Basic application template in python with pyglet.

pyglet-application.py

import pyglet

# Define the application
class Application:
    
    # Define what should be created on initialisation
    def __init__(self):
        
        # Create a window
        self.window = pyglet.window.Window()
        # Push the application as an event handler.
        self.window.push_handlers(self)
        
        # Create an empty list of sprites.
        self.sprites = []
        
        # Create the draw-batch.
        self.batch = pyglet.graphics.Batch()        
    
    # Helpful function to add/create a sprite.
    def addSprite(self, img, x, y):
        # Create the sprite and add it to the draw-batch.
        sprite = pyglet.sprite.Sprite(img, x, y, batch=self.batch)
        # Add the sprite to our list we made earlier.
        self.sprites.append(sprite)
    
    # Draw event, called every draw-frame.
    def on_draw(self):
        # Clear the window.
        self.window.clear()
        # Draw everything using the batch.
        self.batch.draw()
    
    # TO ADD AN EVENT:
    def EVENT_NAME_HERE(EVENT, ARGS, HERE):
        # Code to run when this event happens.
        pass
    
    # Run the application.
    def run(self):
        pyglet.app.run()

# Check if the script is being run directly
if __name__ == "__main__":
    # Create an application instance.
    application = Application()
    # Run the application.
    application.run()