<filename>src/__init__.py
from ._version import __version__
__all__ = ['spectroscopy', 'utils', 'transitfitting', 'jwst']

from .spectroscopy import *
from .transitfitting import *
from .utils import *
from .jwst import *

<filename>src/__init__.py
from ._version import __version__
__all__ = ['spectroscopy', 'utils', 'transitfitting', 'jwst']

from .spectroscopy import *
from .transitfitting import *
from .utils import *
from .jwst import *
