The issue is that until Ubuntu 9.04, the standard place for 3rd-party
modules such as Visual was /usr/lib/python2.6/site-packages if you were
using /usr/bin/python2.6, or else /usr/local/lib/python2.6/site-packages
if you were using /usr/local/bin/python2.6.
As a result, the "autoconfigure" script for VPython places the Visual
module in one of these site-packages locations, depending on whether in
your configure statement you say "--prefix=/usr" or
"--prefix=/usr/local" (the latter being the default).
However, starting with Ubuntu 9.04, 3rd-party packages are apparently
supposed to be somewhere else (dist-packages), and there seems to be
some confusion about what is the new convention. More seriously,
site-packages is apparently no longer on Python's module search path.
That is, Python doesn't look in site-packages to find modules. This is a
problem because at present the autoconfigure procedure will install
Visual in the specified site-packages, not dist-packages.
A possible scheme to deal with this is outlined in the comments you
quote. The configure statement
PYTHON=/usr/bin/python ../vpython-core2/configure --prefix=/usr/local/lib
says "I'm using the python found in /usr/bin (which in Ubuntu 9.04 is
equivalent to /usr/bin/python2.6), but I want the Visual module to be
put in /usr/local/lib/site-packages".
And then you need to copy vpython-core2/src/gtk2/site-packages.pth to
/usr/lib/python2.6/dist-packages to put
/usr/local/lib/python2.6/site-packages on the Python search path.
The contents of vpython-core2/src/gtk2/site-packages.pth is simply
/usr/local/lib/python2.6/site-packages.
Bruce Sherwood
Matteo Malosio wrote:
> I'm trying to install VPython5 on Ubuntu but I've some doubt about the
> "configure" process.
> I can't understand what is reported in the Install file:
>
> " There have been significant changes in where 3rd-party software is
> stored on
> Ubuntu 9.04. You probably want to use /usr/bin/python2.6 but store
> the Visual
> module in /usr/local/lib/python2.6/site-packages. To configure, do
> this in a
> folder parallel to vpython-core2:
>
> PYTHON=/usr/bin/python ../vpython-core2/configure
> --prefix=/usr/local/lib
>
> You will also need to copy vpython-core2/src/gtk2/site-packages.pth to
> /usr/lib/python2.6/dist-packages to put
> /usr/local/lib/python2.6/site-packages
> on the Python search path."
>
>
> Thank you!
>
> Matteo
>
>
>
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