Adafruit Pi Framebuffer https://learn.adafruit.com/pi-video-output-using-pygame/pointing-pygame-to-the-framebuffer

framebuffer.py

import os
import pygame
import time
import random

class pyscope :
    screen = None;
    
    def __init__(self):
        "Ininitializes a new pygame screen using the framebuffer"
        # Based on "Python GUI in Linux frame buffer"
        # http://www.karoltomala.com/blog/?p=679
        disp_no = os.getenv("DISPLAY")
        if disp_no:
            print "I'm running under X display = {0}".format(disp_no)
        
        # Check which frame buffer drivers are available
        # Start with fbcon since directfb hangs with composite output
        drivers = ['fbcon', 'directfb', 'svgalib']
        found = False
        for driver in drivers:
            # Make sure that SDL_VIDEODRIVER is set
            if not os.getenv('SDL_VIDEODRIVER'):
                os.putenv('SDL_VIDEODRIVER', driver)
            try:
                pygame.display.init()
            except pygame.error:
                print 'Driver: {0} failed.'.format(driver)
                continue
            found = True
            break
    
        if not found:
            raise Exception('No suitable video driver found!')
        
        size = (pygame.display.Info().current_w, pygame.display.Info().current_h)
        print "Framebuffer size: %d x %d" % (size[0], size[1])
        self.screen = pygame.display.set_mode(size, pygame.FULLSCREEN)
        # Clear the screen to start
        self.screen.fill((0, 0, 0))        
        # Initialise font support
        pygame.font.init()
        # Hide the mouse cursor
        pygame.mouse.set_visible(0)

        # Render the screen
        pygame.display.update()

    def __del__(self):
        "Destructor to make sure pygame shuts down, etc."

    def background(self):
        # Fill the screen with red (255, 0, 0)
        red = (255, 0, 0)
        self.screen.fill(red)
        # Update the display
        pygame.display.update()

    def draw_rect(self):
        pygame.draw.rect(self.screen, (0,0,255), (200,150,100,50))
        pygame.display.update()

# Create an instance of the PyScope class
scope = pyscope()
scope.background()
time.sleep(1)
scope.draw_rect()
time.sleep(3)