Django management command to delete Wagtail’s image renditions

delete_renditions.py

import os, shutil
from django.conf import settings
from django.core.management.base import BaseCommand, CommandError
from wagtail.images.models import Rendition

class Command(BaseCommand):

	def handle(self, *args, **options):
		renditions = Rendition.objects.all()
		if renditions:
			images_root = os.path.join(settings.MEDIA_ROOT, 'images')
			message = ['\n']
			message.append('This will REMOVE ALL IMAGE RENDITION FILES in {}!\n'.format(images_root))
			message.append(
				'Are you sure you want to do this?\n\n'
				"Type 'yes' to continue, or 'no' to cancel: "
			)
			if input(''.join(message)) != 'yes':
				raise CommandError("Remove renditions cancelled.")
			else:
				# doe het
				renditions.delete()
				shutil.rmtree(images_root)
				self.stdout.write('Done')	
		else:
			self.stdout.write('There are no image renditions')