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On 25 Oct 2009, at 23:30, aharrisreid wrote:
>
> I am very much new to Python, and one of my first projects is a simple
> data-based website. However, looking to the future, I am
> starting with Python 3.1 (I can hear many of you shouting "don't -
> start with 2.6"), so I need to know - is Pylons compatible with 3.1
> yet. If not, are plans in the pipeline?
Apart from the WSGI hiatus described by Mike, the Pylons code itself
is compatible with Python 3.1, however none of the libraries on which
Pylons depends have been yet been ported to run under 3.1. It's not so
much a case of an active "plans in the pipeline" but rather a passive
wait for the 3rd party library authors to implement the ports:
Ports required for Pylons 0.9.7 dependencies:
simplejson
decorator
nose
Routes
WebHelpers
Beaker
Mako
WebError
WebOb
WebTest
Paste
PasteDeploy
PasteScript
FormEncode
Tempita
Coincidentally, I've been pushing 3.1 around this weekend. I
bootstrapped myself up with a 3.1 environment (virtualenv3, setuptools
for 3.1, easy_install-3.1, nosetests3) and ran the standard 2to3-3.1
preprocessor on the dependency libs. Heroically ignoring varying
degrees of brittleness and failing, erroring tests I was able to
compile and install them all and did eventually manage to get Paster/
Pylons to run and serve the welcome screen.
According to Mike Bayer, SQLAlchemy 0.6 is 3.1 compatible, it uses a
customized 2to3 preprocessor but it isn't quite an out-of-the-box
easy_install and the sqlite tests are failing (on my set-up at least).
I'm not sure why the general migration to 3.1 is going so slowly given
that many people seem very keen to get max speed.
3.1 is quicker than 2.6.1 for me. I'm seeing 1.50 usec/pass from
Python 3.1 and 2.21 usec/pass from Python 2.6.1 when this trivial
example is executed from within a TextMate buffer on my intel PowerBook:
import timeit
s = """\
try:
str.__bool__
except AttributeError:
pass
"""
t = timeit.Timer(stmt=s)
print("%.2f usec/pass" %
(1000000 * t.timeit(number=100000)/100000))
1.50 usec/pass vs 2.21 usec/pass is worth having IMO.
Cheers,
Graham
http://www.linkedin.com/in/ghiggins
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