code: def get_contents_as_string(self, headers=None, cb=None, num_cb=10,
                                 torrent=False):
          
  
          fp = StringIO.StringIO()
          self.get_contents_to_file(fp)
          return fp.getvalue()
docs: Retrieve file data from the Key, and return contents as a string.
  
          :type headers: dict
          :param headers: ignored in this subclass.
  
          :type cb: function
          :param cb: ignored in this subclass.
  
          :type cb: int
          :param num_cb: ignored in this subclass.
  
          :type cb: int
          :param num_cb: ignored in this subclass.
  
          :type torrent: bool
          :param torrent: ignored in this subclass.
  
          :rtype: string
          :returns: The contents of the file as a string