Argparse + Enum + multiple choice

renderers_arg.py

from enum import Enum
import argparse

class Renderers(Enum):
    source_videos = 0  # values can be anything you need, e.g. specific Renderer classes / objects
    input_points = 1
    projection_points = 2
    
 parser = argparse.ArgumentParser()
 parser.add_argument(
    "--renderers",
    dest="renderers",
    help="Set renderers to use for video output. Choices: {}. Default: ['input_points', 'projection_points']".format(
        set(Renderers.__members__.keys())),
    metavar="RENDERER",
    default=[Renderers.input_points,
             Renderers.projection_points],
    choices=list(Renderers),
    nargs="+",
    action="extend",
    type=Renderers.__getitem__
)