def Welcome():

print(' *Welcome to tic-tac-toe game*')

#dont take sleep more than 2 seconds then user will get bored

sleep(1)

print()

print('Computer will decide who will play first')

print()

#for Hint Feature In Computer AI i have passed Player letter instead of computer letter

print('If you need Hint in the middle of game \npress any of this [Hint,hint,H,h]')

sleep(1)

print()

print(''' *** Format of Game **

| | 1 | 2 | 3

- - - - - - - - - - - -

| | 4 | 5 | 6

- - - - - - - - - - - -

| | 7 | 8 | 9

''')

#Fuction to draw Board

#you can modify this sleep method if you dont need it

def DrawBoard(board,NeedSleep=True):

#I thought for hint u dont need sleep method so i given default value for Needsleep

if NeedSleep:

sleep(1)

print()

print(' '+board[1]+' | '+board[2]+' | '+board[3])

print(' - - - - - - - ')

print(' '+board[4]+' | '+board[5]+' | '+board[6])

print(' - - - - - - - ')

print(' '+board[7]+' | '+board[8]+' | '+board[9])

print()

#asking the player to choose thier Letter (X or O)

def InputPlayerLetter():

letter=''

#Ask untill user enters x or o

while not(letter == 'X' or letter == 'O'):

print('Do you want to be X or O')

letter = input().upper()

#returning list bcz of later use

if letter == 'X':

return ['X','O']

if letter == 'O':

return ['O','X']

#Deciding who should play first randomly

#in usual tic-tac-toe games player first,but it selects randomly between computer and player

def WhoFirst():

opponents = ['computer','player']

if choice(opponents) == 'computer':

return 'computer'

else :

return 'player'

#this function asks player to play again

def PlayAgain():

print()

print('Do you want to Play Again (y or n)')

playagain = input().lower().startswith('y')

return playagain

#function for making move

def MakeMove(board,letter,move):

board[move] = letter

#check if any one win,returns True if wins

#In tic-tac-toe there are 8 possibilities of winning

#horizontal => 3 | vertical => 3 | diagonal => 2

def IsWinner(board,letter):

return ( (board[7] == letter and board[8] == letter and board[9] == letter ) or

(board[4] == letter and board[5] == letter and board[6] == letter ) or

(board[1] == letter and board[2] == letter and board[3] == letter ) or

(board[1] == letter and board[4] == letter and board[7] == letter ) or

(board[2] == letter and board[5] == letter and board[8] == letter ) or

(board[3] == letter and board[6] == letter and board[9] == letter ) or

(board[1] == letter and board[5] == letter and board[9] == letter ) or

(board[3] == letter and board[5] == letter and board[7] == letter ) )

#duplicate board is useful when we wanted to make temporary changes to the temporary copy of the board without changing the original board

def GetBoardCopy(board):

DupeBoard = []

for i in board:

DupeBoard.append(i)

return DupeBoard

#fuction to check is space is free

def IsSpaceFree(board,move):

return board[move] == ' '

#Getting the player move

def GetPlayerMove(board):

move = ''

while move not in '1 2 3 4 5 6 7 8 9'.split() or not IsSpaceFree(board,int(move)):

print()

print('Enter your move (1 - 9)')

move = input()

#if player wants Hint

if move in HintInput:

return move

break

return int(move)

#choose random move from given list

#it is used when AI wants to choose out of many possibilities

def ChooseRandomFromList(board,MoveList):

PossibleMoves = []

for i in MoveList:

if IsSpaceFree(board,i):

PossibleMoves.append(i)

if len(PossibleMoves) != 0:

return choice(PossibleMoves)

else:

return None

#creating computers AI

#this ai works on this algorithm

#1.it checks if computer can win in next move,else

#2.it checks if player can win in next move,then it blocks it,else

#3.it chooses any available spaces from the corner[1,3,7,9],else

#4.it fills middle square if space free,else

#5.it chooses any available spaces from sides,ie,[2,4,6,8]

#if you interchange the 3 and 4 steps the AI becomes little Hard,ie,it fills middle then corner

#--------------------------------------

#Get computer move

def GetComputerMove(board,ComputerLetter):

if ComputerLetter == 'X':

PlayerLetter = 'O'

else:

PlayerLetter = 'X'

#1.check computer can win in next move

for i in range(1,10):

copy = GetBoardCopy(board)

if IsSpaceFree(copy,i):

MakeMove(copy,ComputerLetter,i)

if IsWinner(copy,ComputerLetter):

return i

#2.check player can win in next move

for i in range(1,10):

copy = GetBoardCopy(board)

if IsSpaceFree(copy,i):

MakeMove(copy,PlayerLetter,i)

if IsWinner(copy,PlayerLetter):

return i

#3.checking for corner

move = ChooseRandomFromList(board,[1,3,7,9])

if move != None:

return move

#4.checking for the center

if IsSpaceFree(board,5):

return 5

#5.checking for sides

return ChooseRandomFromList(board,[2,4,6,8])

#---------------------------------------

#checking board is full or not

def IsBoardFull(board):

for i in range(1,10):

if IsSpaceFree(board,i):

return False

return True

#fuction to print the final win or tie board

#made this to separate usual board and winning or tie board

def FinalBoard(board,NeedSleep=True):

print(' |-------------|')

DrawBoard(board,NeedSleep)

print(' |-------------|')

#LETS START THE GAME

Welcome()

while True:

#intialising board

TheBoard = [' '] * 10

PlayerLetter,ComputerLetter = InputPlayerLetter()

turn = WhoFirst()

print(f'The {turn} will go first')

#gameloop

Playing = True

while Playing:

if turn == 'player':

print(f" Turn => {turn}")

HintInput = ['Hint','hint','H','h']

#taking players input

move = GetPlayerMove(TheBoard)

#if player needs Hint

while move in HintInput:

#following code gives hint to the user

#it runs player letter to computer AI

HintBox = []

for i in TheBoard:

HintBox.append(i)

hint = GetComputerMove(HintBox,PlayerLetter)

MakeMove(HintBox,PlayerLetter,hint)

print(f'HINT : placing at {hint} is better')

FinalBoard(HintBox,False)

move = GetPlayerMove(TheBoard)

MakeMove(TheBoard,PlayerLetter,move)

if IsWinner(TheBoard,PlayerLetter):

FinalBoard(TheBoard)

print('❤You have WON the game❤')

Playing = not Playing

elif IsBoardFull(TheBoard):

FinalBoard(TheBoard)

print('The game is TIE\nIts good to PLAY untill you WIN❤')

Playing = not Playing

else :

DrawBoard(TheBoard)

turn = 'computer'

else :

#computer move

print(f" Turn => {turn}")

move = GetComputerMove(TheBoard,ComputerLetter)

MakeMove(TheBoard,ComputerLetter,move)

if IsWinner(TheBoard,ComputerLetter):

FinalBoard(TheBoard)

print('❤Try again bro you will win❤')

Playing = not Playing

elif IsBoardFull(TheBoard):

FinalBoard(TheBoard)

print('The game is TIE\nIts good to PLAY untill you WIN❤')

Playing = not Playing

else :

DrawBoard(TheBoard)

turn = 'player'

if not PlayAgain():

print("***❤GIVE STAR ONLY IF YOU LIKE❤***")

break