a blog app use python3.7 && django2.1
$ pip install virtualenv
$ virtualenv -p /usr/local/Cellar/python/3.7.0/bin/python3.7 ENV3.7
$ source /Users/ys/python-virtualenv/ENV3.7/bin/activate
$ pip list
pip (1.5.6)
setuptools (3.6)
$ sudo pipe3 install django
name yangshuai password woaini222