centos安装（http://www.qt4.net/gevent-install-failure/）
yum install python-devel
pip install greenlet
pip install gevent
http://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/001407503089986d175822da68d4d6685fbe849a0e0ca35000 原文：http://www.cnblogs.com/lly-lly/p/6048401.html