My code for Tic-Tac-Toe (beginner), compared to my mate that works at google's code.

Thought it would be interesting seeing someone beginner code, vs someone's professional code on the same project. After I sent him my code he replied with how he would have done it, as a comparison.

**My code:**

import random

def plyr1wintest(): #checks if player has 3 in a row
global winner
if (1 in plyr1list) and (2 in plyr1list) and (3 in plyr1list) or \
(4 in plyr1list) and (5 in plyr1list) and (6 in plyr1list) or \
(7 in plyr1list) and (8 in plyr1list) and (9 in plyr1list) or \
(1 in plyr1list) and (4 in plyr1list) and (7 in plyr1list) or \
(2 in plyr1list) and (5 in plyr1list) and (8 in plyr1list) or \
(3 in plyr1list) and (6 in plyr1list) and (9 in plyr1list) or \
(1 in plyr1list) and (5 in plyr1list) and (9 in plyr1list) or \
(3 in plyr1list) and (5 in plyr1list) and (7 in plyr1list):
print ((name1) + ' wins as X')
winner = True

def plyr2wintest(): #checks if player has three in a row
global winner
if (1 in plyr2list) and (2 in plyr2list) and (3 in plyr2list) or \
(4 in plyr2list) and (5 in plyr2list) and (6 in plyr2list) or \
(7 in plyr2list) and (8 in plyr2list) and (9 in plyr2list) or \
(1 in plyr2list) and (4 in plyr2list) and (7 in plyr2list) or \
(2 in plyr2list) and (5 in plyr2list) and (8 in plyr2list) or \
(3 in plyr2list) and (6 in plyr2list) and (9 in plyr2list) or \
(1 in plyr2list) and (5 in plyr2list) and (9 in plyr2list) or \
(3 in plyr2list) and (5 in plyr2list) and (7 in plyr2list):
print ((name2) + ' wins as O')
winner = True

def printboard(): #print board
print(' ')
print(' '+ position[0] +' | '+ position[1] +' | '+ position[2] + ' ' + ' '+ '1' +' | '+ '2' +' | '+ '3')
print('-----------' + ' ' + '-----------')
print(' '+ position[3] +' | '+ position[4] +' | '+ position[5] + ' ' + ' '+ '4' +' | '+ '5' +' | '+ '6')
print('-----------' + ' ' + '-----------')
print(' '+ position[6] +' | '+ position[7] +' | '+ position[8] + ' ' + ' '+ '7' +' | '+ '8' +' | '+ '9')
print(' ')

winner = False #win checker
movecount = 0 #counts amount of turns
playgame = True

print ('welcome to Noughts & Crosses') #title

while playgame == True:
position = [' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '] #sets the board spaces blank
plyr1list = []
plyr2list = []
gamelist = []

winner = False
movecount = 0

print (' ')
#Name input
print ('What is player 1s name?')
name1 = input()
print ('thanks '+ (name1) +', Whats player 2s name?')
name2 = input()
print ('so '+ (name1) +' is X and '+ (name2) + ' is O')
input("Press Enter to continue...")

printboard()

while (movecount < 9) and (winner == False):

if (movecount % 2 == 0): #player 1 turn

print ((name1) + 's ( X ) turn, please choose placement (1-9)')
move = input()
if move in ('1', '2', '3', '4', '5', '6', '7', '8', '9') and (int(move) not in (gamelist)):
plyr1list.append(int(move))
gamelist.append(int(move))
print (gamelist) #debug
position[int(move)-1] = ('X')
printboard()
movecount = movecount + 1
plyr1wintest()
elif move not in ('1', '2', '3', '4', '5', '6', '7', '8', '9'):
print ('That is not a valid move! Try again')
else: print ('That move is taken!, Try again')

else: #player 2 turn

print ((name2) + 's ( O ) turn, please choose placement (1-9)')

move = input()
if move in ('1', '2', '3', '4', '5', '6', '7', '8', '9') and (int(move) not in (gamelist)):
plyr2list.append(int(move))
gamelist.append(int(move))
print (gamelist) #debug
position[int(move)-1] = ('O')
printboard()
movecount = movecount + 1
plyr2wintest()
elif move not in ('1', '2', '3', '4', '5', '6', '7', '8', '9'):
print ('That is not a valid move! Try again')
else: print ('That move is taken!, Try again')

#end game
if winner == True:
print ('Congrats!')
else: print ('Its a tie BOI!')
print (' ')

#playagain
answer = 0
valid = False
print ('Would you like to play again (y/n)')
while valid == False: #waits until valid answer is submitted
answer = input()
if answer == 'y':
print ('aight, resetting...')
valid = True
elif answer == 'n':
print ('aight, cya')
print (' ') #ASCII art up in here cause why not
print(' * ,MMM8&&&. *')
print(' MMMM88&&&&& .')
print(' MMMM88&&&&&&&')
print(' * MMM88&&&&&&&&')
print(' MMM88&&&&&&&&')
print(' MMM88&&&&&&')
print(' MMM8&&& *')
print(' |\___/| ')
print(' ) ( . ')
print(' =\ /=')
print(' )===( Thanks for playing *')
print(' / \ ')
print(' | |')
print(' / \ ')
print(' \ / ')
print(' _/\_/\_/\__ _/_/\_/\_/\_/\_/\_/\_/\_/\_/\_ ')
print(' | | | |( ( | | | | | | | | | | ')
print(' | | | | ) ) | | | | | | | | | | ')
print(' | | | |(_( | | | | | | | | | | ')
print(' | | | | | | | | | | | | | | | ')
print(' By Me yay| | | | | | | | | ')
valid = True
playgame = False
else: print ('answer not valid, please use y or n')
#End

**His code:**

#!/usr/bin/python
"""Noughts and Crosses."""

import sys

def Input(*args):
"""Kludge to handle python 2 and 3."""
if sys.version_info.major >= 3:
return input(*args)
return raw_input(*args)

bye = r"""
* ,MMM8&&&. *
MMMM88&&&&& .
MMMM88&&&&&&&
* MMM88&&&&&&&&
MMM88&&&&&&&&
MMM88&&&&&&
MMM8&&& *
|\___/|
) ( .
=\ /=
)===( Thanks for playing *
/ \
| |
/ \
\ /
_/\_/\_/\__ _/_/\_/\_/\_/\_/\_/\_/\_/\_/\_
| | | |( ( | | | | | | | | | |
| | | | ) ) | | | | | | | | | |
| | | |(_( | | | | | | | | | |
| | | | | | | | | | | | | | |
By Me yay | | | | | | | | |
"""


def Play():
"""Play one round of noughts and crosses."""
position = [' ' for _ in range(9)]

print ("What is player 1's name?")
name1 = Input()
print ("Thanks %s, What's player 2's name?" % name1)
name2 = Input()
print ('So %s is X and %s is O.' % (name1, name2))
Input('Press Enter to continue...')

PrintBoard(position)

players = [(name1, 'X'), (name2, 'O')]