IndexError: invalid index of a 0-dim tensor. Use tensor. item() to convert a 0-dim tensor to a Python

Report errors ：

running_loss += loss.data[0]

Traceback (most recent call last):
  File "/B/Practice/csdncifar-10.py", line 98, in <module>
    running_loss += loss.data[0]
IndexError: invalid index of a 0-dim tensor. Use tensor.item() to convert a 0-dim tensor to a Python number

change ：

running_loss += loss.item ()