how to identify when the mouse button is lifted pygame code example

Example 1: pygame detect click

while ... # your main loop
  # get all events
  ev = pygame.event.get()

  # proceed events
  for event in ev:

    # handle MOUSEBUTTONUP
    if event.type == pygame.MOUSEBUTTONUP:
      pos = pygame.mouse.get_pos()

      # get a list of all sprites that are under the mouse cursor
      clicked_sprites = [s for s in sprites if s.rect.collidepoint(pos)]
      # do something with the clicked sprites...

Example 2: pygame get mouse position

x,y = pygame.mouse.get_pos()
#get the mouse cursor position
#get_pos() -> (x, y)
#Returns the X and Y position of the mouse cursor.
#The position is relative to the top-left corner of the display.
#The cursor position can be located outside of the display window,
#but is always constrained to the screen.