title: Python TIC TAC TOE skipping turns
body: <p>I am working on a tic-tac-toe program in python. Now, the Human's turn work's fine. However, the AI, after playing the first turn, does not play any further turns. I have scanned through the code and cannot seem to find any errors that can cause this. </p>
  
  <p>Please ignore the comments and the part that deals with ties. I am still working on that. </p>
  
  <pre><code>import random
  import copy
  import sys
  
  
  the_board = [" "]*10
  
  
  def printboard(board):
      print(board[7] + " " + "|" + board[8] + " " + "|" + board[9])
      print("--------")
      print(board[4] + " " + "|" + board[5] + " " + "|" + board[6])
      print("--------")
      print(board[1] + " " + "|" + board[2] + " " + "|" + board[3])
  
  
  def choose_player():
      while True:
          player = input("What do you want to be; X or O?")
          if player == "X":
              print("You chose X")
              comp = "O"
              break
          elif player == "O":
              print("You chose O")
              comp = "X"
              break
          else:
              print("Invalid Selection")
              continue
      return [player, comp]
  
  
  def virtual_toss():
      print("Tossing to see who goes first.....")
      x = random.randint(0,1)
      if x== 0:
          print("AI goes first")
          move = "comp"
      if x == 1:
          print("Human goes first")
          move = "hum"
      return move
  
  
  def win(board,le):
      if (board[7] == le and board[8] == le and board[9]==le) or (board[4] == le and board[5]==le and board[6] == le)or (board[1] == le and board[2]==le and board[3] == le)or (board[7] == le and board[5]==le and board[3] == le)or (board[9] == le and board[5]==le and board[1] == le)or (board[7] == le and board[4]==le and board[1] == le)or (board[8] == le and board[5]==le and board[2] == le)or (board[9] == le and board[6]==le and board[3] == le):
          return True
      else:
          return False
  
  
  def make_move(board,number,symbol):
       board[number] = symbol
  
  
  def board_full(board):
      count = 0
      for item in board:
          if item in ["X","O"]:
              count+= 1
      if count ==9 :
          return True
      else:
          return False
  
  
  def valid_move(board,num):
      if board[num] == " ":
          return True
      else:
          return False
  
  
  def player_move(board):
      number = int(input("Enter the number"))
      return number
  
  
  def copy_board(board):
      copied_board = copy.copy(board)
      return copied_board
  
  
  def check_corner(board):
      if (board[7] == " ") or (board[9] == " ") or (board[1] == " ") or (board[3] == " "):
          return True
      else:
          return False
  
  
  def check_center(board):
      if (board[5] == " "):
          return True
      else:
          return False
  
  
  while True:
      count = 0
      loop_break = 0
      print("welcome to TIC TAC TOE")
      pla,comp = choose_player()
      turn = virtual_toss()
      while True:
          #printboard(the_board)
          if board_full(the_board) == True:
              again = input ("Game is a tie. Want to try again? Y for yes and N for No")
              if again == "Y":
                  loop_break = 6
                  break
              else:
                  system.exit()
  #if loop_break == 6:
      #continue 
  
          if turn == "hum":
  
  
              while True:
                      number = player_move(the_board)
                      if (valid_move(the_board,number) == True) and not(board_full == False):
                          make_move(the_board,number,pla)
                          #printboard(the_board)
                          break
                      else:
                          print("Invalid Move, try again!")
                          continue
              if (win(the_board,pla) == True):
                  print ("Yay, you won!!!")
                  printboard(the_board)
                  count = 1
                  loop_break = 7 
                  break
              else:
                  turn = "comp"
                  printboard(the_board)
                  continue
  
          else:
              copied_board = copy_board(the_board)
              for i in range(1,10):
                  make_move(copied_board,i,pla)
                  if(win(copied_board,pla) == True):
                      make_move(the_board,i,comp)
                      printboard(the_board)
                      turn = "hum"
                      loop_break = 1
                      break
                  else:
                      continue
              if loop_break == 1:
                  continue
              if (check_corner(the_board) == True) or (check_center(the_board)==True):
                  for i in [7,9,1,3,5]:
                      if(valid_move(copied_board,i)==True):
                          make_move(copied_board,i,comp)
                          if(win(copied_board,comp)==True):
                              make_move(the_board,i,comp)
                              printboard(the_board)
                              print("The AI beat you")
                              loop_break = 2
                              count = 1
                              break
                          else:
                              make_move(the_board,i,comp)
                              printboard(the_board)
                              turn = "hum"
                              loop_break = 3
                              break
                  if loop_break == 2:
                      break
                  elif loop_break == 3:
                      continue
                  else:
                      for i in [8,4,6,2]:
                          if(valid_move(copied_board,i)==True):
                              make_move(copied_board,i,comp)
                              if(win(copied_board,comp)):
                                  make_move(the_board,i,comp)
                                  printboard(the_board)
                                  print("The AI beat you")
                                  count = 1
                                  loop_break = 4
                                  break
                              else:
                                  make_move(the_board,i,comp)
                                  printboard(the_board)
                                  turn = "hum"
                                  loop_break = 5
                                  break
                  if loop_break == 4:
                      break
                  elif loop_break == 5:
                      continue
  
      if count == 1:
          again = input("Would you like to play again? y/n")
          if again == "y":
              continue
          else:
              system.exit()
  </code></pre>