wxPython 安装说明差异很大；即使是官方说明也不起作用，并且出现 404 失败：
W: Failed to fetch http://apt.wxwidgets.org/dists/raring-wx/main/source/Sources 404 Not Found
W: Failed to fetch http://apt.wxwidgets.org/dists/raring-wx/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://apt.wxwidgets.org/dists/raring-wx/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
完成这项工作的最简单方法是什么？