What does "Cannot have more than on screen object" error mean?

Question

I'm working on a timer template for use in my games that I create. This is the code I have for a timer module (haven't put it into a class yet)

import time
import math
import pygame
from livewires import games, color
timer = 0

games.init(screen_width = 640, screen_height = 480, fps = 50)

gamefont = pygame.font.Font(None, 30)
timertext = gamefont.render('Timer: ' +str(timer), 1, [255,0,0])
screen.blit(timertext, [scoreXpos,20])

Eventually, I'm going to have a live timer which is why I use the the render and blit methods, but for now, I just have a static variable called timer set equal to 0. When I run this program however, I get an error that says "Cannot have more than on screen object." I'm really confused because I don't think I've ever seen this error before, and definitely don't know what it means, or how to fix it. If someone could help me understand what's happening, I would very much appreciate it. Also, the reason I've imported games and color from livewires, is to use it for another purpose later on in the code.

please post the entire error message, that is, the entire TraceBack — Ryan Haining, Jul 08 '13 at 17:28

score 0 · Answer 1 · answered Jul 09 '13 at 08:31

The exception is raised by the Screen class of livewires.

...
class Screen(object): 

    initialized = 0 

    def __init__ (self, width=640, height=480, fps=50): 
        # Bomb if you try this more than once
        if Screen.initialized: 
            raise GamesError("Cannot have more than on Screen object")

        Screen.initialized = 1
...

You didn't show your entire code, so I guess you created a second instance of the Screen class somewhere.

What does "Cannot have more than on screen object" error mean?

1 Answers1