So if I do:
backboneV3= torchvision.models.inception_v3(pretrained=False)
backboneV3.eval()
x = torch.rand(1,3, 299, 299)
backboneV3(x)

this works fine. But if i try to slice the model in order to add the FasterRCNN it does not work anymore:
backboneV3_nofc  = nn.Sequential(*list(backboneV3.children())[:-1])
backboneV3_nofc.eval()
backboneV3_nofc(x)

I feel a bit lost…how should I slice the model?