import copy


def bulk_of_jsons(d):
    """Replace serialized JSON values with objects in a
    bulk array response (list).
    """

    def _f(b):
        for index, item in enumerate(b):
            if item is not None:
                b[index] = d(item)
        return b

    return _f


def decode_dict_keys(obj):
    """Decode the keys of the given dictionary with utf-8."""
    newobj = copy.copy(obj)
    for k in obj.keys():
        if isinstance(k, bytes):
            newobj[k.decode("utf-8")] = newobj[k]
            newobj.pop(k)
    return newobj