code: def status(self, core=None):
          
          params = {
              'action': 'STATUS',
          }
  
          if core is not None:
              params.update(core=core)
  
          return self._get_url(self.url, params=params)
docs: http://wiki.apache.org/solr/CoreAdmin#head-9be76f5a459882c5c093a7a1456e98bea7723953