def checkio(rows):
cols = [''.join([rows[y][x] for y in range(3)]) for x in range(3)]
digs = [''.join([rows[x][x] for x in range(3)]),
''.join([rows[x][2 - x] for x in range(3)])]
triples = rows + cols + digs
for check in triples:
winner = x_or_o(check)
if winner: return winner
return 'D'
def x_or_o(triple):
if triple.count('X') == 3:
return 'X'
elif triple.count('O') == 3:
return 'O'
else:
return
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert checkio([
"X.O",
"XX.",
"XOO"]) == "X", "Xs wins"
assert checkio([
"OO.",
"XOX",
"XOX"]) == "O", "Os wins"
assert checkio([
"OOX",
"XXO",
"OXX"]) == "D", "Draw"
assert checkio([
"O.X",
"XX.",
"XOO"]) == "X", "Xs wins again"
http://www.checkio.org/mission/x-o-referee/