TypeDict "dict style" positional arguments

Hi.
I'm just curious why passing arguments to TypeDict is strictly constrained. I tried some variants including positional arguments style and failed. It's not reflected in docs or function signature (ctrl + p in Pycharm)
https://docs.python.org/3/library/typing.html#typing.TypedDict

In [1]: from typing import TypedDict                                                                                                                                                                       

In [2]:  
   ...: ProfileText = TypedDict(name='ProfileText', fields={'name': str, 'non variable key': str}, total=False)  # Error                                                                                   
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-2-7d3b7c9254f3> in <module>
----> 1 ProfileText = TypedDict(name='ProfileText', fields={'name': str, 'non variable key': str}, total=False)  # Error

TypeError: _typeddict_new() missing 1 required positional argument: 'typename'

In [3]:  
   ...: ProfileText = TypedDict('ProfileText', {'name': str, 'non variable key': str}, total=False)  # Error                                                                                               

In [4]:  
   ...: ProfileText = TypedDict('ProfileText', {'name': str, 'non variable key': str}, False)  # Error                                                                                                     
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-4-b3b55e028c98> in <module>
----> 1 ProfileText = TypedDict('ProfileText', {'name': str, 'non variable key': str}, False)  # Error

TypeError: _typeddict_new() takes from 2 to 3 positional arguments but 4 were given

In [5]:  

L’issue mentionne le point d’entrée TypedDict et la documentation de Python typing ; commencez par comparer les formes d’appel montrées, avec arguments nommés et positionnels, à cette documentation. Déterminez quelle convention d’appel doit être prise en charge, puis définissez l’achèvement comme un comportement, des informations de signature, une documentation et des tests cohérents pour la forme acceptée.