def get_or_create_exh_obj(full_cname=False, exclude=None, callables_fname=None):
    r
    if not hasattr(__builtin__, "_EXH"):
        set_exh_obj(
            ExHandle(
                full_cname=full_cname, exclude=exclude, callables_fname=callables_fname
            )
        )
    return get_exh_obj()