Damine: The answer provided by Denis was correct, but is most helpful only in environments where you are developing projects with different prerequisite requirements. For that, you will want to use the Python virtual environment package, aided by virtualenvwrappor. <https://virtualenvwrapper.readthedocs.io/en/latest/>I also highly recommend PyCharm <https://www.jetbrains.com/pycharm/> which has built-in support for both. If you already have a license for Visual Studio, PTVS works too.
But in the general case, you may not need all that. The tool to do what you ask is built in an ships with all recent versions of Python3 for windows. It is the excellent Python louncher for Windows. <https://docs.python.org/3/using/windows.html#python-launcher-for-windows>You install all the versions of Python you want side-by-side in the normal manner. If you are running Jython or IronPython you will need to edit a configuration file, but for any version of CPython, it just works. If I recall correctly (I am typing this from my Ubuntu machine) the command to run pip for your Python 2.6 installation would be... > py 2.6 -m pip install romanclass On Sun, Oct 8, 2017 at 9:02 AM, Denis Akhiyarov <denis.akhiya...@gmail.com> wrote: > This is pywin32 mailing list, but generally you can use virtualenv or > conda environments to manage your multiple Python versions from the > command-line. Note that PTVS provides convenient ways to add multiple > environments to the same Python project from Visual Studio user interface. > In essence all these tools rely on "shadowing" the inactive Python paths > by prepending active Python paths to the %PATH% environment variable. > > On Sun, Oct 8, 2017 at 9:43 AM, Damien Sykes-Lindley < > dam...@dcpendleton.plus.com> wrote: > >> Hi, >> Is there any documentation I need to look at if I intend to use Python 2 >> and 3 on the same Windows machine? Specifically, how to switch versions, >> how to install things with Pip without causing conflicts etc. >> I can find such notes describing its use on a Linux system, but nothing >> for Windows. >> I understand they can at least coexist on the same machine without issues >> (thanks to different pathnames etc), but beyond that I haven’t a clue. >> Cheers. >> Damien. >> >> _______________________________________________ >> python-win32 mailing list >> python-win32@python.org >> https://mail.python.org/mailman/listinfo/python-win32 >> >> > > _______________________________________________ > python-win32 mailing list > python-win32@python.org > https://mail.python.org/mailman/listinfo/python-win32 > >
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