解决ubuntu16.04 you are using pip version 8.1.1,however version 9.0.1 is available问题

使用wget安装成功，具体如下：
1.sudo apt-get update
2.sudo apt-get upgrade
3.wget https://bootstrap.pypa.io/get-pip.py

4.sudo python3 get-pip.py

apt-get install build-essential python-dev
pip install uwsgi