[Python-ideas] Add optional defaults to namedtuple

[Ethan Furman]

On 11/30/2016 02:32 AM, Jelte Fennema wrote:

> It would be nice to have a supported way to add defaults to namedtuple,
>  so the slightly hacky solution here does not have to be used:
>  http://stackoverflow.com/a/18348004/2570866

Actually, the solution right below it is better [1]:

--> from collections import namedtuple
--> class Node(namedtuple('Node', ['value', 'left', 'right'])):
-->     __slots__ = ()
-->     def __new__(cls, value, left=None, right=None):
-->         return super(Node, cls).__new__(cls, value, left, right)

But even more readable than that is using the NamedTuple class from my aenum [3] library (and on SO as [3]):

--> from aenum import NamedTuple
--> class Node(NamedTuple):
-->     val = 0
-->     left = 1, 'previous Node', None
-->     right = 2, 'next Node', None

shamelessly-plugging-my-own-solutions'ly yrs,
--
~Ethan~


[1] http://stackoverflow.com/a/16721002/208880
[2] https://pypi.python.org/pypi/aenum
[3] http://stackoverflow.com/a/40891597/208880