windows下使用pycharm配置python2.7的virtualenv环境

1.下载python2.7

https://www.python.org/download/releases/2.7/

如果安装其他python版本，下载对应python版本。

2.创建环境(python2.7运行)

https://blog.csdn.net/hy245120020/article/details/50776197

参考：

https://www.cnblogs.com/jhao/p/6062497.html

Unofficial Windows Binaries for Python Extension Packages

https://www.lfd.uci.edu/~gohlke/pythonlibs/

Laboratory for Fluorescence Dynamics

荧光动力学实验室

http://pythonguidecn.readthedocs.io/zh/latest/dev/virtualenvs.html

https://blog.csdn.net/qq_28509513/article/details/80638823

https://www.cnblogs.com/jhao/p/6062497.html

https://blog.csdn.net/elegentbeauty/article/details/79871440

https://blog.csdn.net/lyy14011305/article/details/59500819