code: def save(self, fname):
          
          if not isinstance(fname, string_types):
              raise TypeError('fname need to be string')
          check_call(_LIB.MXSymbolSaveToFile(self.handle, c_str(fname)))
docs: Saves symbol to a file.
  
          You can also use pickle to do the job if you only work on python.
          The advantage of `load`/`save` functions is that the file contents are language agnostic.
          This means the model saved by one language binding can be loaded by a different
          language binding of `MXNet`.
          You also get the benefit of being able to directly load/save from cloud storage(S3, HDFS).
  
          Parameters
          ----------
          fname : str
              The name of the file.
  
              - "s3://my-bucket/path/my-s3-symbol"
              - "hdfs://my-bucket/path/my-hdfs-symbol"
              - "/path-to/my-local-symbol"
  
          See Also
          --------
          symbol.load : Used to load symbol from file.