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Re: Deciding inheritance at instantiation?

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On 8/3/2012 4:48 PM, Tobiah wrote:
> I have a bunch of classes from another library (the html helpers
> from web2py).  There are certain methods that I'd like to add to
> every one of them.  So I'd like to put those methods in a class,
> and pass the parent at the time of instantiation.  Web2py has
> a FORM class for instance.  I'd like to go:
>
>      my_element = html_factory(FORM)
>
> Then my_element would be an instance of my class, and also
> a child of FORM.
>
> I started messing with decorators, but it became difficult
> for me to visualise how to do this.

Use type(name, bases, content) for dynamic class creation.

-- 
Terry Jan Reedy

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Thread

Deciding inheritance at instantiation? Tobiah <toby@tobiah.org> - 2012-08-03 13:48 -0700
  Re: Deciding inheritance at instantiation? Terry Reedy <tjreedy@udel.edu> - 2012-08-03 17:55 -0400
    Re: Deciding inheritance at instantiation? Tobiah <toby@tobiah.org> - 2012-08-06 10:42 -0700
  Re: Deciding inheritance at instantiation? Nobody <nobody@nowhere.com> - 2012-08-04 00:52 +0100
  Re: Deciding inheritance at instantiation? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-04 01:14 +0000
  Re: Deciding inheritance at instantiation? "Steven W. Orr" <steveo@syslang.net> - 2012-08-03 23:14 -0400
  Re: Deciding inheritance at instantiation? alex23 <wuwei23@gmail.com> - 2012-08-06 19:53 -0700
    Re: Deciding inheritance at instantiation? Tobiah <toby@tobiah.org> - 2012-08-07 10:52 -0700

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