How to use the clifford.basis_vectors function in clifford

Vhat = self.gradeInvol()
        Vrev = ~self
        Vinv = Vrev/(self*Vrev)[()]

        # Test if the versor inverse (~V)/(V * ~V) is truly the inverse of the
        # multivector V
        if (Vhat*Vinv).grades(eps=0.000001) != {0}:
            return False
        if not np.sum(np.abs((Vhat*Vinv).value - (Vinv*Vhat).value)) < 0.0001:
            return False

        # applying a versor (and hence an invertible blade) to a vector should
        # not change the grade
        if not all(
            (Vhat*e*Vrev).grades(eps=0.000001) == {1}
            for e in cf.basis_vectors(self.layout).values()
        ):
            return False

        return True

def basis_vectors(self):
        return cf.basis_vectors(self)