noughts & crosses [python]

#USER: TCG
#Naughts & Crosses

import time
import random

#Defines Grid
#function is used so that the can be replaced into it's original form when user asks to replay
def grid_function():
    global g
    g = ["",
    "  ----------------------------------",
    "  |          |          |          |",
    "  |     1    |     2    |     3    |",
    "  |          |          |          |",
    "  ----------------------------------",
    "  |          |          |          |",
    "  |     4    |     5    |     6    |",
    "  |          |          |          |",
    "  ----------------------------------",
    "  |          |          |          |",
    "  |     7    |     8    |     9    |",
    "  |          |          |          |",
    "  ----------------------------------"]
    print '\n'.join(g)

#REPLAY GAME / EXIT GAME

def replay():
    global turn1l,turn2l
    while True:
        restart = raw_input("\nWould you like to replay (yes/no) : ")
        if restart == "yes":
            i = 0
            turn1l = []
            turn2l = []
            grid_function()
            return 1
        elif restart == "no":
            print '\n' "Thanks for playing!"
            time.sleep(2)
            raise SystemExit()
        else:
            print '\n' "Incorrect input! Please enter either \"yes\" or \"no\""

#CHECKS IF THERE IS A WINNER

def winner_checker():

    def winner_checker_2(x,x1,x2):

        #All possilble wins
        winner = ("147", "123", "258", "369", "456", "789", "159", "357")
        if any(all(y in x for y in numbers) for numbers in winner):

            print '\n' * 5, x1, "YOU HAVE WON! GG TO", x2, '\n'
            if replay() == 1:
                return 1

    if winner_checker_2(turn1l,xplayer,name) == 1:
        return 3
    if winner_checker_2(turn2l,name,xplayer) == 1:
        return 3


#DISPLAY PLAYER'S MOVE

def print_grid_thing(n1,n2,x1,x2,x3):
    if g[2] in n1 and g[3] in n2:
        g[2] = x1
        g[3] = x2
        g[4] = x3
    elif g[6] in n1 and g[7] in n2:
        g[6] = x1
        g[7] = x2
        g[8] = x3
    elif g[10] in n1 and g[11] in n2:
        g[10] = x1
        g[11] = x2
        g[12] = x3
    print '\n' * 40, '\n'.join(g)

def display(x,px1,px2,px3,x1,x2,x3,x4):
    if x == move:
        #Replace the spaces with 'x'
        pxx1 = px1[:x1] + "\ /" + px1[x3:]
        pxx2 = px2[:x2] + "x" + px2[x4:]
        pxx3 = px3[:x1] + "/ \\" + px3[x3:]
        print_grid_thing(px1,px2,pxx1,pxx2,pxx3)
        return 2

def display2(x,px1,px2,px3,x1,x2,x3,x4):
    if x == move:
        #Replace the spaces with 'o'
        pxx1 = px1[:x1] + "---" + px1[x3:]
        pxx2 = px2[:x2] + "|   |" + px2[x4:]
        pxx3 = px3[:x1] + "---" + px3[x3:]
        print_grid_thing(px1,px2,pxx1,pxx2,pxx3)
        return 2

#Header
header = '''
------------------------------------------
|                                        |
|            KNOTS & CROSSES             |
|                                        |
------------------------------------------'''
print header, '\n'

#Asks for input

name1 = raw_input("Enter name of player 1 : ")
name2 = raw_input("Enter name of player 1 : ")

print'\n' "CHOOSING PLAYERS..."
time.sleep(1)

#xplayer is assigned from randomly choosing between name1 & name2
xplayer = random.choice((name1,name2))

#Display's who's playing with either naughts and crosses
print'\n', xplayer, "You are playing with Crosses"
if name1 != xplayer:
    name = name1
elif name2 != xplayer:
    name = name2
print name,"You are playing with Noughts",'\n'

#print grid
print "         HERE IS THE GRID :" '\n'
grid_function()
print

#Initiliaize lists

turn1l = []
turn2l = []

#PLAYER 1/2 INPUTS

while True:
    #assigned value to avoid NameError's & reset for replay
    space_taken = 0
    reloop = 0
    loop_count = 0
    for each in ((xplayer,name)*5):
        if space_taken == 1:
            move = raw_input("\n %s The space has already been taken \n \n"
                             "Enter it again, using a number from the grid : " % each)
            space_taken = 0

        else:
            move = raw_input("%s It's your turn, enter a number from the grid : " % each)

        if move !="1"and move !="2"and move !="3"and move !="4"and move !="5"and move !="6"and move !="7"and move !="8"and move !="9":
            print '\n' "Invalid Input, please enter an available a number from the grid"
            continue
        if move in turn2l or move in turn1l:
                space_taken
                continue
        if each == xplayer:
            if (display("4",g[6],g[7],g[8],7,8,10,9) == 2 or display("1",g[2],g[3],g[4],7,8,10,9) == 2 or display("7",g[11],g[12],g[13],7,8,10,9) == 2 or
                display("2",g[2],g[3],g[4],18,19,21,20) == 2 or display("5",g[6],g[7],g[8],18,19,21,20) == 2 or display("8",g[10],g[11],g[12],18,19,21,20) == 2 or
                display("3",g[2],g[3],g[4],29,30,32,31) == 2 or display("6",g[6],g[7],g[8],29,30,32,31) == 2 or display("9",g[10],g[11],g[12],29,30,32,31) == 2):

                turn1l.append(move)
        if each == name:
            if (display2("4",g[6],g[7],g[8],7,6,10,11) == 2 or display2("1",g[2],g[3],g[4],7,6,10,11) == 2 or display2("7",g[10],g[11],g[12],7,6,10,11) == 2 or
                display2("2",g[2],g[3],g[4],18,17,21,22) == 2 or display2("5",g[6],g[7],g[8],18,17,21,22) == 2 or display2("8",g[10],g[11],g[12],18,17,21,22) == 2 or
                display2("3",g[2],g[3],g[4],29,28,32,33) == 2 or display2("6",g[6],g[7],g[8],29,28,32,33) == 2 or display2("9",g[10],g[11],g[12],29,28,32,33) == 2):

                turn2l.append(move)

        if winner_checker() == 3:
            reloop = 1
            break

        if loop_count == 8:
            print '\n' * 5
            print "******* The match was a draw *******" '\n'
            if replay() == 1:
                reloop = 1
                break
            break
        loop_count += 1

    if reloop!= 1:
        break