上面的都是windows系统平台的安装包，哇，有没有后宫三千，不知道“临幸”哪一个的感觉~.~
看了下面的你就明白啦。
毫无疑问，x86适合32位操作系统；x86-64适合64位操作系统。然后呢，下面是官网的一些解释：
https://www.python.org/downloads/release/python-350/
- The binaries for AMD64 will also work on processors that implement
the Intel 64 architecture. (Also known as the "x64" architecture, and
formerly known as both "EM64T" and "x86-64".) They will not work on
Intel Itanium Processors (formerly "IA-64").
- Windows users: If installing Python 3.5 as a non-privileged user,
you may need to escalate to administrator privileges to install an
update to your C runtime libraries.
- Windows users: There are now "web-based" installers for Windows
platforms; the installer will download the needed software components at
installation time.
- Windows Users: There are redistributable zip files containing the
Windows builds, making it easy to redistribute Python as part of another
software package. Please see the documentation regarding Embedded
Distribution for more information.It is intended for acting as part of
another application, rather than being directly accessed by end-users.
简单的说就是有下面3种途径获取python：
web-based installer 是需要通过联网完成安装的
executable installer 是可执行文件(*.exe)方式安装
embeddable zip file 嵌入式版本，可以集成到其它应用中。
上面3种途径，如果有网络，可以选择web-based；