how to code a tic tac toe game with ai python
#Tic Tac Toe game in python by techwithtim
board = [' ' for x in range(10)]
def insertLetter(letter, pos):
board[pos] = letter
def spaceIsFree(pos):
return board[pos] == ' '
def printBoard(board):
print(' | |')
print(' ' + board[1] + ' | ' + board[2] + ' | ' + board[3])
print(' | |')
print('-----------')
print(' | |')
print(' ' + board[4] + ' | ' + board[5] + ' | ' + board[6])
print(' | |')
print('-----------')
print(' | |')
print(' ' + board[7] + ' | ' + board[8] + ' | ' + board[9])
print(' | |')
def isWinner(bo, le):
return (bo[7] == le and bo[8] == le and bo[9] == le) or (bo[4] == le and bo[5] == le and bo[6] == le) or(bo[1] == le and bo[2] == le and bo[3] == le) or(bo[1] == le and bo[4] == le and bo[7] == le) or(bo[2] == le and bo[5] == le and bo[8] == le) or(bo[3] == le and bo[6] == le and bo[9] == le) or(bo[1] == le and bo[5] == le and bo[9] == le) or(bo[3] == le and bo[5] == le and bo[7] == le)
def playerMove():
run = True
while run:
move = input('Please select a position to place an 'X' (1-9): ')
try:
move = int(move)
if move > 0 and move < 10:
if spaceIsFree(move):
run = False
insertLetter('X', move)
else:
print('Sorry, this space is occupied!')
else:
print('Please type a number within the range!')
except:
print('Please type a number!')
def compMove():
possibleMoves = [x for x, letter in enumerate(board) if letter == ' ' and x != 0]
move = 0
for let in ['O', 'X']:
for i in possibleMoves:
boardCopy = board[:]
boardCopy[i] = let
if isWinner(boardCopy, let):
move = i
return move
cornersOpen = []
for i in possibleMoves:
if i in [1,3,7,9]:
cornersOpen.append(i)
if len(cornersOpen) > 0:
move = selectRandom(cornersOpen)
return move
if 5 in possibleMoves:
move = 5
return move
edgesOpen = []
for i in possibleMoves:
if i in [2,4,6,8]:
edgesOpen.append(i)
if len(edgesOpen) > 0:
move = selectRandom(edgesOpen)
return move
def selectRandom(li):
import random
ln = len(li)
r = random.randrange(0,ln)
return li[r]
def isBoardFull(board):
if board.count(' ') > 1:
return False
else:
return True
def main():
print('Welcome to Tic Tac Toe!')
printBoard(board)
while not(isBoardFull(board)):
if not(isWinner(board, 'O')):
playerMove()
printBoard(board)
else:
print('Sorry, O's won this time!')
break
if not(isWinner(board, 'X')):
move = compMove()
if move == 0:
print('Tie Game!')
else:
insertLetter('O', move)
print('Computer placed an 'O' in position', move , ':')
printBoard(board)
else:
print('X's won this time! Good Job!')
break
if isBoardFull(board):
print('Tie Game!')
while True:
answer = input('Do you want to play again? (Y/N)')
if answer.lower() == 'y' or answer.lower == 'yes':
board = [' ' for x in range(10)]
print('-----------------------------------')
main()
else:
break