Rich comparison in derived class, but not in base (boost.python)

[Alex Martelli]

"Pearu Peterson" <pearu at cens.ioc.ee> wrote in message
news:Pine.LNX.4.21.0103211112040.1131-100000 at kev.ioc.ee...
    [snip]
> I checked also the following approach:
> class expr:
>     def __init__(self,*args):
>         self.e = ex(*args)
>     def __cmp__(self,other):
>         raise NotImplementedError,"expr.__cmp__() should not be called"
>     def __lt__(self, other):
>         return relational(self.e, other, '<')
>     # also other richcomp methods are defined but not shown here
>
> that works fine but then I would have to re-define also all `ex' methods
> in `expr' --- there are more than 30 of them, so I would not want to do

As a temporary workaround, just delegate via __getattr__:

      def __getattr__(self, attr):
        return getattr(self.e, attr)


Alex