How to use the dmsh.Rectangle function in dmsh

def test(show=False):
    geo = dmsh.Rectangle(0.0, 1.0, 0.0, 1.0)

    # p0 = dmsh.Path([[0.0, 0.0]])
    p1 = dmsh.Path([[0.4, 0.6], [0.6, 0.4]])

    def edge_size(x):
        return 0.03 + 0.1 * p1.dist(x)

    X, cells = dmsh.generate(geo, edge_size, show=show, tol=1.0e-10)

    ref_norms = [3.8844963377954718e02, 1.5689926870601147e01, 1.0000000000000000e00]
    assert_norm_equality(X.flatten(), ref_norms, 1.0e-3)
    return X, cells

def test_rectangle_hole():
    r = dmsh.Rectangle(60, 330, 380, 650)
    h = dmsh.Rectangle(143, 245, 440, 543)
    geo = dmsh.Difference(r, h)

    X, cells = dmsh.generate(geo, 20, tol=1.0e-5, show=False)

    ref_norms = [1.2901184909133780e05, 7.6243606395500592e03, 6.5000000000000000e02]
    assert_norm_equality(X.flatten(), ref_norms, 1.0e-10)

def test_large():
    # https://github.com/nschloe/dmsh/issues/11
    r = dmsh.Rectangle(-10.0, +20.0, -10.0, +20.0)
    c = dmsh.Circle([0.0, 0.0], 3)
    geo = dmsh.Difference(r, c)

    X, cells = dmsh.generate(geo, 2.0, tol=1.0e-5, max_steps=10000)

    ref_norms = [4.6422985179724637e03, 2.4202897690682192e02, 2.0000000000000000e01]
    assert_norm_equality(X.flatten(), ref_norms, 1.0e-4)

def test_union(show=False):
    geo = dmsh.Union(
        [dmsh.Rectangle(-1.0, +0.5, -1.0, +0.5), dmsh.Rectangle(-0.5, +1.0, -0.5, +1.0)]
    )
    X, cells = dmsh.generate(geo, 0.15, show=show, tol=1.0e-5)

    ref_norms = [1.8432376349018622e02, 1.1278734993846784e01, 1.0000000000000000e00]
    assert_norm_equality(X.flatten(), ref_norms, 1.0e-10)
    return X, cells