How to use the nanogui.Alignment function in nanogui

for i in range(100)]
                graphDyn.setValues(valuesDyn)
                counter += 1
                # We must invoke perform layout from the screen instance to keep everything in order.
                # This is essential when creating tabs dynamically.
                self.performLayout()
                # Ensure that the newly added header is visible on screen
                tabWidget.ensureTabVisible(index)

        tabWidget.setCallback(tab_cb)
        tabWidget.setActiveTab(0);

        window = Window(self, "Grid of small widgets")
        window.setPosition((425, 300))
        layout = GridLayout(Orientation.Horizontal, 2,
                            Alignment.Middle, 15, 5)
        layout.setColAlignment(
            [Alignment.Maximum, Alignment.Fill])
        layout.setSpacing(0, 10)
        window.setLayout(layout)

        Label(window, "Floating point :", "sans-bold")
        floatBox = TextBox(window)
        floatBox.setEditable(True)
        floatBox.setFixedSize((100, 20))
        floatBox.setValue("50")
        floatBox.setUnits("GiB")
        floatBox.setDefaultValue("0.0")
        floatBox.setFontSize(16)
        floatBox.setFormat("[-]?[0-9]*\\.?[0-9]+")

        Label(window, "Positive integer :", "sans-bold")