Python Tic Tac Toe Game!!

#Tic Tac Toe Game for Python 3.x...
#Code by GameNationRDF, JMEAR......
import random
import sys
board = [0, 1, 2,
         3, 4, 5,
         6, 7, 8]
def displayBoard():
    print (board[0],("|"),board[1],("|"),board[2])
    print ("----------")
    print (board[3],("|"),board[4],("|"),board[5])
    print ("----------")
    print (board[6],("|"),board[7],("|"),board[8])
    print ("----------")
def checkLine(char, spot1, spot2, spot3):
    if board[spot1] == (char) and board[spot2] == (char) and board[spot3] == (char):
        return True
def checkAll(char):
    if   checkLine(char,0,1,2) == True:
        return True
    elif checkLine(char,3,4,5) == True:
        return True
    elif checkLine(char,6,7,8) == True:
        return True
    elif checkLine(char,0,3,6) == True:
        return True
    elif checkLine(char,1,4,7) == True:
        return True
    elif checkLine(char,2,5,8) == True:
        return True
    elif checkLine(char,0,4,8) == True:
        return True
    elif checkLine(char,2,4,6) == True:
        return True
while True:
    displayBoard()
    user_spot = int(input("Pick a spot: "))
    if board[user_spot] != ("X") and board[user_spot] != ("O"):
        board[user_spot]=("X")
        if checkAll("X")== True:
            print ("_-_- X WINS -_-_")
            break;
        while True:
            ai=random.randint(0,8)
            if board[ai] != ("O") and board[ai] != ("X"):
                board[ai] = ("O")
                break;
        if checkAll("O")== True:
            print ("_-_- O WINS -_-_")
            break;

    else:
        print ("That spot is taken!")