def cube_pkg_mod_cls(cube):
    '''
    Used to dynamically importing cube classes
    based on string slug name.

    Converts 'pkg_mod' -> pkg, mod, Cls

    eg: tw_tweet -> tw, tweet, Tweet

    Assumes `Metrique Cube Naming Convention` is used

    :param cube: cube name to use when searching for cube pkg.mod.class to load
    '''
    _cube = cube.split('_')
    pkg = _cube[0]
    mod = '_'.join(_cube[1:])
    _cls = ''.join([s[0].upper() + s[1:] for s in _cube[1:]])
    return pkg, mod, _cls