http://www.openplans.org/projects/topp-engineering/blog Just another weblog Tue, 18 Nov 2008 22:48:27 +0000 http://backend.userland.com/rss092 en I did a bit more work on the Python optimizer last week. This time, the problem was tuple assignment. Consider the code: a, (b, c) = d, e = 1, (2, 3) This would get translated to: LOAD_CONST 1 LOAD_CONST (2, 3) BUILD_TUPLE 2 # builds the tuple (1, (2, 3) DUP_TOP ... http://www.openplans.org/projects/topp-engineering/blog/2008/11/18/18/ The zcml tag doesn't actually create a permission.  (Or at least, that's the case in Five. Dunno about "pure" zope 3.)   The permission actually springs to life when you protect something with it. This came up because I had an error similar to the one in  this thread, ... http://www.openplans.org/projects/topp-engineering/blog/2008/11/13/zope-2-five-permissions-gotcha/ For all the web designers out there in the TOPPosphere... From a designer's POV, the most important files are templates, CSS, and javascript.  They are the three pillars of web design.  The sun rises and sets with them.  They are best friends.  So, ideally, they should be as close ... http://www.openplans.org/projects/topp-engineering/blog/2008/11/06/beautiful-application-file-layouts/ ­I spent some time over the past few weeks looking into the internals of the Python compiler and bytecode interpreter. First, some general impressions. The code is very clean C code. It actually uses Python objects internally for things that are annoying to safely represent in C, such as strings, vectors ... http://www.openplans.org/projects/topp-engineering/blog/2008/11/03/optimizing-python/ I'm not a big fan of the Zope 3 Component Architecture.  A couple packages came out recently that made it clearer to me why. The packages in question are repoze.bfg.httprequest  and r­epoze.bfg.restrequest­.  restrequest is easier to understand because it is more concrete: basically it adds marker interfaces to your request ... http://www.openplans.org/projects/topp-engineering/blog/2008/10/20/what-bothers-me-about-the-component-architecture/ We've been using Xinha at TOPP for a while, and with two of us now core developers, I thought it would be worthwhile to try to hash out what we're ... http://www.openplans.org/projects/topp-engineering/blog/2008/10/11/xinha-at-topp/ At ploneconf, Kapil gave an interesting talk on a project called contentmirror (http://code.google.com/p/contentmirror/). It allows you to serialize your plone content into a relational database, in a pretty transparent way. It does this by hooking into the zope3 lifecycle events, and pushes the data out to the database synchronously ... http://www.openplans.org/projects/topp-engineering/blog/2008/10/10/contentmirror/ The other day I saw that Rollie had tagged http://www.kottke.org/08/09/tech-conference-panels-suck for inclusion in the PlanetDev feed. I found that seeing it there and reading it really upset me.  Jackie saw me get upset and helped me realize that there were actually some broadly useful points to share about why it did ... http://www.openplans.org/projects/topp-engineering/blog/2008/09/30/respect-and-conversation-on-planetdev/ Note: since this was written I have renamed pyinstall to pip. ­Have you ever been frustrated by easy_install? Yeah, me neither. But I have heard whispers of discontent. So I'm introducing a new tool for the installation of Python packages: pyinstall. pyinstall is mostly easy_install compatible. That means it finds distributions ... http://www.openplans.org/projects/topp-engineering/blog/2008/09/24/pyinstall-a-new-hope/ I'm about to head off on vacation, so this seemed like as good a time as any to kick this out of my drafts folder...  As some of you know, I've been doing the brainpower project as a Django admin application. The reasons for this decision were: Django ... http://www.openplans.org/projects/topp-engineering/blog/2008/08/12/my-first-django-app/