problem deriving form type long

[Gabriel Genellina]

En Mon, 21 Jan 2008 18:33:10 -0200, Frederic Rentsch  
<anthra.norell at vtxmail.ch> escribi�:

> Hi, here's something that puzzles me:
>
>  >>> class Fix_Point (long):
>         def __init__ (self, l):
>            long.__init__ (self, l * 0x10000):
>
>  >>> fp = Fix_Point (99)
>  >>> fp
>     99

You have to override __new__, not __init__. Immutable types like numbers  
and tuples don't use __init__.
See http://docs.python.org/ref/customization.html

> (P.S. I am not currently a subscriber. I was and had to bail out when I
> couldn't handle the volume anymore. To subscribe just to post one
> question doesn't seem practical at all. So, I don't even know if this
> message goes through. In case it does, I would appreciate a CC directly
> to my address, as I don't think I can receive the list. Thanks a  
> million.)

You can read this thru the Google Groups interfase:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/ade1fdc42c5380b8/
or using Gmane:
http://thread.gmane.org/gmane.comp.python.general/555822

-- 
Gabriel Genellina