在Cygwin上构建Python并不简单 - 但是，Python社区的bug跟踪网站对于其规模和重要性的项目来说是非常友好和温和的。如果您发现具体问题，打开错误并按照讨论。通常，他们会接受小补丁来修复Cygwin构建问题。

Building Python on Cygwin is not trivial -- I tried. However, the Python community on its bug tracker website is unusually friendly and gentle for a project its size and importance. If you find specific issues, open bugs and follow the discussion. Usually, they will accept tiny patches to fix Cygwin build issues.

这个补丁将解决你的第一个关于 si-> si_band 的问题。请参阅相关的Python问题＃21085 。

This patch will solve your first problem about si->si_band. See related Python issue #21085.

此博文（德语）令人惊叹。它将逐步介绍如何构建Python3.4并修复所有Cygwin问题。

This blog post (in German) is amazing. It will walk you through step-by-step how to build Python3.4 and fix all Cygwin issues.

祝你好运。您将需要它。

Good luck. You will need it.