Bigger Price

Quiz>

You have a table with all available goods in the store.

The data is represented as a list of dicts

 

Your mission here is to find the TOP most expensive goods.

The amount we are looking for will be given as a first argument and the whole data as the second one

 

Input: 

int and list of dicts. Each dicts has two keys "name" and "price"

 

Output: 

the same as the second Input argument.

 

Example:

bigger_price(2, [

    {"name": "bread", "price": 100},

    {"name": "wine", "price": 138},

    {"name": "meat", "price": 15},

    {"name": "water", "price": 1}

]) == [

    {"name": "wine", "price": 138},

    {"name": "bread", "price": 100}

]



bigger_price(1, [

    {"name": "pen", "price": 5},

    {"name": "whiteboard", "price": 170}

]) == [{"name": "whiteboard", "price": 170}]

 

def bigger_price(limit: int, data: list) -> list:
    """
        TOP most expensive goods
    """
    # your code here
    return None


if __name__ == '__main__':
    from pprint import pprint
    print('Example:')
    pprint(bigger_price(2, [
        {"name": "bread", "price": 100},
        {"name": "wine", "price": 138},
        {"name": "meat", "price": 15},
        {"name": "water", "price": 1}
    ]))

    # These "asserts" using for self-checking and not for auto-testing
    assert bigger_price(2, [
        {"name": "bread", "price": 100},
        {"name": "wine", "price": 138},
        {"name": "meat", "price": 15},
        {"name": "water", "price": 1}
    ]) == [
        {"name": "wine", "price": 138},
        {"name": "bread", "price": 100}
    ], "First"

    assert bigger_price(1, [
        {"name": "pen", "price": 5},
        {"name": "whiteboard", "price": 170}
    ]) == [{"name": "whiteboard", "price": 170}], "Second"

    print('Done! Looks like it is fine. Go and check it')

 

Solve>

1. 모듈 임포트

from operator import itemgetter

2. 특정한 데이터를 기준으로 정렬해야되므로 key 매겨변수에 price를 주고 reverse를 True를 줘서 내림차순으로 

   정렬한다. 또한 정렬한 값을 슬라이싱해서 반환한다.

   itemgetter 모듈은 딕셔너리에 입력된 key 값과 value 값들을 정렬한다.

def bigger_price(limit: int, data: list):
    return sorted(data, key=itemgetter("price"), reverse=True)[:limit]

 

Code>

def bigger_price(limit: int, data: list):
    return sorted(data, key=itemgetter("price"), reverse=True)[:limit]

 

Example>

if __name__ == '__main__':
    from pprint import pprint
    print('Example:')
    pprint(bigger_price(2, [
        {"name": "bread", "price": 100},
        {"name": "wine", "price": 138},
        {"name": "meat", "price": 15},
        {"name": "water", "price": 1}
    ]))

    # These "asserts" using for self-checking and not for auto-testing
    assert bigger_price(2, [
        {"name": "bread", "price": 100},
        {"name": "wine", "price": 138},
        {"name": "meat", "price": 15},
        {"name": "water", "price": 1}
    ]) == [
        {"name": "wine", "price": 138},
        {"name": "bread", "price": 100}
    ], "First"

    assert bigger_price(1, [
        {"name": "pen", "price": 5},
        {"name": "whiteboard", "price": 170}
    ]) == [{"name": "whiteboard", "price": 170}], "Second"

    print('Done! Looks like it is fine. Go and check it')

 

Result>

Example:

[{'name': 'wine', 'price': 138}, {'name': 'bread', 'price': 100}]

Done! Looks like it is fine. Go and check it