[Python-Dev] Re: copy, len and the like as 'object' methods?
Guido van Rossum
guido@python.org
Thu, 23 Aug 2001 09:24:52 -0400
> A strange thought, but with the advent of type/class unification and the
> 'object' base class, is it possible to inject new methods into the 'object'
> type at runtime, allowing:
>
> def len(self):
> return self.__length__()
> object.len = len
No you can't. Built-in types are immutable. Two reasons: they're
shared between multiple interpreters, and it would encourage modules
to modify a built-in type to suit their own needs, which it might
break other modules.
--Guido van Rossum (home page: http://www.python.org/~guido/)