Python 如何使用dictionary中的前20个键将dictionary中的其余键打印到40

我是皮顿人，还是勒宁人。 这是我试过的第一件事，所以看起来像照片上的一样 但是他们告诉我使用一个只有前20个键的for循环作为一个范围，然后用这个循环打印另外20个键 我尝试对字典进行len，只使用前20个索引，但在使用它们作为键时遇到了问题

这就是打印菜单的外观

使用

输出：

food = [[i+1, menue[i + 1][0], "RM " + str(menue[i + 1][1])] for i in range(20)]
drinks = [[i, menue[i][0], "RM " + str(menue[i][1])] for i in range(41, 61)]

res = [x + y for x, y in zip(food, drinks)]
columns = ['NO', 'Food Name', 'Price', 'NO', 'Drink Name', 'Price']
print('*' * 28 + 'Order Foods & Drinks' + '*' * 28)
print(tabulate(res, headers=columns, tablefmt='grid'))
print('(M) Main Menu' + ' ' * 22 + '(P) Payment' + ' ' * 22 +  '(E) Exit')

---

你好你的问题我不清楚。“词典的前20个索引”是什么意思？字典中的条目可以按任何顺序存储，因此“前20个”本身没有意义。你的意思是你只想要20个，而你不在乎哪个？或者您想要数值最低的20？我也不知道你所说的“使用前20个键打印字典中其余的键，在本例中为40”是什么意思。如何使用一个键打印另一个键？你能举个例子吗？此外，您提到“在本例中为40”，但在您的数据中显示的键高达60？我正在尝试使用类似于此的东西，但它没有起作用。我尝试将范围（20，z+1，40）中的k的键更改为str z=len（menue）：如果k>=20:k在menue中。values（）：print（k）我也试过了，但这是所有列表的循环，因为我不知道怎么做，前20个是食物，其余的是饮料，所以我的想法是打印食物和饮料，关键是从1到20，从41到60，它们是40，这就是为什么我在这个例子中说40。

food = [[i+1, menue[i + 1][0], "RM " + str(menue[i + 1][1])] for i in range(20)]
drinks = [[i, menue[i][0], "RM " + str(menue[i][1])] for i in range(41, 61)]

res = [x + y for x, y in zip(food, drinks)]
columns = ['NO', 'Food Name', 'Price', 'NO', 'Drink Name', 'Price']
print('*' * 28 + 'Order Foods & Drinks' + '*' * 28)
print(tabulate(res, headers=columns, tablefmt='grid'))
print('(M) Main Menu' + ' ' * 22 + '(P) Payment' + ' ' * 22 +  '(E) Exit')

****************************Order Foods & Drinks****************************
+------+-------------------+----------+------+-------------------+---------+
|   NO | Food Name         | Price    |   NO | Drink Name        | Price   |
+======+===================+==========+======+===================+=========+
|    1 | Baklava           | RM 45.5  |   41 | Airan             | RM 8.5  |
+------+-------------------+----------+------+-------------------+---------+
|    2 | Dolma             | RM 43.5  |   42 | Coca-Cola         | RM 5.0  |
+------+-------------------+----------+------+-------------------+---------+
|    3 | Falafel           | RM 35.5  |   43 | Coffee Americano  | RM 6.5  |
+------+-------------------+----------+------+-------------------+---------+
|    4 | Fattoush          | RM 51.8  |   44 | Coffee Black Tea  | RM 6.5  |
+------+-------------------+----------+------+-------------------+---------+
|    5 | Foul meddamas     | RM 50.4  |   45 | Coffee Cappuccino | RM 6.0  |
+------+-------------------+----------+------+-------------------+---------+
|    6 | Grilled hhalloumi | RM 40.5  |   46 | Coffee Caramel    | RM 3.0  |
+------+-------------------+----------+------+-------------------+---------+
|    7 | Hummus            | RM 30.2  |   47 | Coffee Espresso   | RM 6.5  |
+------+-------------------+----------+------+-------------------+---------+
|    8 | Iraqi masgouf     | RM 50.8  |   48 | Coffee Lattr      | RM 5.5  |
+------+-------------------+----------+------+-------------------+---------+
|    9 | Kebab karaz       | RM 50.6  |   49 | Coffee Macchiato  | RM 5.0  |
+------+-------------------+----------+------+-------------------+---------+
|   10 | Knsfeh            | RM 32.95 |   50 | Coffee Mochachino | RM 6.5  |
+------+-------------------+----------+------+-------------------+---------+
|   11 | Kofta             | RM 37.5  |   51 | Fanta             | RM 5.0  |
+------+-------------------+----------+------+-------------------+---------+
|   12 | Manakeesh         | RM 35.6  |   52 | Milk              | RM 9.0  |
+------+-------------------+----------+------+-------------------+---------+
|   13 | Mansaf            | RM 32.2  |   53 | Sprite            | RM 5.0  |
+------+-------------------+----------+------+-------------------+---------+
|   14 | Moutabal          | RM 37.3  |   54 | Tea Ahmad         | RM 5.5  |
+------+-------------------+----------+------+-------------------+---------+
|   15 | Quwarmah Al Dajaj | RM 45.4  |   55 | Tea Black         | RM 4.0  |
+------+-------------------+----------+------+-------------------+---------+
|   16 | Shanklish         | RM 37.4  |   56 | Tea Lemon         | RM 4.5  |
+------+-------------------+----------+------+-------------------+---------+
|   17 | Shawarma          | RM 35.2  |   57 | Tea Lipton        | RM 5.0  |
+------+-------------------+----------+------+-------------------+---------+
|   18 | Shish tawook      | RM 39.5  |   58 | Tea Milk          | RM 6.0  |
+------+-------------------+----------+------+-------------------+---------+
|   19 | Taboulrh          | RM 45.8  |   59 | Tea Simba         | RM 8.5  |
+------+-------------------+----------+------+-------------------+---------+
|   20 | Um Ali            | RM 35.9  |   60 | Water             | RM 3.0  |
+------+-------------------+----------+------+-------------------+---------+
(M) Main Menu                      (P) Payment                      (E) Exit