DeepLabCut-core 
Core functionalities of DeepLabCut, excluding all GUI functions.
Currently up to date with DeepLabCut v2.1.8.1.
Install from GitHub:
pip git+https://github.com/DeepLabCut/DeepLabCut-core
PyPi:
pip install deeplabcutcore
Documentation is located at DeepLabCut's main GitHub page.