<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def list_spiders(self, project):
 """ Lists all known spiders for a specific project. First class, maps to Scrapyd's list spiders endpoint. """

        url = self._build_url(constants.LIST_SPIDERS_ENDPOINT)
        params = {'project': project}
        json = self.client.get(url, params=params, timeout=self.timeout)
        return json['spiders']