from warnings import warn

from .. import getConfigOption


def getNumbaFunctions():
    if getConfigOption("useNumba"):
        try:
            import numba  # noqa
        except ImportError:
            warn("numba library could not be loaded, but 'useNumba' is set.")
            return None

        from .. import functions_numba
        return functions_numba
    else:
        return None