame.init()
  
  #----------------------------------------------------------
  #VARIABLES
  
   #SCREEN
  WIDTH, HEIGHT = 900, 500
  WIN = pygame.display.set_mode((WIDTH, HEIGHT))
  FPS = 60
  
   #COLORS
  BLACK = (0, 0,0)
  RED = (255, 0, 0)
  
  #OBJECT
  square_y = 340
  vel_y = 10
  square = pygame.Rect((10, square_y), (150, 150))
  
   #JUMPING
  jump = False
  #----------------------------------------------------------
  
  #DISPLAY
  def draw_window(square):
      #SCREEN
      WIN.fill(BLACK)
      #OBJECTS
      pygame.draw.rect(WIN, RED, square)
  
      pygame.display.update()
  
  #MOVEMENT
  def square_movement(keys_pressed, jump, square, square_y, vel_y):
      if jump is False and keys_pressed[pygame.K_SPACE]:
          jump = True
  
      if jump is True:
          square_y -= vel_y
          square_y -= 1
          if vel_y &lt; -10:
              jump = False
              vel_y = 10
  
  #MAIN LOOP
  def main():
      #VARIABLES
  
      clock = pygame.time.Clock()
      run = True
      while run:
          clock.tick(FPS)
          for event in pygame.event.get():
              if event.type == pygame.QUIT:
                  run = False
  
          keys_pressed = pygame.key.get_pressed()
  
          #MOVEMENT
          square_movement(keys_pressed, jump, square, square_y, vel_y)
  
          draw_window(square)
  
      pygame.quit()
  
  if __name__ == &quot;__main__&quot;:
      main()
  </code></pre>