[newbie] help with pygame-tutorial

[aapeetnootjes]

I'm trying out the pygame tutorial at http://www.pygame.org/docs/tut/intro/intro.html
If I try out the code I'm facing an error:
./game.py: line 4: syntax error  at unexpected symbol 'size'
./game.py: line 4: `size = width, height = 320, 240'

can anyone here tell me what's going wrong?

thanks