我稍微改变了你的程序流程。而不是得到所有的标题，然后价格，我要求的标题和价格为每个游戏的顺序，并存储在一个名单的dicts。我还添加了数量，这样您就不必硬编码10的限制。小事情，但你不需要str（input（）），因为它总是一个字符串。这里还有很多可以改进的地方，这只是一个开始。

# creating an empty list
games = []

# number of elements as input
while True:
    try:
        n = int(input("Enter number of game titles (followed by ENTER on the keyboard): "))
        break
    except ValueError:
        print("Please enter a valid number.")
        continue

# iterating till the range
for i in range(1, n+1):
    while True:
        try:
            print(f'Enter the name game#{i} (followed by ENTER on the keyboard):')
            title = input()
            print(f'Enter the price game#{i} (followed by ENTER on the keyboard):')
            price = float(input())
            print(f'Enter the quantity available for game#{i} (followed by ENTER on the keyboard):')
            quantity = int(input())
            games.append({
                'title': title,
                'price': price,
                'quantity': quantity,
            })
            break
        except ValueError:
            print('Invalid input. Try again.')
            continue

print('\nGAMES IN STOCK')
# to print list vertically
print('{:<10} {:<10} {:<10}'.format('TITLE', 'PRICE', 'IN-STOCK QTY'))
for d in games:
    print('{:<10} {:<10} {:<10}'.format(d['title'], d['price'], d['quantity']))

while True:
    game_to_purchase = input("Please enter the name of the game you would like to purchase: ")

    if game_to_purchase not in [g['title'] for g in games]:
        print("Game not found. Try again.\n")
        continue
    else:
        price = [g['price'] for g in games if g['title'] == game_to_purchase][0]
        copies_available = int([g['quantity'] for g in games if g['title'] == game_to_purchase][0])
        break

while True:
    try:
        num_copies = int(input("Please enter the number of copies you would like to purchase: "))
        if num_copies > copies_available:
            print(f"Sorry, there aren't enough copies. Please enter a number lower than {copies_available}.\n")
            continue
        else:
            break
    except ValueError:
        print("Sorry, that was an invalid input. Please try again.")
        continue

total_price = num_copies * price
print(f'The total for {num_copies} of {game_to_purchase} is ${total_price}')

输出：

Enter number of game titles (followed by ENTER on the keyboard): 2
Enter the name game#1 (followed by ENTER on the keyboard):
game1
Enter the price game#1 (followed by ENTER on the keyboard):
10
Enter the quantity available for game#1 (followed by ENTER on the keyboard):
5
Enter the name game#2 (followed by ENTER on the keyboard):
game2
Enter the price game#2 (followed by ENTER on the keyboard):
20
Enter the quantity available for game#2 (followed by ENTER on the keyboard):
3

GAMES IN STOCK
TITLE      PRICE      IN-STOCK QTY
game1      10.0       5         
game2      20.0       3         
Please enter the name of the game you would like to purchase: game2
Please enter the number of copies you would like to purchase: 2
The total for 2 of game2 is $40.0