def scale_units(out_unit, in_unit):
    """Deprecated function, moved to pysat.utils._core"""
    import warnings
    from pysat import utils
    warnings.warn(' '.join(['utils.computational_form is deprecated, use',
        'pysat.ssnl.computational_form instead']), DeprecationWarning,
        stacklevel=2)
    unit_scale = utils.scale_units(out_unit, in_unit)
    return unit_scale
