code: def index(self, *index):
          
          # .index() resets
          s = self._clone()
          if not index:
              s._index = None
          else:
              indexes = []
              for i in index:
                  if isinstance(i, string_types):
                      indexes.append(i)
                  elif isinstance(i, list):
                      indexes += i
                  elif isinstance(i, tuple):
                      indexes += list(i)
  
              s._index = (self._index or []) + indexes
  
          return s
docs: Set the index for the search. If called empty it will remove all information.
  
          Example:
  
              s = Search()
              s = s.index('twitter-2015.01.01', 'twitter-2015.01.02')
              s = s.index(['twitter-2015.01.01', 'twitter-2015.01.02'])