windws7 environment python2.7 offline installation futures

The first reference https://www.cnblogs.com/beiluowuzheng/p/9085004.html

Find a long time actually did not find the bag concurrent

Reference https://www.cnblogs.com/kylinfish/articles/4352709.html

Baidu futures-2.1.6.tar.gz find Download https://pypi.org/project/futures/2.1.6/#files

安装：easy_install futures-2.1.6.tar.gz

确认：from concurrent import futures