I'm writing code in python for a tic tac toe game. I have ran into a problem. can any one help me out. thanks

``````# TIC TAC TOE
# Started: 10/19/09
# Ended: still in progress

#GLOBAL CONSTANTS
X = "X"
O = "O"
Empty = " "
TIE = "TIE"
NUM_SQUARES = 9

def display_instruct():
"""Display game instructions."""
print \
"""
Welcome to the intellectual challenge of all time: Tic-Tac-Toe.
You will make your move know by entering a number, 0 - 8. The number
will correspond to the board position as illustrated:

0 | 1 | 2
_________

3 | 4 | 5
_________

6 | 7 | 8

Prepare yourself. The ultimate battle is about to begin. \n
"""

"""Ask a yes or no question."""
response = None
while response not in ("y", "n"):
response = raw_input(question).lower()
return response

"""Ask for a number within a range."""
response = None
while response not in range(low, high):
response = int(raw_input(question))
return response

def pieces():
"""Determine if Player 1 or Computer goes first."""
go_first = ask_yes_no("Do you require the first move? (y/n):")
if go_first == "y":
print "\nThen take the first move."
player1 = X
computer = O
else:
print "\nComputer will go first."
player2 = X
computer = O
return computer, player1

def new_board():
"""Create new game board."""
board = []
for square in range(NUM_SQUARES):
board.append(EMPTY)
return board

def display_board(board):
"""Display game board on screen."""
print "\n\t", board[0], "|", board[1], "|", board[2]
print "\t", "------"
print "\t", board[3], "|", board[4], "|", board[5]
print "\t", "------"
print "\t", board[6], "|", board[7], "|", board[8], "\n"

def legal_moves(board):
"""Create list of legal moves."""
moves =[]
for squares in range(NUM_SQUARES):
if board[square] == EMPTY:

moves.append(square)
return moves

def winner(board):
"""Determine the game winner."""
WAYS_TO_WIN = ((0, 1, 2),
(3, 4, 5),
(6, 7, 8),
(0, 3, 6),
(1, 4, 7),
(2, 5, 8),
(0, 4, 8),
(2, 4, 6))

for row in WAYS_TO_WIN:
if board[row[0]] == board[row[1]] == board[row[2]] != EMPTY:
winner = board[row[0]]
return winner

if EMPTY not in board:
return TIE

return None

def player1_move(board, player1):
"""Get Player 1 move."""
legal = legal_moves(board)
move = None
while move not in legal:
move = ask_number("Where will you move? (0 - 8): ", 0, NUM_SQUARES)
if move not in legal:
print "\nThat square is already occupied. Choose another.\n"
print "Fine..."
return move

def computer_move(board, computer, player1):
""" Make computer move."""
# make a copy to work with since function will be changing list
board = board[:]

# the best positions to have, in order
BEST_MOVES = (4, 0, 2, 6, 8, 1, 3, 5, 7)
print "I shall take square number",

# if computer can win, block that move
for move in legal_moves(board):
board[move] = computer
if winner(board) == computer:
print move
return move
# done checking this move, undo it
board[move] = EMPTY

# if player1 can win, block that move
for move in legal_moves(board):
board[move] = player1
if winner(board) == player1:
print move
return move
# done checking this move, undo it
board[move] = EMPTY

# since no one can win on next move, pick open square
for move in BEST_MOVES:
if move in legal_moves(board):
print move
return move
#done checking this move, undo it
board[move] = EMPTY

def next_turn(turn):
"""Switch turns."""
if turn == X:
return O
else:
return X

def congrat_winner(The_winner, computer, player1):
"""Congratulate the winner."""
if the_winner != TIE:
print the_winner, "won\n"
else:
print "It's a tie!\n"
if the_winner == computer:
print " Computer is great.\n"
elif the_winner == player1:
print "Player 1 is great.\n"
elif the_winner == TIE:
print "You two try again.\n"

def main():
display_instruct()
computer, player1 = pieses()
turn = X
board = new_board()
display_board(board)

while not winner(board):
if turn == player1:
move = player1_move(board, player1)
board[move] = player1

else:
turn == computer
move = computer_move(board, player2)
board[move] = computer

display_board(board)
turn = next_turn(turn)
the_winner = winner(board)
congrat_winner(the_winner , computer, player1)

# start the program
main()
raw_input("\n\nPress the enter key to quit.")
``````

Editor's note:
If you have an error please state the error message.

Also, use code tags with your code to preserve the indentations. Otherwise the code is very difficult to read and not too many folks will help.

for move in legal_moves(board):
board[move] = computer
if winner(board) == computer:
print move
return move

# done checking this move, undo it
board[move] = EMPTY

soooooo... what's your question :) ?
and Yes pls use code tags next time.... so much easier to read!

Just some obvious stuff:

Lines 124 to 140 have lost their indentations as a code block. They belong to function computer_move().

pieces is misspelled in line 172

squares should be square in line 76

You will also discover some runtime problems.

There's an error in your program:
***'return' outside function (line 129)

This code is straight out of the book. I was trying this before I changed it for a two player game. The book is "Python Programming, for the absolute beginner second edition"

There's an error in your program:
***'return' outside function (line 129)

You can not use return outside a function.

``````IDLE 2.6.2
>>> def a(x, y):
return x + y

>>> a(5, 8)
13
>>> x = 5
>>> y = 8
>>> return x + y #this you can not do because outside a function
SyntaxError: 'return' outside function
>>>``````

If you gone make change a code like this you have to understad the basic of python.
Make small changes and test it out.
Return outside a function will always give a error.