[Catalog-sig] implementing PEP 262 as academic work

Maurice Ling mauriceling at acm.org
Thu May 5 14:57:27 CEST 2005

Thanks for your pointers, Martin.

 From your point of view, I do agree that you do not need more 
intervention from disutils. In fact, if the package maintainers so 
desire, you do not even need disutils at all. So the question here is, 
is PEP 262 really needed at all? I can see that Martin or anyone using 
Debian may not need it. However, at where I am (MacOSX with Fink), I 
need it.

What is the current plans now?


>Maurice Ling wrote:
>>Given that (1) there can be multiple versions of Python installed in a
>>system, (2) each version maintains their own site-packages directory and
>>(3) if C modules are installed, they are not compatible with other
>>versions of Python... Imagine a system administrator who had installed
>>50 libraries and their dependencies in site-package of Python 2.3 and
>>now has to do it for Python 2.4, can we make his life better?
>I'd like to point out that this is a task that the "native" package
>format can solve. For example, in Debian, when I use Debian packages
>to install the 50 libraries, the current Debian Python policy manages
>to update all the libraries from Python 2.3 to Python 2.4, when
>the "official" Debian Python version becomes 2.4.
>This is achieved by providing, for a library "foo", several packages:
>python-foo, python2.2-foo, python2.3-foo, python2.4-foo. As a user,
>I install python-foo, which currently depends on python2.3-foo. When
>/usr/bin/python becomes 2.4, a new version of python-foo will be
>released which depends on python2.4-foo. Just by updating all packages
>I have installed, it automatically installs python2.4-foo as well.
>Of course, if I don't want to wait for Debian to make /usr/bin/python
>Python 2.4, I easily upgrade all libraries myself:
>dpkg --get-selections|grep python2.3-|sed s/2.3/2.4/|dpkg --set-selections
>will arrange to select all 2.4 libraries for which I have 2.3
>versions installed.
>So on Debian, I don't need any further support from distutils.

Maurice Han Tong LING, BSc(Hons)(Biochem), AdvDipComp, CPT, SSN, FIFA, 
Doctor of Philosophy (Science) Candidate, The University of Melbourne
mobile: +61 4 22781753, +65 96669233
mailing address: Department of Zoology, The University of Melbourne
		 Royal Parade, Parkville, Victoria 3010, Australia
residence: 9/41 Dover Street, Flemington, Victoria 3031, Australia
resume: http://maurice.vodien.com/maurice_resume.pdf
www: http://www.geocities.com/beldin79/

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