from random import randint

while True:

  board = [] # board is the variable, the brackets are a list of values and/or variables

  for x in range(6): # this is a loop
      board.append(["O"] * 6)

  def print_board(board):
      for row in board:
          print((" ").join(row))
  test_mode = input("Do you want to play the test mode? Enter y for yes or n for no:") # here we are setting a variable, we use input to assign letters
  print("Let's play Battleship!")
  print_board(board)

  def random_row(board):
      return randint(0, len(board) - 1)
  def random_col(board):
      return randint(0, len(board[0]) - 1)

  ship_row = random_row(board)
  ship_col = random_col(board)

  if test_mode == "y" or test_mode == "Y": # here we are setting an if statement to see if the user is using test mode or not
    print("The battleship is at row:" , ship_row+1) # here i have printed the co-ordinates of the ship row when the user is in test mode
    print("The battleship is at col:" , ship_col+1) # here i have printed the co-ordinates of the ship column when the user is in test mode
    print("You are now in test mode, goodluck") # here i have printed the message you will recieve when pressing "y" or "Y"
  else:
      print("You are not in test mode, goodluck") # here i have printed the message you will recieve when pressing "n" or "N"

  for turn in range(9):
      print("Turn", turn + 1) # i've added +1 to the variable because python index starts at 0
      print("Guess between 1-6")
      ship_row_ship_col = input ("Enter your row and column guess using a comma between both:")
      ship_row_ship_col = (ship_row_ship_col.split(","))
      guess_row = int(ship_row_ship_col[0]) -1 # here we are setting new coordinates for the board, it's now 1-6 rather than 0-5
      guess_col = int(ship_row_ship_col[1]) -1

      if guess_row == ship_row and guess_col == ship_col:
          print("Congratulations! You sunk my battleship!")
          break
      else:
          if (guess_row < 0 or guess_row > 5) or (guess_col < 0 or guess_col > 5):
              print("Oops, that's not even in the ocean.")
          elif(board[guess_row][guess_col] == "X"):
              print("You guessed that one already.")
          else:
              print("You missed my battleship!")
              board[guess_row][guess_col] = "X"
      if turn == 8:
          print("Game Over")
          print("The Battleship was located at this position") # here i have printed where the battleship is at the end of the game if the player has not found the battleship by the end of the game
          board[ship_row][ship_col] = "*" # here will dislay "*" on the board where the battleship was for this game

      turn =+ 1
      print_board(board)

    end_game = input("Do you want to play again?")
    if end_game == "y" or end_game == "Y":
      print("Thanks for playing")
      break