Python-URL! - weekly Python news and links (Oct 25)

Gabriel Genellina python-url at
Sun Oct 25 17:49:56 CET 2009

QOTW:  "It was intended to be understood, not copied." - Dave Angel comments
on a characteristic of didactic examples
    Altering the default character encoding (sys.setdefaultencoding) is never
    a  good idea:
    How come id() returns the same thing for different objects?
    Some iterators share state, while others don't - why?
    sum(list_of_strings) is explicitely forbidden - why?
    Neither __getattribute__ nor metaclasses can be used to implement
    __special__ methods:
    How to compute a running median efficiently:
    Several details on how str.split() works are not adequately documented:
    How to implement a set that uses a custom function to determine element
    membership (not the element's __eq__):
    Generators explained as simply as possible:
    Proposal to add slice notation [start:stop:step] to iterators/generators:
    An encoding problem involves an XML document, HTTP headers, and Google
    The `while True:` idiom makes the longest thread so far:
    "Homework" questions: what should be our reaction?
    Why is python so sad :( ?
    Guido's proposes to freeze language grammar and semantics for several
Everything Python-related you want is probably one or two clicks away in
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 enthusiasts":
    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.

    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 commentary.
    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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