Printing a gomoku board

print_gomoku_board.py

def print(self):
	header = '   '
	for x in range(self.size):
		if self.last_move is not None and x == self.last_move%self.size:
			header += '▼ '
		else:
			header += f'{x+1} '
	print(header)

	for y in range(self.size):
		row_name = y+1 if self.last_move is None or self.last_move//self.size != y else ' ►'
		row = f'{row_name:2} ' 
		for x in range(self.size):
			cell = self.board[self.size*y+x]
			if cell == Gomoku.BLACK:
					row += '○'
			elif cell == Gomoku.WHITE:
					row += '●'
			elif x == 0 and y == 0:
				row += '┌ '
			elif x == 0 and y == self.size-1:
				row += '└ '
			elif x == self.size-1 and y == 0:
				row += '┐'
			elif x == self.size-1 and y == self.size-1:
				row += '┘'
			elif x == 0:
				row += '├ '
			elif y == 0:
				row += '┬ '
			elif x == self.size-1:
				row += '┤'
			elif y == self.size-1:
				row += '┴ '
			else:
				row += '┼ '
		print(row)