I’m using a NamedTuple with comments as suggested for Python 3.6+:

class Config:
  buy_fee: float
  """My field description..."""
  # ...

Now I’d like to programmatically get the docstrings of the fields to generate a nice help message.

I tried to use inspect as follows:

[(f, inspect.getdoc(getattr(cls, f))) for f in cls._fields]

But I only get some default comment values: [('buy_fee', 'Alias for field number 0'), ...].

I tried to convert the class to a @dataclass and extract the docs with

[(f.name, inspect.getdoc(f)) for f in dataclasses.fields(cls)]

But this approach also failed, I got just [('buy_fee', None), ...].

Is there some way to achieve this?