INFINITY = 1e+31

DIRECTIONS = ((-1,-1),(-1,0),(-1,1),
               (0,-1),        (0,1),
               (1,-1), (1,0), (1,1))

EMPTY = 0
BLACK = 1
WHITE = 2

def opposite_colour(col):
    if col == BLACK:
        return WHITE
    if col == WHITE:
        return BLACK

INFINITY = 1e+31

DIRECTIONS = ((-1,-1),(-1,0),(-1,1),
               (0,-1),        (0,1),
               (1,-1), (1,0), (1,1))

EMPTY = 0
BLACK = 1
WHITE = 2

def opposite_colour(col):
    if col == BLACK:
        return WHITE
    if col == WHITE:
        return BLACK

from pdb import set_trace as st

Make a shortcut for debugging with pdb
Make a shortcut for debugging with pdb
