Get from a dictionary the value using selectors

get_from_dict_using_selectors.py

from functools import reduce
from operator import getitem



def get_from_dict(d, selectors):
    """
    Retrieves the value of the nested key indicated by the given selector list from a dictionary or list.

    - Use functools.reduce() to iterate over the selectors list.
    - Apply operator.getitem() for each key in selectors, retrieving the value to be used as the iteratee for the next iteration.

    users = {
        'freddy': {
            'name': {
                'first': 'fred',
                'last': 'smith'
            },
        'postIds': [1, 2, 3]
        }
    }
    get(users, ['freddy', 'name', 'last']) # 'smith'
    get(users, ['freddy', 'postIds', 1]) # 2
    """
    return reduce(getitem, selectors, d)