问如何在__init__.py中将Sphinx autodoc配置为文档类？

EN

from __future__ import annotations
import sys
import re
from typing import Iterator, ...
import pyparsing as p

__all__ = ['Xxx']

class XxxData:
    """It is a class XxxData."""
    def __init__(self):
        self.data = dict()

    def get_foo(self, foo) -> str:
        """Get foo bar.
        
        Parameters
        ----------
        foo : str
            It is just a string.

        Returns
        -------
        str
            It is just a string.
        """
        return f'{foo} bar'

class Xxx():
    """It is a class Xxx."""
    def __init__(self):
        super().__init__()
        self._something = 'something'

    def parse_bar(self, bar) -> XxxData:
        """Parse bar.

        Parameters
        ----------
        bar : str
            It is just a string.

        Returns
        -------
        XxxData
            It is a return object of XxxData.

        """
        print(f'Hello {bar}')
        data = XxxData()
        return data

import os
import sys
sys.path.insert(0, os.path.abspath('../..'))

extensions = [
    'sphinx.ext.autodoc',       # Core library for html generation from docstrings
    'sphinx.ext.autosummary',   # Create neat summary tables
    'sphinx.ext.napoleon',      # Support for NumPy and Google style docstrings
]
autosummary_generate = True  # Turn on sphinx.ext.autosummary

autodoc_default_options = {
    'show-inheritance': False,
    'members': True,
    'member-order': 'bysource',
    'special-members': '__init__',
    'undoc-members': True,
    'exclude-members': '__weakref__'
}
autoclass_content = 'both'

docs
|-Makefile
|-build
|-make.bat
|-source
  |-_static
  |-_templates
  |-conf.py
  |-index.rst
packages
|-pss
  |-src/dd
    |-ps
      |-xxx
        |-__init__.py

sphinx-apidoc -o source/api/ ../packages/pss/src/dd/ps/ --implicit-namespaces -e -M -P

ps.xxx package
==============

.. automodule:: ps.xxx
   :members:
   :undoc-members:
   :show-inheritance:
   :private-members:

WARNING: autodoc: failed to import module 'xxx' from module 'ps'; the following exception was raised:
No module named 'ps.xxx'; 'ps' is not a package