Subject: Optional C extensions and setuptools - msg#00051

Previous Message by Date: click to view message preview

Re: pakage index __getitem__

At 07:01 PM 3/17/2007 -0400, Jim Fulton wrote: >I want to get a list of all of the distributions I can find that >satisfy a requirement. I've found the following works: > > index.obtain(requirement) > dists = [d for d in index[requirement.project_name] if d in >requirement] > >where index is a setuptools.package_index.PackageIndex. > >Is there a better way? There are other ways, but the above is the simplest and most direct way, given your use case. Normally, performing a resolve() or require() on a working set will end up invoking obtain() indirectly, if a requirement can't otherwise be met -- this allows network access to be lazy, so it's not done unless it's really needed. > The obtain call seems to be necessary to >initialize the index for the given project. Yes - Environment normally calls 'obtain()' in response to a 'best_match()' operation, which is in turn called by a WorkingSet's 'resolve()' method. The idea is that you can subclass Environment (in this case, to create a PackageIndex) and override 'obtain()' to find packages in locations that are not part of the working set used to create the Environment. _______________________________________________ Distutils-SIG maillist - Distutils-SIG@xxxxxxxxxx http://mail.python.org/mailman/listinfo/distutils-sig

Next Message by Date: click to view message preview

Re: Optional C extensions and setuptools

On 3/18/07, Bob Ippolito <bob@xxxxxxxxxx> wrote: > I've just added a small optional C extension to simplejson to speed up > decoding, but I have a feeling that it's going to cause problems for > Windows users. > > Right now it's specified as setuptools Feature the same way that > PyProtocols' speedups module is implemented. > > Is there something I can do in the setup.py to fail gracefully and > install anyways if it can't compile the extension? In some way that's > compatible with easy_install? Twisted does this: it subclasses build_ext and overrides build_extensions to check if there's a C compiler before upcalling. -- Christopher Armstrong International Man of Twistery http://radix.twistedmatrix.com/ http://twistedmatrix.com/ http://canonical.com/ _______________________________________________ Distutils-SIG maillist - Distutils-SIG@xxxxxxxxxx http://mail.python.org/mailman/listinfo/distutils-sig

Previous Message by Thread: click to view message preview

pakage index __getitem__

I want to get a list of all of the distributions I can find that satisfy a requirement. I've found the following works: index.obtain(requirement) dists = [d for d in index[requirement.project_name] if d in requirement] where index is a setuptools.package_index.PackageIndex. Is there a better way? The obtain call seems to be necessary to initialize the index for the given project. Jim -- Jim Fulton mailto:jim@xxxxxxxx Python Powered! CTO (540) 361-1714 http://www.python.org Zope Corporation http://www.zope.com http://www.zope.org _______________________________________________ Distutils-SIG maillist - Distutils-SIG@xxxxxxxxxx http://mail.python.org/mailman/listinfo/distutils-sig

Next Message by Thread: click to view message preview

Re: Optional C extensions and setuptools

On 3/18/07, Bob Ippolito <bob@xxxxxxxxxx> wrote: > I've just added a small optional C extension to simplejson to speed up > decoding, but I have a feeling that it's going to cause problems for > Windows users. > > Right now it's specified as setuptools Feature the same way that > PyProtocols' speedups module is implemented. > > Is there something I can do in the setup.py to fail gracefully and > install anyways if it can't compile the extension? In some way that's > compatible with easy_install? Twisted does this: it subclasses build_ext and overrides build_extensions to check if there's a C compiler before upcalling. -- Christopher Armstrong International Man of Twistery http://radix.twistedmatrix.com/ http://twistedmatrix.com/ http://canonical.com/ _______________________________________________ Distutils-SIG maillist - Distutils-SIG@xxxxxxxxxx http://mail.python.org/mailman/listinfo/distutils-sig