参考：

“pip install unroll”: “python setup.py egg_info” failed with error code 1

解决 Command "python setup.py egg_info" failed with error code 1 问题

在执行 pip install -r requirements.txt 时遇到错误：

Command "python setup.py egg_info" failed with error code 1

解决方法是更新 setuptools 和 pip：

pip install --upgrade setuptools

python -m pip install --upgrade pip

2018.9