PaddleSlim为什么要依赖强化学习库PARL？

>>> import paddleslim
WARNING:root:No module named 'parl'
/home/usr/anaconda3/envs/paddle/lib/python3.7/site-packages/_distutils_hack/__init__.py:33: UserWarning: Setuptools is replacing distutils.
  warnings.warn("Setuptools is replacing distutils.")