@ptrblck, Wow!! this is great support, I am coming from the world of Keras and Tensorflow, as I believe that Pytorch is much better.
couple of  questions:
1.- why allmost all the sample code I see in the web the do it like this:
resnet = models.resnet50(pretrained=True) and not like this other way? is there any advantage?
1.-  how can you find tune this type of model
2.- can you concatenate models as you do in keras ?
Thanks a lot!