How to access a field of a namedtuple using a variable for the field name?

Question

I can access elements of a named tuple by name as follows(*):

from collections import namedtuple
Car = namedtuple(\'Car\', \'color mileage\')
my_car = Car(\'         


        

Answer 1

since python version 3.6 one could inherit from typing.NamedTuple

class HistoryItem(tp.NamedTuple):
    inp: str
    tsb: float
    rtn: int
    frequency: int = None

    def __getitem__(self, item):
        if isinstance(item, str):
            return getattr(self, item)
        return tp.NamedTuple.__getitem__(self, item)
        # return super().__getitem__(item)

    def get(self, item, default=None):
        try:
            return self[item]
        except (KeyError, AttributeError):
            return default

then both item[num] or item["fld_name"] will work