Home/ Questions/Q 8836969
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-14T09:36:47+00:00

What would be the best way/order to install both 32 and 64 bit versions

  • 0

What would be the best way/order to install both 32 and 64 bit versions of Python 2.7 and Python 3.3 if I want 64 bit Python 3.3 to be the default when I open .py files?

I already have the 32 bit version of each installed, with defaults set to Python 3.3.

If it is fine to just rename the directory of my currently installed version, will python27.dll and programmes using it (or python33.dll) continue to work? This library gets installed to %WINDIR%\System32 and/or %WINDIR%\SysWoW64 by the python installer.

Thanks for your answers, here is what I did:

  1. Uninstalled Python 3.3 (This left 2 files)
    • C:\Python33\Lib\lib2to3\Grammar3.3.0.final.0.pickle
    • C:\Python33\Lib\lib2to3\PatternGrammar3.3.0.final.0.pickle
  2. Uninstalled Python 2.7
  3. Installed Python 2.7 x86 (without register extensions)
    • C:\Python\27_32\
  4. Installed Python 2.7 x86-64 (without register extensions)
    • C:\Python\27\
  5. Installed Python 3.3 x86 (without register extensions)
    • C:\Python\33_32\
  6. Installed Python 3.3 x86-64 (with default register extensions)
    • C:\Python\33\
  7. Deleted C:\Python33
    • CCleaner’d installer reference issues to this location
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The installer typically has an option for “Set file associations” that handles that, and I think it’s on by default, which means that the most-recently-installed one will handle double-clicking .py files. So install 64-bit Python 3.3 last and it should work. I just did this a few days ago with 32- and 64-bit version of 2.7 and it seems to work fine.

    I wouldn’t rename your existing directory, though. You should install each version of Python in its own directory.

    • 0