code: def schedule(self, project, spider, settings=None, **kwargs):
          
  
          url = self._build_url(constants.SCHEDULE_ENDPOINT)
          data = {
              'project': project,
              'spider': spider
          }
          data.update(kwargs)
          if settings:
              setting_params = []
              for setting_name, value in iteritems(settings):
                  setting_params.append('{0}={1}'.format(setting_name, value))
              data['setting'] = setting_params
          json = self.client.post(url, data=data, timeout=self.timeout)
          return json['jobid']
docs: Schedules a spider from a specific project to run. First class, maps
          to Scrapyd's scheduling endpoint.