Grid doesn't show up like in the video lecture

import random
import string

class Card:
    def __init__(self, value, location):
        self.value = value
        self.location = location
        self.matched = False

    def __eq__(self, other):
        return self.value == other.value

    def __str__(self):
        return f'{self.value}'


class Game:
    def __init__(self, size=0):
        print('--- Welcome to Memory Game! ---')
        print('--- Please enter an even number for the board size! ---')
        self.size = size
        self.locations = []
        self.cards = []

        while self.size < 4 or self.size > 12 or self.size % 2 != 0:
            self.size = int(input('Enter valid size of the board: '))

        self.card_options = ['Add', 'Boo', 'Cat', 'Dev',  'Egg', 'Far',
                             'Gum', 'Hut', 'Foo', 'Dog', 'Bar', 'Baz']  # maximum of 12 cards
        self.columns = list(string.ascii_uppercase)[:self.size]

        for column in self.columns:
            for num in range(1, self.size + 1):
                self.locations.append(f'{column}{num}')

    def create_cards(self):
        used_locations = []
        used_cards = []

        for num in range(self.size):
            random_card = random.choice(self.card_options)
            used_cards.append(random_card)
            self.card_options.remove(random_card)

        for card in used_cards:
            for i in range(2):
                random_location = random.choice(
                    list(set(self.locations) - set(used_locations)))
                used_locations.append(random_location)
                game_card = Card(card, random_location)
                self.cards.append(game_card)

    def create_rows(self, num):
        row = []

        for column in self.columns:
            for card in self.cards:
                if card.location == f'{column}{num}':
                    if card.matched:
                        row.append(str(card))
                    else:
                        row.append('   ')

        return row

    def create_board(self):
        header = ' |  ' + '  |  '.join(self.columns) + '  |'
        print(header)

        for row in range(1, (self.size + 1)):
            print_row = f'{row}| '
            get_row = self.create_rows(row)
            print_row += ' | '.join(get_row) + ' |'

            print(print_row)

    def check_match(self, loc1, loc2):
        pass

    def start():
        pass


if __name__ == '__main__':
    game = Game()
    print(game.create_cards())
    print(game.create_board())