code: def docker_py_dict(self):
          
          return {
              'image': self.image,
              'command': self.cmd,
              'hostname': self.hostname,
              'user': self.user,
              'detach': self.detach,
              'stdin_open': self.open_stdin,
              'tty': self.tty,
              'ports': self.exposed_ports,
              'environment': self.env,
              'volumes': self.volumes,
              'network_disabled': self.network_disabled,
              'entrypoint': self.entry_point,
              'working_dir': self.working_dir,
              'domainname': self.domain_name,
              'labels': self.labels
          }
docs: Convert object to match valid docker-py properties.