import pyglet

window = pyglet.window.Window()

label = pyglet.text.Label('Hello, world', font_name='Times New Roman', font_size=36, x=window.width//2, y=window.height//2, anchor_x='center', anchor_y='center')

@window.event
def on_draw():
	window.clear()
	label.draw()

pyglet.app.run()

add pyglet example