Re: Linux installation

Thanks much for the detailed information, though I don't understand
why this would function differently within and without the
autoconfigure environment.

As for site-packages being on the Python 3.1 search path, I see that I
had forgotten that I had put a .pth file in
/usr/local/python3.1/dist-packages to specify site-packages. Sorry for
the confusion (and sorry that Ubuntu has caused a lot of people grief
by not including site-packages, as judged from chatter on the web). An
amusing aside:

I chose the menu option System > About Ubuntu and got the following
remarkable message from the future:

You are using Ubuntu 11.04
                - the Natty Narwhal - released in April 2011 and
supported until October 2012.

However, I believe I'm using 10.10.
	
Bruce Sherwood

On Mon, Dec 20, 2010 at 10:06 PM, Jacob Schmidt
<[email protected]> wrote:
> Bruce,
>
> Ubuntu Lucid Lynx 10.04
> =======================
> Python 2.6.5 installed by default
> Python 3.1.2 installed from repositories
>
>
> I find this code in /usr/lib/python3.1/distutils/sysconfig.py
> under the function get_python_lib
>
>
>
>    if os.name == "posix":
>        libpython = os.path.join(prefix,
>                                 "lib", "python" + get_python_version())
>        if standard_lib:
>            return libpython
>        elif is_default_prefix and 'PYTHONUSERBASE' not in os.environ
> and 'real_prefix' not in sys.__dict__:
>            return os.path.join(libpython, "dist-packages")
>        else:
>            return os.path.join(libpython, "site-packages")
>
>
>
> It appears to suggest that the choice is made due to the elif line,
> which appears to automatically choose 'site-packages' if you send in a
> particular prefix.
>
> Also, I would like to inform you that in my installation (Python 3.1.2),
> site-packages is not on the search path, and the folder does not even
> exist!
>
> P.S. - Same result as above for my Python 2.6.5 installation
>
> HTH,
> Jacob Schmidt
>
> On Mon, 2010-12-20 at 21:35 -0700, Bruce Sherwood wrote:
>> I wonder whether someone on the list can help me with a puzzle having
>> to do with installing on Linux.
>>
>> In acinclude.m4 is the following fragment which attempts to identify
>> where to install modules such as Visual:
>>
>> [am_cv_python_pythondir=`$PYTHON -c "from distutils import sysconfig;
>> print(sysconfig.get_python_lib(0,0,prefix='$PYTHON_PREFIX').replace('\\\\\','/'))"
>> 2>/dev/null ||
>> echo "$PYTHON_PREFIX/lib/python$PYTHON_VERSION/dist-packages"`]
>>
>> When autogen.sh and configure are run before doing a make to build
>> Visual, this fragment generates a reference to site-packages, which is
>> unfortunate, because on Ubuntu with Python 2.x site-packages is not
>> normally on the module search path.
>>
>> If on the other hand I execute the following I get a reference to
>> dist-packages, as expected and desired:
>>
>> from distutils import sysconfig
>> print(sysconfig.get_python_lib(0,0,prefix='$PYTHON_PREFIX')
>>
>> I can't understand why I'm getting a reference to site-packages in the
>> autoconfigure machinery. I'm reluctant to hand-code "dist-packages"
>> because for all I know other Linux distributions use site-packages and
>> have site-packages on the module search path. (As an aside, I'm
>> annoyed that Ubuntu has left site-packages off the search path, though
>> I notice that it seems to be back on the search path for Python 3.)
>>
>> Bruce Sherwood
>>
>> ------------------------------------------------------------------------------
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>
>
>
>
>

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