sudo apt-get install zlib1g-dev
sudo apt-get install lib32z1-dev
sudo apt-get install libxml2-dev libxslt1-dev
sudo apt-get install libxml2
sudo apt-get install python-dev
pip install lxml
virtualenv 安装 lxml
原文：http://www.cnblogs.com/outofthink/p/6159485.html
