AttributeError: 'tuple' object has no attribute 'softmax'

[allenlittlestar]

Traceback (most recent call last):
File "CAM3.py", line 69, in
h_x = F.softmax(logit, dim=1).data.squeeze()
File "/home/omnisky/anaconda2/envs/swin/lib/python3.7/site-packages/torch/nn/functional.py", line 1512, in softmax
ret = input.softmax(dim)
AttributeError: 'tuple' object has no attribute 'softmax'

When I put pytorch_ CAM. Py encountered the above problems when it was used in my own model. Do you know how to solve them? Thank you very much and look forward to your reply@Bolei Zhou