Subclassing complex with computed arguments

[Dan Perl]

I need a clarification.  Does "sample" have to be an instance of complex or 
can it be a subclass of complex?  So can it be an instance of point as long 
as point is a subclass of complex?

If "sample" has to be an instance of complex and not of a subclass, I think 
you need to subclass point from complex and override the __new__() method to 
return an instance of complex and override __init__() to use all your 
arglist.  In that case you also need yet another method to actually create 
instances of point.

If "sample" can be an instance of a subclass of complex, I think you can 
just subclass point from complex and override only __init__().

There is more in the details I guess, but I would like to first see an 
answer to the above questions.

Dan

"Peter Olsen" <pcolsen at comcast.net> wrote in message 
news:a86143fb.0411251430.50665acf at posting.google.com...
>I want to define a class "point" as a subclass of complex.
>
> When I create an instance
>
> sample = point(<arglist>)
>
> I want "sample" to "be" a complex number, but with its real and
> imaginary parts computed in point()'s __init__ function with their
> values based on the arglist.  I want to compute with point instances
> as though they were native complex numbers, but I want to be able to
> define some new methods and over-ride some of complex's existing ones.
>
> This is probably very simple, but it hasn't been simple to me.
>
> Please feel free to flame me with RTFM as long as you also tell me
> where in TFM to R.
>
> If you respond, please send a copy directly to me.  I seldom have
> access to this group.  (My primary network isn't connected to the
> internet.)
>
> Peter
> pcolsen-at-comcast.net