How to use the hyperspy.components.Gaussian function in hyperspy

def test_access_component_by_index(self):
        m = self.model
        g1 = Gaussian()
        g2 = Gaussian()
        g2.name = "test"
        m.extend((g1, g2))
        nose.tools.assert_is(m[1], g2)

    @nose.tools.raises(ValueError)
    def test_get_component_wrong(self):
        m = self.model
        g1 = Gaussian()
        g2 = Gaussian()
        g2.name = "test"
        m.extend((g1, g2))
        m._get_component(1.2)

def test_component_name_when_append(self):
        m = self.model
        gs = [Gaussian(), Gaussian(), Gaussian()]
        m.extend(gs)
        nose.tools.assert_is(m['Gaussian'], gs[0])
        nose.tools.assert_is(m['Gaussian_0'], gs[1])
        nose.tools.assert_is(m['Gaussian_1'], gs[2])

def test_several_component_with_same_name(self):
        m = self.model
        gs = [Gaussian(), Gaussian(), Gaussian()]
        m.extend(gs)
        m[0]._name = "Gaussian"
        m[1]._name = "Gaussian"
        m[2]._name = "Gaussian"
        m['Gaussian']

def test_get_component_by_index(self):
        m = self.model
        g1 = Gaussian()
        g2 = Gaussian()
        g2.name = "test"
        m.extend((g1, g2))
        nose.tools.assert_is(m._get_component(1), g2)

def test_component_already_in_model(self):
        m = self.model
        g1 = Gaussian()
        m.extend((g1, g1))

def test_access_component_by_name(self):
        m = self.model
        g1 = Gaussian()
        g2 = Gaussian()
        g2.name = "test"
        m.extend((g1, g2))
        nose.tools.assert_is(m["test"], g2)

def test_get_component_by_component(self):
        m = self.model
        g1 = Gaussian()
        g2 = Gaussian()
        g2.name = "test"
        m.extend((g1, g2))
        nose.tools.assert_is(m._get_component(g2), g2)