tkinter and pygame

import tkinter, pygame, os

w,h = 500,200

root = tkinter.Tk()
embed = tkinter.Frame(root,width=w,height=h)
embed.pack()

os.environ['SDL_WINDOWID'] = str(embed.winfo_id()) # this makes it work
screen = pygame.display.set_mode((w,h))
fpsclock = pygame.time.Clock()

x = 0
radius = 30
mod = w+radius*2

while True:
    try: root.update()
    except: break

    ticks = fpsclock.tick()
    if ticks>100: continue
    dt = ticks/1000

    screen.fill((0,0,0))
    pygame.draw.circle(screen,(255,255,255),(int(x)-radius,100),radius)
    pygame.display.flip()

    x = (x+dt*100)%mod