play_tic_tac_toe

board=[['0','1','2'],
       ['3','4','5'],
       ['6','7','8']]

def print_board(board):
    for row in board:
        print(row)

def check_game(mark):
    #first let's check rows
    for i in range(3):
        if board[i][0]==mark and board[i][1]==mark and board[i][2]==mark:
            return True

    #then columns
    for i in range(3):
        if board[0][i]==mark and board[1][i]==mark and board[2][i]==mark:
            return True

    if board[0][0]==mark and board[1][1]==mark and board[2][2]==mark:
        return True
    if board[0][2]==mark and board[1][1]==mark and board[0][2]==mark:
        return True
        

def play_tic_tac_toe():
    current_player="1"
    mark="X"
    moves=0
    
    while (moves<9):
        print_board(board)

        print("player"+current_player+"move.")

        print("please enter the cell no:")
        cell=int(input())

        row=cell//3
        col=cell%3

        if board[row][col]!="X" and board[row][col]!="O":
              board[row][col]= mark
              moves+=1
              result=check_game(mark)
        else:
            print("this cell is already occupied!!, try  ANOTHER ONE.")
            continue

        if result:
            print("Player" +current_player+"has won the game")
            break

        if moves==9:
            print("!!!!Draw!!!!")

        if current_player=="1":
            current_player="2"
            mark="O"
        else:
            current_player="1"
            mark="X"

            

            
play_tic_tac_toe()