Python软件基金会宣布，到2020年元旦，已经不再为编程语言Python 2.x分支提供任何支持，是时候跟随Python 3的脚步了。
Let's not play games with semantics. The way I see the situation for 2.7 is that EOL is January 1st, 2020, and there will be no updates, not even source-only security patches, after that date. Support (from the core devs, the PSF, and python.org) stops completely on that date. If you want support for 2.7 beyond that day you will have to pay a commercial vendor. Of course it's open source so people are also welcome to fork it. But the core devs have toiled long enough, and the 2020 EOL date (an extension from the originally annouced 2015 EOL!) was announced with sufficient lead time and fanfare that I don't feel bad about stopping to support it at all.
推荐直接上Python科学计算的发行版Anaconda，以下安装配置步骤在WIN10 64位系统上测试没有问题。
不安装OpenSSL的话，pip就没法用。
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
