同階層、あるいはサブディレクトリにある `.json` ファイルを `import` できるようにする `__init__.py`

__init__.py

"""{description_for_this_resources_module}"""

import os
from os.path import join, dirname, relpath, isdir, splitext
from glob import iglob
import sys
from types import ModuleType
from typing import Any
from warnings import warn

from json import load


def initialize(base: str | None = None, key: str = __name__):
  base = base or dirname(__file__)

  this = sys.modules.get(key, ModuleType(key, None))

  for json in iglob(join(base, "*.json"), recursive=False):
    rp, _ = splitext(relpath(json, base))

    with open(json) as f:
      data: dict[str, Any] = load(f)

    if not isinstance(data, dict):
      warn(f"Invalid data in {json}, expected '{dict}', but got '{type(json)}'", RuntimeWarning)
      continue

    if data is None:
      continue

    key_path = f"{key}.{rp}"

    sys.modules[key_path] = mod = ModuleType(key_path, data.get('__doc__', None))
    setattr(this, rp, mod)

    for k, v in data.items():
      setattr(mod, k, v)

  for d in (f for f in os.listdir(base) if isdir(join(base, f))):
    initialize(join(base, d), f"{key}.{d}")


sys.modules[__name__] = ModuleType(__name__, __doc__)
initialize()