Method __neg__

src/__init__.py:8726–8727

(self)

        return m1.concat(self, m)

    def __neg__(self):
        return Matrix(-self.a, -self.b, -self.c, -self.d, -self.e, -self.f)

    def __nonzero__(self):
        return not (max(self) == min(self) == 0)