def list_images(self):
<EOL>data = os.listdir(CONU_IMAGES_STORE)<EOL>output = []<EOL>for name in data:<EOL><INDENT>output.append(self.ImageClass(name, pull_policy=ImagePullPolicy.NEVER))<EOL><DEDENT>return output<EOL>
list all available nspawn images

:return: collection of instances of :class:`conu.backend.nspawn.image.NspawnImage`