[Python-Dev] Python install layout and the PATH on win32 (original) (raw)

Paul Moore p.f.moore at gmail.com
Sat Mar 17 15:50:24 CET 2012

On 17 March 2012 14:07, Serhiy Storchaka <storchaka at gmail.com> wrote:

17.03.12 13:57, Paul Moore написав(ла):

As there is no way of knowing the Python version without running Python, this is too slow to be practical. Cold start: $ time python3 --version Python 3.1.2 real    0m0.073s user    0m0.004s sys     0m0.004s Hot start: $ time python3 --version Python 3.1.2 real    0m0.007s user    0m0.004s sys     0m0.004s

Blame it on Windows or my overloaded PC if you must :-) but I get perceptible delays on a cold start at times. Plus, I'd probably need to do this in code that enumerates all installed Pythons and virtualenvs - that could be 10 installations. I've never tried it in anger, so I could be worrying over nothing, but to an extent that's my point - I don't need to know the version unless I have to have version-specific code to define the layout.

And if I were starting Python up, I'd probably be better just importing sys and sysconfig, and using sys.executable and sysconfig.get_path('scripts'). And there's the chicken-and-egg problem

Meh. None of this is a real issue. It's just some extra messy coding. But Van's point is that this proposal gives him less hard coding. Beyond pointing out that it gives me more, I don't have much to add.

Paul.

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