A tic tac toe in python3

tictactoe.py

class IllegalMoveError(ValueError):
	pass

class TicTacToe:
	
	def __init__(self):
		self.grid = [0 for i in range(9)]
		self.turn = "x"
	def run(self):
		while not self.isOver():
			print("")
			print("Next turn: '" + self.turn + "'")
			self.printGrid()
			move = input(">") #a1 b2
			try:
				self.doMove(move)
			except IllegalMoveError as e:
				print("You cannot do that move.")
		if self.hasWon("x"):
			print("X has won!")
		elif self.hasWon("o"):
			print("O has won!")
		else:
			print("It's a tie!")
	def printGrid(self):

		for i, x in enumerate(self.grid):
			if(i%3 == 0):
				print(chr(97 + i//3), end ="")
			print(" ", x, end="")
			if(i% 3 == 2):
				print("")
				print("  --------------")
			else:
				print(" |", end ="")
		print("   ", end ="")
		for i in range(3):
				print(i, "   ", end="")
		print("")

	def doMove(self, move):
		box = ((ord(move[0])- 97) * 3) + int(move[1])
		print(ord(move[0]), " -", ord(move[0])-97, " ", box)
		if self.grid[box] != 0 :
			raise IllegalMoveError()
		self.grid[box] = self.turn
		#Switch turn:
		if self.turn == "x":
			self.turn = "o"
		else:
			self.turn = "x"
	def isOver(self):
		if 0 not in self.grid:
			return True
		if self.hasWon("o") or self.hasWon("x"):
			return True
	def hasWon(self, el):
		return self.any([
						[0,4,8],
						[1,4,7],
						[2,4,6],
						[3,4,5],
						## Ends with middle
						## With top left:
						[0,3,6],
						[0,1,2],
						## With bottom right:
						[2,5,8],
						[6,7,8],
						],
						el)

	def any(self, winningCombinations, el):
		toRet = False
		for comb in winningCombinations:
			toRet = toRet or all(self.grid[x]==el for x in comb)
		return toRet

def main():
	game = TicTacToe()
	game.run()

if __name__ == "__main__":
	main()