Certainly! Here's a basic example of a Python app using the KivyMD library. This example creates a simple app with a single screen that displays a label and a button.

First, make sure you have the KivyMD library installed. You can install it using pip with the command `pip install kivymd`.

```python
from kivymd.app import MDApp
from kivymd.uix.screen import Screen
from kivymd.uix.label import MDLabel
from kivymd.uix.button import MDFlatButton


class MyApp(MDApp):
    def build(self):
        # Create the main screen
        screen = Screen()

        # Create a label
        label = MDLabel(text="Hello, KivyMD!", halign="center", theme_text_color="Secondary")

        # Create a button
        button = MDFlatButton(text="Click Me!", pos_hint={"center_x": 0.5, "center_y": 0.4}, on_release=self.on_button_click)

        # Add the label and button to the screen
        screen.add_widget(label)
        screen.add_widget(button)

        return screen

    def on_button_click(self, instance):
        print("Button clicked!")


if __name__ == "__main__":
    MyApp().run()
```

In this code, we create a class `MyApp` that inherits from `MDApp`, the base class provided by KivyMD for creating applications. The `build` method is overridden to define the app's UI.

Inside the `build` method, a `Screen` widget is created as the main screen. A `MDLabel` widget is created with the text "Hello, KivyMD!" and added to the screen. Next, a `MDFlatButton` widget is created with the text "Click Me!" and added to the screen. The `pos_hint` property is used to position the button at the center of the screen.

The `on_button_click` method is defined to handle the button click event. In this example, it simply prints a message.

Finally, we instantiate `MyApp` and call its `run` method to start the application.

When you run this code, it will display a window with the label "Hello, KivyMD!" and a button labeled "Click Me!". When you click the button, it will print "Button clicked!" to the console.

This is a basic starting point, and you can expand on it to create more complex applications using the KivyMD library.
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