tictactoe3x3AI_second.py

import random

board =[" "for i in range(9)]

def print_board():
    row1 = '|{}|{}|{}|'.format(board[0],board[1],board[2]) 
    row2 = '|{}|{}|{}|'.format(board[3],board[4],board[5]) 
    row3 = '|{}|{}|{}|'.format(board[6],board[7],board[8])

    print()
    print(row1)
    print(row2)
    print(row3)
    print()
      
def User_move(icon):
    if icon == "X":
        number = 1
    print('Your turn player {}'.format(number))
    choice=int(input('enter your move (1-9)').strip())
    if board[choice-1] == " ": # if user type the same number 
        board[choice-1] = icon
    else:
        print()      
        print( ' That space is taken ')

def Cpu_move(icon):
    if icon == "O":
        number = 1
    choiceCpu=Cpu_select(board)
    if board[choiceCpu] == " ":
        print('Turn of computer {}'.format(number))
        board[choiceCpu] = icon
    else:
        Cpu_move(icon)

def Cpu_select(board):
    return random.randrange(0,9)
        
def is_victory(icon):        
    if(board[0]== icon and board[1]==icon and board[2]==icon) or\
      (board[3]== icon and board[4]==icon and board[5]==icon) or\
      (board[6]== icon and board[7]==icon and board[8]==icon) or\
      (board[0]== icon and board[3]==icon and board[6]==icon) or\
      (board[1]== icon and board[4]==icon and board[7]==icon) or\
      (board[2]== icon and board[5]==icon and board[8]==icon) or\
      (board[0]== icon and board[4]==icon and board[8]==icon) or\
      (board[2]== icon and board[4]==icon and board[6]==icon):
        return True
    else:
        return False

def is_draw():
    if ' ' not in board:
        return True
    else:
        return False

def game_start():
    print("게임을 시작합니다.")    
    while True: # game loop- running forever
        print_board()
        User_move('X')
        print_board()
        if is_victory("X"):
            print('X Wins! Congratulations!')
            break
        elif is_draw():
            print('its a draw!')
            break
        Cpu_move('O')
        if is_victory("O"):
            print_board()
            print('O Wins! Congratulations!')
            break
        elif is_draw():
            print('its a draw!')
            break