En Tue, 02 Jun 2009 19:02:47 -0300, Brian Allen Vanderburg II
<brianvanderbu...@aim.com> escribió:
What is the best way to copy an object that has multiple inheritance
with the copy module. Particularly, some of the instances in the
hierarchy
("...some of the classes in...", I presume?)
use the __copy__ method to create a copy (because even for shallow
copies they need some information updated a little differently), so how
can I make sure all the information is copied as it is supposed to be
even for the base classes that have special requirements.
If you don't control all the clases involved, there is little hope for a
method like __copy__ to work at all... All classes must be written with
cooperation in mind, using super() the "right" way. See "Python's Super
Considered Harmful" [1] and "Things to Know About Python Super" [2][3][4]
That said, and since multiple inheritance is the heart of the problem,
maybe you can redesign your solution *without* using MI? Perhaps using
delegation instead?
[1] http://fuhm.net/super-harmful/
[2] http://www.artima.com/weblogs/viewpost.jsp?thread=236275
[3] http://www.artima.com/weblogs/viewpost.jsp?thread=236278
[4] http://www.artima.com/weblogs/viewpost.jsp?thread=237121
--
Gabriel Genellina
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