On Sun, Feb 26, 2017 at 3:09 PM, ChrisW <c.c.w...@gmail.com> wrote: > On Saturday, 25 February 2017 07:21:30 UTC, eryk sun wrote: >> On Fri, Feb 24, 2017 at 12:38 PM, ChrisW wrote: >> > However, I've installed Python 3.6 with the 'include PATH' checkbox ticked >> > for my user only, and although C:\Windows\py.exe exists, it has not been >> > added to my PATH. >> > >> > I also tried installing for all users, and this also doesn't add it to the >> > PATH. >> > >> > Is this a bug, or have I done something wrong?! >> >> What the installer adds to PATH is the Python36[-32] directory that >> has python.exe and the Scripts directory that has pip.exe. The >> recommended way to run Python is via the "python" command not "py". >> The py launcher is mainly for shell executing script files with >> shebang processing. That said people do use py -X[-Y[-32]] as a >> convenient way to run multiple versions of Python without modifying >> PATH. >> >> As to adding SystemRoot to PATH, it should be there already. This >> doesn't matter if the program lets CreateProcess search because it >> always searches system directories before PATH. But it matters in a >> common case; cmd.exe does its own search and only searches PATH (and >> also the current directory if the system is configured insecurely). > > Hmm, that seems to contradict what the docs say: `py` is recommended for > Windows users who want to run various versions (not just for executing > scripts).
"python" is the recommended way to run Python that's cross-platform. The last thing I'd want is to see tutorials and FAQs filled with caveats that Windows users should use py -X[.Y[-32]] instead of python. It can be assumed that the environment is configured correctly for the python command to run the desired version of the interpreter. The best way to do that is to develop using virtual environments. Steve Dower (Microsoft) and Nick Coghlan (Red Hat) have made suggestions for a new "python" launcher that can run multiple versions and would be available on all platforms. I've yet to see any specific discussion about this idea on python-ideas or python-dev -- at least not to the point that someone is willing to write a PEP and start coding. It's just a pipe dream for now. > SystemRoot is not in my PATH variable. Open the environment variables editor in the system properties window; double-click on "Path" in the system variables and insert the following at the beginning: %SystemRoot%\System32;%SystemRoot%;%SystemRoot%\System32\Wbem; These are present by default when Windows is installed -- except %SystemRoot% may already be expanded to C:\Windows, or wherever Windows is installed on the system. Someone or some program messed up if they're missing. -- https://mail.python.org/mailman/listinfo/python-list
