code: def find(self, title):
          
          files = backend.iterfiles(self._drive, name=title)
          try:
              return next(self[id] for id, _ in files)
          except StopIteration:
              raise KeyError(title)
docs: Fetch and return the first spreadsheet with the given title.
  
          Args:
              title(str): title/name of the spreadsheet to return
          Returns:
              SpreadSheet: new SpreadSheet instance
          Raises:
              KeyError: if no spreadsheet with the given ``title`` is found