python创建虚拟环境，pip更新相关问题

 FreeBSD:

python -m venv /path/to/new/virtual/environment

比如：

python -m venv /home/euler/.myvenv

pkg search pip | less

sudo pkg install python-pip

 

upgrade pip:

http://stackoverflow.com/questions/55114425/ddg#69369139

/home/euler/.myvenv/bin/python -m pip install --upgrade pip