python - Import submodule functions into the parent namespace -

i have package of commonly used utility functions import tons of different projects, using different parts. i'm following patterns i've seen in numpy, doing things like:

utils/     __init__.py         ```         . import math         . import plot         ```     math/         __init__.py             ```             . import core             . core import *             . import stats             . stats import *             __all__ = []             __all__.extend(core.__all__)             __all__.extend(stats.__all__)             ```         core.py             ```             __all__ = ['cfunc1', 'cfunc2']             def cfunc1()...             def cfunc2()...             ```         stats.py             ```             __all__ = ['sfunc1', 'sfunc2']             def sfunc1()...             def sfunc2()...             ```     plot/         __init__.py 

the nice thing structure can call submodule functions higher level namespaces, e.g. utils.math.cfunc1() , utils.math.sfunc2(). issue is: both core , stats take long time import, don't want automatically import them both math.__init__.

is there way not import both stats , core default, , instead use import utils.math.core, still have functions in core end in math namespace? i.e. able do:

import utils.math.core utils.math.cfunc1()