Hello, I started a project a long time ago using Pytorch 0.4.1. Now I am working on it again on PyTorch 1.0.
The code works on PyTorch 0.4.1 but not on 1.0. It breaks when I try to execute a forward() pass on the pretrained VGG network I had saved back on 0.4.1. It yields the following error message:
Traceback (most recent call last):
File "demo.py", line 186, in <module>
frame = process_frame(frame)
File "demo.py", line 151, in process_frame
age, gender = forward(input)
File "demo.py", line 113, in forward
age = age_model(input.to(device))
File "/home/diego/.local/lib/python3.6/site-packages/torch/nn/modules/module.py", line 489, in __call__
result = self.forward(*input, **kwargs)
File "/home/diego/.local/lib/python3.6/site-packages/torchvision/models/vgg.py", line 43, in forward
x = self.avgpool(x)
File "/home/diego/.local/lib/python3.6/site-packages/torch/nn/modules/module.py", line 535, in __getattr__
type(self).__name__, name))
AttributeError: 'VGG' object has no attribute 'avgpool'
The line for loading the model: torch.load("model/age_model.pth").to(device) .
I execute the forward pass like so:
with torch.no_grad():
age_model.eval() # we will only run inference on this model
age = age_model(input.to(device))
It’s worth noticing that the exact same code works on 0.4.1.
Thanks In advance for any help! 
P.S: The code also throws some warnings:
/home/diego/.local/lib/python3.6/site-packages/torch/serialization.py:435: SourceChangeWarning: source code of class 'torchvision.models.vgg.VGG' has changed. you can retrieve the original source code by accessing the object's source attribute or set `torch.nn.Module.dump_patches = True` and use the patch tool to revert the changes.
warnings.warn(msg, SourceChangeWarning)
/home/diego/.local/lib/python3.6/site-packages/torch/serialization.py:435: SourceChangeWarning: source code of class 'torch.nn.modules.container.Sequential' has changed. you can retrieve the original source code by accessing the object's source attribute or set `torch.nn.Module.dump_patches = True` and use the patch tool to revert the changes.
warnings.warn(msg, SourceChangeWarning)
/home/diego/.local/lib/python3.6/site-packages/torch/serialization.py:435: SourceChangeWarning: source code of class 'torch.nn.modules.conv.Conv2d' has changed. you can retrieve the original source code by accessing the object's source attribute or set `torch.nn.Module.dump_patches = True` and use the patch tool to revert the changes.
warnings.warn(msg, SourceChangeWarning)
/home/diego/.local/lib/python3.6/site-packages/torch/serialization.py:435: SourceChangeWarning: source code of class 'torch.nn.modules.activation.ReLU' has changed. you can retrieve the original source code by accessing the object's source attribute or set `torch.nn.Module.dump_patches = True` and use the patch tool to revert the changes.
warnings.warn(msg, SourceChangeWarning)
/home/diego/.local/lib/python3.6/site-packages/torch/serialization.py:435: SourceChangeWarning: source code of class 'torch.nn.modules.pooling.MaxPool2d' has changed. you can retrieve the original source code by accessing the object's source attribute or set `torch.nn.Module.dump_patches = True` and use the patch tool to revert the changes.
warnings.warn(msg, SourceChangeWarning)
/home/diego/.local/lib/python3.6/site-packages/torch/serialization.py:435: SourceChangeWarning: source code of class 'torch.nn.modules.linear.Linear' has changed. you can retrieve the original source code by accessing the object's source attribute or set `torch.nn.Module.dump_patches = True` and use the patch tool to revert the changes.
warnings.warn(msg, SourceChangeWarning)
/home/diego/.local/lib/python3.6/site-packages/torch/serialization.py:435: SourceChangeWarning: source code of class 'torch.nn.modules.dropout.Dropout' has changed. you can retrieve the original source code by accessing the object's source attribute or set `torch.nn.Module.dump_patches = True` and use the patch tool to revert the changes.
warnings.warn(msg, SourceChangeWarning)