1,155 posts tagged “python”
The Python programming language.
2008
Django Unit Tests and Transactions. If you’re using a transactional database engine (MySQL with InnoDB, Postgres or SQLite) you can speed things up by running each of your unit tests inside a transaction and rolling back in tearDown().
OSM routing, A*, cycle-filtered, python (via) A python library for finding routes using OpenStreetMap data.
Running C and Python Code on The Web. Adobe are working on a toolchain to compile C code to target the Tamarin VM in Flash. This will allow existing C code (from CPython to Quake) to execute in a safe sandbox in the browser.
Whitespace Sensitivity. Amusingly, Ruby is actually far more sensitive about whitespace than Python is.
Graphite. Real-time graphing package for server monitoring, similar to RRDTool. Created by the team at Orbitz, using Django and ExtJS for the frontend and Cairo to generate the graphs.
How-to: Full-text search in Google App Engine. Use search.SearchableModel instead of db.Model—it’s pretty rough at the moment which is probably why it’s still undocumented.
CookBookNewFormsFieldOrdering. Handy tip—change the order of fields in a Django newforms instance by over-riding form.fields.keyOrder (since fields is a SortedDict).
Django snippets: Command to dump data as a python script. Extremely useful—dumps the data for an application as an executable Python script which will re-import it in to another database without any risk of colliding with existing IDs, sorting out foreign keys along the way.
The basics of creating a tumblelog with Django (via) Ryan Berg suggests having a StreamItem model that links uses a GenericForeignKey to link to other content types, then using signals to cause a StreamItem to be created for every other model type. I should switch to doing that on this blog: at the moment I have to query three separate tables to build the tumblelog part which results in messy code for ordering and pagination.
Tailor. “Tailor is a tool to migrate or replicate changesets between ArX, Bazaar, Bazaar-NG, CVS, Codeville, Darcs, Git, Mercurial, Monotone, Subversion and Tla repositories.”—written in Python.
jsontime. Nat and I threw this together this morning—it runs on Google App Engine and exposes Python’s pytz timezone library over JSONP.
PortingDjangoTo3k. Martin von Loewis has started assembling a patch. His write-up illustrates some key differences between Python 2.X and Python 3—it looks like Django’s unicode handling is going to require the most work.
Reddit release their codebase. Under the same Common Public Attribution License used by Facebook for their recent source release.
New foundation for Django. Django now has its own nonprofit software foundation (courtesy of a bunch of tough paperwork by Jacob Kaplan-Moss), and fittingly the Lawrence-Journal World get the exclusive.
PEP 372—Adding an ordered dictionary to collections. Yes please!
Spicing Up Embedded JavaScript. John Resig collects the various ways in which a JavaScript interpreter can be hosted by Python, PHP, Perl, Ruby and Java. There are full JS implementations in PHP, Perl and Java; Ruby and Python both have modules that use an embedded SpiderMonkey.
DebugFooter middleware with Pygments sql syntax highlighting. Andreas Marr has enhanced my Django DebugFooter middleware with proper syntax highlighting for the logged SQL.
Censoring the Internet at Paraguay. The state owned telecommunication company DNS hijacked the opposition party’s domain to point at a porn site during the election back in April. Maybe we don’t want a django.py vanity domain after all...
RFC: Django 1.0 roadmap and timeline. Jacob’s proposed target is “early September” for the final 1.0 release.
Shortcutting render_to_response. I tend to use a simple wrapper function, but the other options described here are worth exploring. This is why I’m so keen on Django’s “take a request object, return a response object” philosophy—it makes it trivial to extend the framework in the direction you want.
Python + Hadoop = Flying Circus Elephant. Last.fm have released Dumbo, a Python module that lets you easily write Hadoop map/reduce tasks using Python and generators.
modswgi: Debugging Techniques. mod_wsgi is excellent software, and the documentation is equally superb. I used these instructions recently to run the Python debugger inside a running instance of Apache, which helped my track down some import errors that weren’t occurring with Django’s development server.
AOP aspect of JavaScript with Dojo. Fantastic post—concisely explains Aspect Oriented Programming, then shows how Dojo’s dojox.lang.aspect brings AOP to JavaScript, including some really useful built-in aspects for logging, profiling and more. Aspects are like Python decorators on steroids.
Using Git as a versioned data store in Python. gitshelve supports the same interface as Python’s built-in shelve module but stores things to a versioned Git repository instead of just a pickled dictionary. I’ve been casually wondering what a Git-powered CMS would look like.
Python with a modular IDE (Vim). Great tips—I’d use these if I wasn’t still scarred from the time vim encrypted my file instead of saving it because I had caps lock on by mistake.
Byteflow Blog Engine. This looks like the most full-featured of the Django blog engines by a pretty big margin, including OpenID client and server support. A product of the growing Russian/Ukrainian Django community.
What amazes me is how close Ruby 1.9 bytecode and Python 2.5 bytecode are. Some things translate almost directly. [...] And, really, if that's true (and I vouch that it is truly, truly true,) then how are Python and Ruby still on separate runtimes?
Sneaking Ruby Through Google App Engine (and Other Strictly Python Places). In a characteristic stroke of genius, _why makes a solid initial attempt at compiling Ruby 1.9 source to Python 2.5 bytecode.
Django Users Group London meetup, 19th of May. The inaugural meeting of DJUGL will be on the 19th of May at the Capital Radio building in Leicester Square, sponsored by GCap Media. Three presentations starting at 7pm (I’ll be giving one of them), then on to the pub. Sign up on EventWax; there are only 70 places.
jQuery style chaining with the Django ORM
Django’s ORM is, in my opinion, the unsung gem of the framework. For the subset of SQL that’s used in most web applications it’s very hard to beat. It’s a beautiful piece of API design, and I tip my hat to the people who designed and built it.
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