parameters: (self, planet_id)
return_statement: return self._planets.get(planet_id)
docstring: :param int planet_id:
          :return: The planet associated with planet_id
          :rtype: entity.Planet
docstring_summary: :param int planet_id:
          :return: The planet associated with planet_id
          :rtype: entity.Planet
docstring_tokens: : param int planet_id : : return : The planet associated with planet_id : rtype : entity . Planet
function: def get_planet(self, planet_id):
          """
          :param int planet_id:
          :return: The planet associated with planet_id
          :rtype: entity.Planet
          """
          return self._planets.get(planet_id)
function_tokens: def get_planet ( self , planet_id ) : return self . _planets . get ( planet_id )