code: def version(self):
          
          cmd = b"version\r\n"
          results = self._misc_cmd([cmd], b'version', False)
          before, _, after = results[0].partition(b' ')
  
          if before != b'VERSION':
              raise MemcacheUnknownError(
                  "Received unexpected response: %s" % results[0])
          return after
docs: The memcached "version" command.
  
          Returns:
              A string of the memcached version.