"""dgl optims."""
import importlib
import os
import sys

from ..backend import backend_name
from ..utils import expand_as_pair


def _load_backend(mod_name):
    mod = importlib.import_module(".%s" % mod_name, __name__)
    thismod = sys.modules[__name__]
    for api, obj in mod.__dict__.items():
        setattr(thismod, api, obj)


_load_backend(backend_name)