44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
class TTTGame:
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"Models a tic-tac-toe game."
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def __init__(self, playerX, playerO):
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self.board = [None] * 9
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self.turn_index = 0
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self.players = {
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'X': playerX,
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'O': playerO,
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}
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def play_move(self, move):
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if not self.is_valid_move(move):
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raise ValueError(f"Illegal move {move} with board {self.board}.")
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self.board[move] = self.get_current_player_symbol()
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self.turn_index += 1
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def get_valid_moves(self):
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"Returns a list of the indices of empty spaces"
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return [index for index in range(9) if self.board[index] is None]
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def is_valid_move(self, move):
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"Checks whether a move is valid."
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return move in self.get_valid_moves()
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def get_current_player_symbol(self):
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"Returns the symbol of the current player"
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if self.turn_index % 2 == 0:
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return 'X'
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else:
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return 'O'
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def get_current_player(self):
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"Returns the symbol of the current player and the current player"
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return self.players[self.get_current_player_symbol()]
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def is_over(self):
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"Checks whether the game is over."
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return self.check_winner('X') or self.check_winner('O')
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def check_winner(self, symbol):
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"Checks whether the player with `symbol` has won the game."
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return False
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