string methods of a str subclass

[Daniel Nogradi]

> > Why is the strip( ) method returning something that is not a mystr
> > instance? I would expect all methods operating on a string instance
> > and returning another string instance to correctly operate on a mystr
> > instance and return a mystr instance.
>
> Why would you expect that?
> Would you expect the __str__ and__repr__ methods also to return a mystr
> instance? If not those, then which other ones might also be excluded?
> Is x.encode('zip') still a mystr instance or an encoded byte-string?

Okay, good point, thanks.

> > How would I achieve something
> > like this without manually copying all string returning methods from
> > str and stuffing the result to mystr( ) before returning?
>
> You don't without wrapping all the affected methods. It doesn't need to
> involve manual copying though: you have a programming language available so
> just write a list of method names and then some code to wrap them
> automatically.

Yes, this is in fact what I am doing, using __getattr__ and such. Thanks again.