Environment

• Hardware Environment(Ascend/GPU/CPU):

Uncomment only one /device <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/device ascend
/device gpu
/device cpu

• Software Environment:
  -- MindSpore version (source or binary):
  -- Python version (e.g., Python 3.7.5):
  -- OS platform and distribution (e.g., Linux Ubuntu 16.04):
  -- GCC/Compiler version (if compiled from source):

Related testcase

Steps to reproduce the issue

1. remove name arg from gradoperation

Describe the current behavior

remove name arg from gradoperation

Describe the expected behavior

remove name arg from gradoperation

Related log / screenshot

Special notes for this issue