Week 17 - Tic Tac Toe Start by Flipping Coin

posted Mar 17, 2017, 8:26 AM by Attila Lengyel

import random

def drawBoard(board):
  print("    |   |   ")
  print(" ",board[0],"|",board[1],"|",board[2])
  print("    |   |   ")  
  print("-------------")
  print("    |   |   ")
  print(" ",board[3],"|",board[4],"|",board[5])
  print("    |   |   ")  
  print("-------------")
  print("    |   |   ")
  print(" ",board[6],"|",board[7],"|",board[8])
  print("    |   |   ")  

def win(board, player):
  if board[0] == player and board[1] == player and board[2] == player:
    return True
  if board[3] == player and board[4] == player and board[5] == player:
    return True
  if board[6] == player and board[7] == player and board[8] == player:
    return True
  if board[0] == player and board[3] == player and board[6] == player:
    return True
  if board[1] == player and board[4] == player and board[7] == player:
    return True
  if board[2] == player and board[5] == player and board[8] == player:
    return True
  if board[0] == player and board[4] == player and board[8] == player:
    return True
  if board[2] == player and board[4] == player and board[6] == player:
    return True
  
  return False

def opponent(sUser):
  if sUser == "O":
    return "X"
  return "O"

############## Strategy to move random ############
def randommove(board, sUser):
  emptystep = []
  for x in range(0,9):
    if board[x] == " ":
      emptystep.append(x)
  
  move = random.randint(0,len(emptystep)-1)
  move = emptystep[move]
  return move

############## Strategy to block win ############
def blockuser(board, sUser):
  for x in range(0,9):
    if board[x] == " ":
      board[x] = sUser
      isWin = win(board, sUser)
      board[x] = " "
      if isWin:
        return x
  return -1  
  
############## Check for tie ##################
def checktie(board):
  isTie = True
  for x in range(0,9):
    if board[x] == " ":
      isTie = False
  
  return isTie

############## Head or Tail ######################
def headtail():
  bet = input("Head or Tail:")
  flip = random.randint(0,1)
  if flip == 0:
    coin = "Head"
  else:
    coin = "Tail"
  
  if bet == coin:
    return True
  
  return False

############## User move ##################
def usermove(board, user):
  move = input("Make your move (1~9):")
  if board[int(move) - 1] != " ":
    print("You lost your move!!!")
  else:
    board[int(move) - 1] = user
  
  drawBoard(board)
  
  if win(board, user):
    print("The user ", user, "won!!!")
    return True
  
  if checktie(board):
    print("It is a tie")
    return True
    
  return False

  ############## Computer move ##################
def computermove(board, user):
  move = blockuser(board, user)
  if move == -1:
    move = randommove(board,opponent(user))
  
  board[move] = opponent(user)
  print("Computer moves", move + 1)
  
  drawBoard(board)
  
  if win(board, opponent(user)):
    print("The computer", opponent(user), "won!!!")
    return True
  
  if checktie(board):
    print("It is a tie")
    return True
  
  return False
################## Main Program ##################
tttBoard = [" "] * 9
drawBoard(tttBoard)

if headtail():
  print("You won, you will be X")
  user = "X"
else:
  print("You lost, you will be O")
  user = "O"
print("The computer is", opponent(user))

while(True):
  
  if user == "X":
    if usermove(tttBoard, user):break
    if computermove(tttBoard, user): break
  else:
    if computermove(tttBoard, user):break
    if usermove(tttBoard, user):break
    
  
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