allGuests = {'Alice': {'apples': 5, 'pretzels': '12'}, 'Bob': {'sendwiches': '3', 'apples': '12'}, 'Carol': {'cups': '3', 'apple pies': '1'}} def totalBrought(guests, item): numBrought = 0 for k, v in guests.items(): numBrought = numBrought + v.get(item, 0) return numBrought print('Number of things being brought: ') print(' - Apples ' + str(totalBrought(allGuests, 'apples'))) print(' - Cups ' + str(totalBrought(allGuests, 'cups'))) print(' - Sendwiches ' + str(totalBrought(allGuests, 'sendwiches'))) print(' - Pretzels ' + str(totalBrought(allGuests, 'pretzels')))

Conclusion:

 Traceback (most recent call last): File "C:/Users/eeNNdd11/PycharmProjects/course python/Что с собой принесли гости.py", line 17, in <module> print(' - Pretzels ' + str(totalBrought(allGuests, 'pretzels'))) File "C:/Users/eeNNdd11/PycharmProjects/course python/Что с собой принесли гости.py", line 9, in totalBrought numBrought = numBrought + v.get(item, 0) TypeError: unsupported operand type(s) for +: 'int' and 'str'

Closed due to the fact that off-topic participants 0xdb , Enikeyschik , andreymal , Kromster , freim May 2 at 10:53 .

It seems that this question does not correspond to the subject of the site. Those who voted to close it indicated the following reasons:

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    2 answers 2

    Learn to read the text of the error! It always states what the problem is.

    Here, for example:

     {'apples': 5, 'pretzels': '12'}

    In this code, 5 is the number 5, and '12' not the number 12, but the text "12". And so you got messed up everywhere. And the numbers and the text can not be folded.

    • Fixed a mistake with the data types, but the output of the entire program is as follows: Number of things being brought: - Apples 5 - sups 0 - Sendwiches 0 - Pretzels 12 in the dictionary indicates that cups = 3, and the output, their 0, could not explain why ? - Vyacheslav Bondarev

    Your data types are different, you need this:

     allGuests = {'Alice': {'apples': 5, 'pretzels': 12}, 'Bob': {'sendwiches': 3, 'apples': 12}, 'Carol': {'cups': 3, 'apple pies': 1}}
    • Fixed a mistake with the data types, but the output of the entire program is as follows: Number of things being brought: - Apples 5 - sups 0 - Sendwiches 0 - Pretzels 12 in the dictionary indicates that cups = 3, and the output, their 0, could not explain why ? - Vyacheslav Bondarev
    • @Vyacheslav Bondarev "return numBrought" is not in place. It should be on the same level with for, but like you, the iteration is performed only once for the first value of k, v. - Ghostik2005