Python-URL! - weekly Python news and links (Apr 21)

Cameron Laird claird.netnews at
Thu Apr 22 01:09:43 CEST 2010

QOTW:  "There's no RightAnswer(tm), just our best guess as to what is
the most
useful behavior for the most number of people." - Raymond Hettinger

   First beta version of Python 2.7 is available:

   Why still a 2.7 release, when 3.1 is already out?

   Deciding when to pass around a parameter, and when to keep it as an
   instance attribute:

   A class is more than just a container for functions and attributes:

   Lie Ryan tries to explain the various escaping levels of a regular
   expression string:

   Peter Otten shows how to make string.Template resolve dotted.names
   nested dictionaries:

   Simple string operations, regular expressions, and a full blown
   the right tools for different jobs

   The list comprehension loop variable, nested scopes, and common
   applied to programming languages:

   Performance of list vs. set equality operations -- later:
   the Open/Closed principle, and why overriding __special__ methods
   not affect certain built-in type operations:

   __del__ methods are not the same as C++ destructors; they might not
   be called:

   Abstract Base Classes affect the way issubclass() works -- it's not
   based only on the chain of MRO anymore:

   wxPython and a bad example of 'property' usage:

   Keeping client expectations realistic and avoiding scope creep:

Everything Python-related you want is probably one or two clicks away
these pages:'s Python Language Website is the traditional
   center of Pythonia
   Notice especially the master FAQ

   PythonWare complements the digest you're reading with the
   marvelous daily python url

   Just beginning with Python?  This page is a great place to start:

   The Python Papers aims to publish "the efforts of Python
   The Python Magazine is a technical monthly devoted to Python:

   Readers have recommended the "Planet" site:

   comp.lang.python.announce announces new Python software.  Be
   sure to scan this newsgroup weekly.

   Python411 indexes "podcasts ... to help people learn Python ..."
   Updates appear more-than-weekly:

   The Python Package Index catalogues packages.

   Much of Python's real work takes place on Special-Interest Group
   mailing lists

   Python Success Stories--from air-traffic control to on-line
   match-making--can inspire you or decision-makers to whom you're
   subject with a vision of what the language makes practical.

   The Python Software Foundation (PSF) has replaced the Python
   Consortium as an independent nexus of activity.  It has official
   responsibility for Python's development and maintenance.
   Among the ways you can support PSF is with a donation.

   The Summary of Python Tracker Issues is an automatically generated
   report summarizing new bugs, closed ones, and patch submissions.

   nullege is an interesting search Web application, with the
   to distinguish between Python code and comments.  It provides what
   appear to be relevant results, and demands neither Java nor CSS be

   Although unmaintained since 2002, the Cetus collection of Python
   hyperlinks retains a few gems.

   Python FAQTS

   The Cookbook is a collaborative effort to capture useful and
   interesting recipes.

   Many Python conferences around the world are in preparation.
   Watch this space for links to them.

   Among several Python-oriented RSS/RDF feeds available, see:
   For more, see:
   The old Python "To-Do List" now lives principally in a
   SourceForge reincarnation. presents an intriguing approach to reference
   It already aggregates quite a bit of Python intelligence.

   Enjoy the *Python Magazine*.

   *Py: the Journal of the Python Language*

   Dr.Dobb's Portal is another source of Python news and articles:
   and Python articles regularly appear at IBM DeveloperWorks:

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