92 lines
2.2 KiB
Python
92 lines
2.2 KiB
Python
'''
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Tic-tac-toe game player.
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Input the index of where you wish to place your mark at your turn.
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'''
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import random
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board = list('123456789')
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wins = ((0,1,2), (3,4,5), (6,7,8),
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(0,3,6), (1,4,7), (2,5,8),
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(0,4,8), (2,4,6))
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def printboard():
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print('\n-+-+-\n'.join('|'.join(board[x:x+3]) for x in(0,3,6)))
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def score(board=board):
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for w in wins:
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b = board[w[0]]
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if b in 'XO' and all (board[i] == b for i in w):
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return b, [i+1 for i in w]
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return None
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def finished():
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return all (b in 'XO' for b in board)
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def space(board=board):
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return [ b for b in board if b not in 'XO']
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def my_turn(xo, board):
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options = space()
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choice = random.choice(options)
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board[int(choice)-1] = xo
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return choice
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def my_better_turn(xo, board):
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'Will return a next winning move or block your winning move if possible'
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ox = 'O' if xo =='X' else 'X'
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oneblock = None
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options = [int(s)-1 for s in space(board)]
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for choice in options:
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brd = board[:]
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brd[choice] = xo
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if score(brd):
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break
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if oneblock is None:
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brd[choice] = ox
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if score(brd):
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oneblock = choice
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else:
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choice = oneblock if oneblock is not None else random.choice(options)
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board[choice] = xo
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return choice+1
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def your_turn(xo, board):
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options = space()
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while True:
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choice = input("\nPut your %s in any of these positions: %s "
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% (xo, ''.join(options))).strip()
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if choice in options:
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break
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print( "Whoops I don't understand the input" )
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board[int(choice)-1] = xo
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return choice
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def me(xo='X'):
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printboard()
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print('\nI go at', my_better_turn(xo, board))
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return score()
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def you(xo='O'):
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printboard()
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# Call my_turn(xo, board) below for it to play itself
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print('\nYou went at', your_turn(xo, board))
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return score()
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print(__doc__)
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while not finished():
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s = me('X')
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if s:
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printboard()
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print("\n%s wins along %s" % s)
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break
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if not finished():
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s = you('O')
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if s:
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printboard()
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print("\n%s wins along %s" % s)
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break
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else:
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print('\nA draw')
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