return type same as class gives NameError.

[Antoon Pardon]

I have the following small module:

=-=-=-=-=-=-=-=-=-=-=-= 8< =-=-=-=-=-=-=-=-=-=-=-=-=

from typing import NamedTuple, TypeAlias, Union
from collections.abc import Sequence

PNT: TypeAlias = tuple[float, float]

class Pnt (NamedTuple):
     x: float
     y: float

     def __add__(self, other: PNT) -> Pnt:
         return Pnt(self[0] + other[0], self[1] + other[1])

=-=-=-=-=-=-=-=-=-=-=-= >8 =-=-=-=-=-=-=-=-=-=-=-=-=

But when I import this, I get the following diagnostic:

Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/home/sisc/projecten/iudex/problem.py", line 10, in <module>
     class Pnt (NamedTuple):
   File "/home/sisc/projecten/iudex/problem.py", line 14, in Pnt
     def __add__(self, other: PNT) -> Pnt:
                                      ^^^
NameError: name 'Pnt' is not defined. Did you mean: 'PNT'?


Can someone explain what I am doing wrong?