code: def read_blacklist (self):
          
          with codecs.open(self.filename, 'r', self.output_encoding,
                           self.codec_errors) as fd:
              for line in fd:
                  line = line.rstrip()
                  if line.startswith('#') or not line:
                      continue
                  value, key = line.split(None, 1)
                  self.blacklist[key] = int(value)
docs: Read a previously stored blacklist from file fd.