Subclassing array
Sion Arrowsmith
siona at chiark.greenend.org.uk
Thu May 4 11:27:42 EDT 2006
Alex Martelli <aleaxit at yahoo.com> wrote:
>TG <girodt at gmail.com> wrote:
>> When I call Vector.__init__() in Stimulus, doesn't it also call __new__
>> ? I don't understand the detail of callings to __new__ and __init__ in
>> python inheritance ...
>Calling a (new-style) class does __new__ first, THEN calls the class's
>__init__ on the resulting instance -- and the arguments you're passing
>when calling the class go to both __new__ and __init__.
... so you might want something like:
class Vector(array):
def __new__(cls,*args):
return super(Vector,cls).__new__(cls,'f')
--
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
___ | "Frankly I have no feelings towards penguins one way or the other"
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