Code can run with PyTorch1.7 now, and DCNv2, ONNX are OK.
cd DCNv2
./make.sh
python train.py --model=dla34 --dataset=buildings --bs=16 --iter=30000 --lr=0.01
python val.py --trained_model=weights/dla34_40000_0.01.pth
python detect.py --trained_model=weights/dla34_40000_0.01.pth --overlay