`createEmpty` code fails at runtime when targeting python

[MangelMaxime]

I don't know if createEmpty is expected to work the same in Python as in JavaScript but currently I get an error when trying to run the code.

Description

open Fable.Core
open Fable.Core.PyInterop


type IUser = 
    abstract Name : string with get, set
    abstract Age : int with get, set

let user = createEmpty<IUser>
user.Name <- "Kaladin"
user.Age <- 20

generates

from __future__ import annotations
from abc import abstractmethod
from typing import Protocol

class IUser(Protocol):
    @property
    @abstractmethod
    def Age(self) -> int:
        ...

    @Age.setter
    @abstractmethod
    def Age(self, __arg0: int) -> None:
        ...

    @property
    @abstractmethod
    def Name(self) -> str:
        ...

    @Name.setter
    @abstractmethod
    def Name(self, __arg0: str) -> None:
        ...


user: IUser = None

user.Name = "Kaladin"

user.Age = 20

When running the code I have this error:

> python3 program.py
Traceback (most recent call last):
  File "/Users/mmangel/Downloads/testNodeFable/program.py", line 29, in <module>
    user.Name = "Kaladin"
    ^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'Name'

Related information

• Fable version: 4.1.4
• Operating system