(lvl)
return smoother
Set up default, empty smoother.
Set up default, empty smoother.
Set up default empty smoother .
def setup_none(lvl):
    """Set up default, empty smoother."""
    def smoother(A, x, b):
        pass
    return smoother
def setup_none ( lvl ) : def smoother ( A , x , b ) : pass return smoother