windows 安装
在非官官方库
找到对应的python-igraph
pip install python_igraph-0.7.1.post6-cp36-none-win_amd64.whl
python-igraph在绘图的时候依赖pycairo模块
linux
pip3 install python_igraph 下载到了user/.local/python3.5,原因未知
失败方式：
sudo add-apt-repository ppa:igraph/ppa
sudo apt-get update # update your package database
sudo apt-get install python-igraph
pycairo
pip install pycairo -i https://pypi.tuna.tsinghua.edu.cn/simple
sudo pip install cairocffi -i https://pypi.tuna.tsinghua.edu.cn/simple
查找
whereis
dpkg -L python-igraph
pip3 show python-igraph
