module 'cpp_functions' has no attribute 'backward_input'

[jinxixiang]

Hi, I ran the example code but got errors:
trimmed_output.backward(trimmed_grad)
File "/usr/local/lib64/python3.6/site-packages/torch/tensor.py", line 185, in backward
torch.autograd.backward(self, gradient, retain_graph, create_graph)
File "/usr/local/lib64/python3.6/site-packages/torch/autograd/init.py", line 127, in backward
allow_unreachable=True) # allow_unreachable flag
RuntimeError: module 'cpp_functions' has no attribute 'backward_input'

Any helps, please?

[hanspinckaers]

Hi @jinxixiang, this is a bug. Please use this cpp_functions file:

https://github.com/DIAGNijmegen/pathology-streaming-pipeline/blob/master/streaming/torch_utils/cpp_functions.cpp

Let me know if that one works 🙂

[jinxixiang]

Thank you, Hans. It works fine now.