关于python 2.7:即使已安装模块也没有名为gevent的模块 | 码农家园
https://www.codenong.com/4919834612.10.2019 · no module named gevent even though it is installed. 操作系统:Ubuntu 16.04. Python 2.7. 1. 2. 3. pip list | grep gev. DEPRECATION: The default format will switch to columns in the future. You can use --format= (legacy|columns) (or define a format= (legacy|columns) in your pip.conf under the [list] section) to disable this warning.