manim-direct-execute-example.py

#!/usr/bin/env python3
  
from typing import List
from manim import *
import os
from manim.utils.file_ops import open_file as open_media_file
  
  
class SquareToCircle(Scene):
    def construct(self):
        circle = Circle()
        square = Square()
        square.flip(RIGHT)
        square.rotate(-3 * TAU / 8)
        circle.set_fill(PINK, opacity=0.5)

        self.play(Create(square))
        self.play(Transform(square, circle))
        self.play(FadeOut(square))

class TriangleToCircle(Scene):
    def construct(self):
        circle = Circle()
        square = Triangle()
        square.flip(RIGHT)
        square.rotate(-3 * TAU / 8)
        circle.set_fill(PINK, opacity=0.5)

        self.play(Create(square))
        self.play(Transform(square, circle))
        self.play(FadeOut(square))

show_scenes = [SquareToCircle, TriangleToCircle]
if __name__ == '__main__':
  for scene_class in show_scenes:
      scene = scene_class()
      scene.render()
      open_media_file(scene.renderer.file_writer.movie_file_path)