practicepython.org; ex 24

tic_tac_toe.py

#!/usr/bin/python3.5

def grid(x=1, y=1):
	hor_line = ' ---'
	ver_line = '|   '
	print(hor_line*x)
	for i in range(y):
		print(ver_line*x+'|')
		print(hor_line*x)

def extract_size(s):
	x = int(s.split('x')[0])
	y = int(s.split('x')[1])
	return x,y

print('·-----------------------------·')
print('| WELCOME TO TIC TAC TOW GAME |')
print('·-----------------------------·')
print('\nCurrently the game is not ready to play, but you still however can choose your board\'s size.')

size = input('enter the board size (in \'a x b\' format)')

grid(*extract_size(size))