pipenv shell
pipenv install python==3.6.5
pipenv --rm
pipenv clean
pipenv update
pipenv lock
pip --default-timeout=100install -U [packageName]
pip install pyspark==2.1.2 --default-timeout=200
pipenv install --skip-lock
pip install pandas --default-timeout=2000 -i https://pypi.tuna.tsinghua.edu.cn/simple