def mouse_pressed(self, event):
        "Create fish at cursor and add to the smallest school."
        new_fish = Fish(vector.Vector2(event.x, event.y))
        min(self.schools, key=School.size).add_fish(new_fish)
Create fish at cursor and add to the smallest school.
recipes/Python/578007_processing_DEMO_Boids/recipe-578007.py