code: def _make_symbol_function(handle, name, func_name):
      
      code, doc_str = _generate_symbol_function_code(handle, name, func_name)
  
      local = {}
      exec(code, None, local)  # pylint: disable=exec-used
      symbol_function = local[func_name]
      symbol_function.__name__ = func_name
      symbol_function.__doc__ = doc_str
      symbol_function.__module__ = 'mxnet.symbol'
      return symbol_function
docs: Create a symbol function by handle and function name.