如何设置一个变量等于python中函数返回的值

Question

I'm trying to design a system that will allow me to move sprites to the cursor position when clicked, similar to RuneScape, where the player will move to the position of the mouse click on the screen. Here is my code below:

    for event in pygame.event.get ():
    if event.type == QUIT:
        pygame.quit ()
        sys.exit (0)

    elif event.type == KEYDOWN:
        if event.key == K_UP:
            Shrin_y -= 5
        elif event.key == K_LEFT:
            Shrin_x -= 5
        elif event.key == K_RIGHT:  
            Shrin_x += 5 
        elif event.key == K_DOWN:   
            Shrin_y += 5 
    elif event.type == MOUSEBUTTONDOWN:
        (Shrin_x, Shrin_y) = pygame.mouse.get_pos
        print pygame.mouse.get_pos

Surface.blit (Shrin, (Shrin_x, Shrin_y))

pygame.display.update ()

Note: Shrin is just the name of the sprite; if it pleases you, just replace all instances of Shrin in the code with 'sprite'.

So how do you store the value RETURNED by pygame.mouse.get_pos in (Shrin_x, Shrin_y) ?

Answer 1

(Shrin_x, Shrin_y) = pygame.mouse.get_pos

This line should be giving you an error, because it is trying to unpack a single value (a function or method object) to two variables. What you want is:

(Shrin_x, Shrin_y) = pygame.mouse.get_pos()

The difference is that the () is the operator which calls the callable object.

Answer 2

You need to call pygame.mouse.get_pos . The way you have it in your code you are just looking at the method. So change just change one line:

(Shrin_x, Shrin_y) = pygame.mouse.get_pos()