Update train.py: avoids error on 'unique_bodyparts'#2668

MMathisLab merged 1 commit intoDeepLabCut:pytorch_dlcDeepLabCut/DeepLabCut:pytorch_dlcfrom

Saintgene-Xu-lab:pytorch-dlc-patch#2667Saintgene-Xu-lab/DeepLabCut:pytorch-dlc-patch#2667Copy head branch name to clipboard