code: def _load_meta(self, size, md5):
          
          if not hasattr(self, 'local_hashes'):
              self.local_hashes = {}
  
          self.size = int(size)
  
          if (re.match('^[a-fA-F0-9]{32}$', md5)):
              self.md5 = md5
docs: Set key attributes to retrived metadata. Might be extended in the
          future to support more attributes.