tictactoe.py

# Before your interview, write a program that lets two humans play a game
# of Tic Tac Toe in a terminal. The program should let the players take
# turns to input their moves. The program should report the outcome of
# the game.
#
# During your interview, you will pair on adding support for a computer
# player to your game. You can start with random moves and make the AI
# smarter if you have time.


def printBoard(board):
	print("", board[1], "|" , board[2], "|" , board[3])
	print("---|---|---")
	print("", board[4], "|" , board[5], "|" , board[6])
	print("---|---|---")
	print("", board[7], "|" , board[8], "|" , board[9])
	print()
	return

def getMove(board,playersymbol):
	print("Player", playersymbol, "your turn!")
	while True:
		move = input("Enter the number of the square you want: ")
		try:
			index = int(move.strip())
			if isValidMove(board, index):
				board[int(move.strip())] = playersymbol
				print("")
				break
			else:
				print ("Sorry, that's not a valid move.")
		except ValueError:
			print("Sorry, I didn't understand that.")
	return


def isValidMove(board, move):
	if 1 <= move <= 9:
		return(board[move] == str(move))
	else:
		return False

def swapPlayer(p):
	if p == "x":
		p = "o"
	else:
		p = "x"
	return(p)	

	
def checkWon(board,winningstates):
	for state in winningstates:
		if board[state[0]]==board[state[1]]==board[state[2]]:
			return (True)
			break
	return(False)
		

############SET UP############
board = ['notused', '1', '2','3','4', '5', '6','7','8','9'] #avoid 0, looks like the letter 'o'
playersymbol = "o"
winningstates = [[1,2,3],[4,5,6],[7,8,9],[1,4,7],[2,5,8],[3,6,9],[1,5,9],[3,5,7]]
won = False
turns = 0
printBoard(board)
	
	
############CONGATS TO WINNER############

while ((won == False) & (turns < 9)):
	playersymbol = swapPlayer(playersymbol)
	getMove(board,playersymbol)
	won = checkWon(board,winningstates)
	printBoard(board)
	turns += 1
	
############CONGATS TO WINNER############
if won:
	print("Congratulations, player", playersymbol+"!")
else:
	print("It's a tie!")