If you go to Python's default installer download page and click the nice yellow button as shown below, it will download you the 32 bit installer for the latest version of Python.
To get the 64 bit installer, you'd have to click into the link circled in red below and then scroll to the bottom to find the installer, e.g., for windows, it would be Windows x86-64 executable installer
Are most Python developers are still on 32 bit systems? Otherwise, why doesn't Python make the default installer for 64 bit? It certainly confused me for 30 mins, to install the 32 bit version, uninstall and then finally installing the 64 bit version.