[Biopython-dev] [Biopython] Subclassing Seq and SeqRecord

[Jose Blanca]

> The point is while your proposed change will make some tasks
> easier (e.g. writing an extended Seq subclass that adds a new
> method or changes an existing method), it will make other tasks
> much harder (e.g. the DBSeq class).

That's a fair point. You're right in either case some methods would have to be 
reimplemented.
I don't know if the current situation is the most convenient because the 
actual implementations have a mixed behaviour. Some methods like the Seq's 
__add__ use __class__ and some others like __getitem__ use Seq(). Is there a 
reason for that?
Regards,

-- 
Jose M. Blanca Postigo
Instituto Universitario de Conservacion y
Mejora de la Agrodiversidad Valenciana (COMAV)
Universidad Politecnica de Valencia (UPV)
Edificio CPI (Ciudad Politecnica de la Innovacion), 8E
46022 Valencia (SPAIN)
Tlf.:+34-96-3877000 (ext 88473)