help(gravity.parameters) raises exception

[LourensVeen]

Describe the bug
The book says to use help(gravity.parameters) to show help for the parameters of a gravity code. If I do that (with Python 3.13, but I'm not sure that that's relevant), I get an exception instead of help.

To Reproduce
Steps to reproduce the behavior:

from amuse.community.brutus import Brutus
b = Brutus()
help(b.parameters)

Traceback (most recent call last):
  File "<python-input-3>", line 1, in <module>
    help(b.parameters)
    ~~~~^^^^^^^^^^^^^^
  File "<frozen _sitebuiltins>", line 103, in __call__
  File "/home/lourens/.miniconda3/envs/amuse-mpreal/lib/python3.13/pydoc.py", line 1992, in __call__
    self.help(request)
    ~~~~~~~~~^^^^^^^^^
  File "/home/lourens/.miniconda3/envs/amuse-mpreal/lib/python3.13/pydoc.py", line 2053, in help
    else: doc(request, 'Help on %s:', output=self._output, is_cli=is_cli)
          ~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/lourens/.miniconda3/envs/amuse-mpreal/lib/python3.13/pydoc.py", line 1759, in doc
    what = getattr(thing, '__qualname__', None)
  File "/home/lourens/NLeSC/projects/ReDiTSAp/software/amuse_lourens/src/amuse/datamodel/parameters.py", line 38, in __getattr__
    raise exceptions.CoreException(
    ...<2 lines>...
    )
amuse.support.exceptions.CoreException: tried to get unknown parameter '__qualname__' for a 'Brutus' object

Expected behavior
A clear and concise description of which parameters exist and what they mean.

Environment (please complete the following information):

• OS and version: Kubuntu 22.04
• Compiler: N/A

Additional context
Looking at parameters.py:35, there's two commented-out lines that seem like they could solve the problem, and indeed it works if I enable them again. Unfortunately there's no comment to explain why they're commented out, so I'm not sure if that breaks something else.

[rieder]

Specific for Brutus? Or also other community codes?
We should probably make a unittest for this.