Michael Hobbs wrote:
Simon Wittber <[EMAIL PROTECTED]> wrote:
I've noticed that a few ASPN cookbook recipes, which are recent additions, use classic classes.
I've also noticed classic classes are used in many places in the standard library.
I've been using new-style classes since Python 2.2, and am suprised people are still using the classic classes.
Is there a legitimate use for classic classes that I am not aware of? Is there a project to specifically migrate standard library classes to new-style classes?
I'm guessing that the biggest contributor to the continued prevalence of classic classes is the official Python Tutorial: http://docs.python.org/tut/node11.html#SECTION0011300000000000000000
I came into Python around the 2.2 timeframe and used the tutorial as my starting point. I had often read people referring to "classic classes" but assumed that it was some old pre-2.2 thing that I need not worry about. For the longest time, I had assumed that I was using new style classes because I created them exactly as prescribed in the 2.2 tutorial (which still hasn't changed for 2.3 or 2.4).
Now, classic classes are my habit and I see no compelling reason to put in the effort to change my habits.
Since the only effort is the addition of
__meta class__ = type
at the head of your modules you could probably automate this without breaking too much code.
regards Steve -- Steve Holden http://www.holdenweb.com/ Python Web Programming http://pydish.holdenweb.com/ Holden Web LLC +1 703 861 4237 +1 800 494 3119 -- http://mail.python.org/mailman/listinfo/python-list
