EvilZone

Thank you for the response! I'll look into the issues you addressed, try to clean up the repetition, and reduce the usage of global variables. I highly appreciate your feedback and will take this opportunity to learn from my mistakes.

Hello Evilzone! First time poster, short time lurker here.  I have recently started digging into programming and went with Python! Just for educational purposes on my behalf, I want to post this Tic Tac Toe game I have been working on! I am open to any suggestions to improve what may seem like redundant code. Thanks in advance!

from random import randint
import time
import os #For pretty color reasons

raw_input("Welcome to tic-tac-toe! Press Entert to start:")
board = []
numTries, player_wins, computer_wins = 0, 0, 0

def makeBoard():
    global board
    for i in range(0, 10):
        board.append("[ ]")

def printBoard():
    #Print the game
    global board
    print board[1], board[2], board[3]
    print board[4], board[5], board[6]
    print board[7], board[8], board[9]
   
def move():
    #Prompt the player to make a move
    os.system("color a")
    global numTries
    numTries = 0
   
    #Take input and check if spot is available
    try:
        x = int(raw_input("\nIt's your turn(1-9):"))
        if not board[x] == "[X]" and not board[x] == "[O]":
            board[x] = "[X]"
        else:
            print "That spot is already chosen."
            move()
    except:
        print("You must have screwed up.")
        move()
    printBoard()
    checkForWin()
    time.sleep(.5)
    computeMove()
   
def computeMove():
    #Generate random spot on the board, make move if available
    os.system("color c")
    global numTries
    global board
    numTries += 1
    selection = randint(1, 9)
    if not board[selection] == "[X]" and not board[selection] == "[O]":
        board[selection] = "[O]"
        print ("\nComputer has chosen.")
   
    #AI - Place move against you -- each row has 3 combinations
    #Only executes if random move is unsuccessful on first try
    #Row 1
    elif board[1] == "[X]" and board[2] == "[ ]" and board[3] == "[X]":
        board[2] = "[O]"
    elif board[1] == "[ ]" and board[2] == "[X]" and board[3] == "[X]":
        board[1] = "[O]"
    elif board[1] == "[X]" and board[2] == "[X]" and board[3] == "[ ]":
        board[3] = "[O]"
    #Row 2
    elif board[4] == "[X]" and board[5] == "[ ]" and board[6] == "[X]":
        board[5] = "[O]"
    elif board[4] == "[ ]" and board[5] == "[X]" and board[6] == "[X]":
        board[4] = "[O]"
    elif board[4] == "[X]" and board[5] == "[X]" and board[6] == "[ ]":
        board[6] = "[O]"
    #Row 3
    elif board[7] == "[X]" and board[8] == "[ ]" and board[9] == "[X]":
        board[8] = "[O]"
    elif board[7] == "[ ]" and board[8] == "[X]" and board[9] == "[X]":
        board[7] = "[O]"
    elif board[7] == "[X]" and board[8] == "[X]" and board[9] == "[ ]":
        board[9] = "[O]"
    #Diagonal 1
    elif board[1] == "[X]" and board[5] == "[ ]" and board[9] == "[X]":
        board[5] = "[O]"
    elif board[1] == "[ ]" and board[5] == "[X]" and board[9] == "[X]":
        board[1] = "[O]"
    elif board[1] == "[X]" and board[5] == "[X]" and board[9] == "[ ]":
        board[9] = "[O]"
    #Diagonal 2
    elif board[3] == "[X]" and board[5] == "[ ]" and board[7] == "[X]":
        board[5] = "[O]"
    elif board[3] == "[ ]" and board[5] == "[X]" and board[7] == "[X]":
        board[3] = "[O]"
    elif board[3] == "[X]" and board[5] == "[X]" and board[7] == "[ ]":
        board[7] = "[O]"
    else:
        if numTries > 20:
            raw_input("It's a cat's game!")
            restart()
        computeMove()
    printBoard()
    checkForWin()
    move()
   
def checkForWin():
    #Define win combinations - 8 possible for each X and O
    global board
    global numTries
    global player_wins
    global computer_wins
    if board[1] == "[X]" and board[2] == "[X]" and board[3] == "[X]":
        raw_input("You win!")
        player_wins += 1
        restart()
    if board[4] == "[X]" and board[5] == "[X]" and board[6] == "[X]":
        raw_input("You win!")
        player_wins += 1
        restart()
    if board[7] == "[X]" and board[8] == "[X]" and board[9] == "[X]":
        raw_input("You win!")
        player_wins += 1
        restart()
    if board[1] == "[X]" and board[4] == "[X]" and board[7] == "[X]":
        raw_input("You win!")
        player_wins += 1
        restart()
    if board[2] == "[X]" and board[5] == "[X]" and board[8] == "[X]":
        raw_input("You win!")
        player_wins += 1
        restart()
    if board[3] == "[X]" and board[6] == "[X]" and board[9] == "[X]":
        raw_input("You win!")
        player_wins += 1
        restart()
    if board[1] == "[X]" and board[5] == "[X]" and board[9] == "[X]":
        raw_input("You win!")
        player_wins += 1
        restart()
    if board[3] == "[X]" and board[5] == "[X]" and board[7] == "[X]":
        raw_input("You win!")
        player_wins += 1
        restart()
   
    #Computer's combinations
    if board[1] == "[O]" and board[2] == "[O]" and board[3] == "[O]":
        raw_input("You LOSE!")
        computer_wins += 1
        restart()
    if board[4] == "[O]" and board[5] == "[O]" and board[6] == "[O]":
        raw_input("You LOSE!")
        computer_wins += 1
        restart()
    if board[7] == "[O]" and board[8] == "[O]" and board[9] == "[O]":
        raw_input("You LOSE!")
        computer_wins += 1
        restart()
    if board[1] == "[O]" and board[4] == "[O]" and board[7] == "[O]":
        raw_input("You LOSE!")
        computer_wins += 1
        restart()
    if board[2] == "[O]" and board[5] == "[O]" and board[8] == "[O]":
        raw_input("You LOSE!")
        computer_wins += 1
        restart()
    if board[3] == "[O]" and board[6] == "[O]" and board[9] == "[O]":
        raw_input("You LOSE!")
        computer_wins += 1
        restart()
    if board[1] == "[O]" and board[5] == "[O]" and board[9] == "[O]":
        raw_input("You LOSE!")
        computer_wins += 1
        restart()
    if board[3] == "[O]" and board[5] == "[O]" and board[7] == "[O]":
        raw_input("You LOSE!")
        computer_wins += 1
        restart()
       
def whoStarts():
    #If even number you start, odd number computer starts
    i = randint(0, 10)
    if i % 2 == 0:
        move()
    else:
        computeMove()
       
def restart():
    #Restart the game
    global board
    global player_wins
    global computer_wins
    os.system("color f")
    board = []
    print "\nYour score: ", player_wins
    print "Computer score: ", computer_wins
    raw_input("\n~~~~~~~~~~~~~~~~~~~~~~~~~Press Enter to play again!~~~~~~~~~~~~~~~~~~~~~~~~~")
    makeBoard()
    whoStarts()
   
if __name__ == "__main__":
    makeBoard()
    whoStarts()