On 04/04/13 03:36, Guido van Rossum wrote:
Consider a subclass of int() that overrides __repr__() and __str__() to print something fancy (maybe it defaults to hex; maybe it's an enum :-). I want to be able to say repr(int(x)) and get the standard decimal representation. Same with strings. If int() or str() were allowed to return a subclass instance, this wouldn't work, and I'd have to resort to draconian measures.
int and str currently are allowed to return subclass instances.
(Betcha the first few solutions you come up with don't even work. :-)
Well, I'm always game to learn something. Challenge accepted. # Force a string subclass s to a built-in string. ''.join(s) # Force an int subclass n to a built-in int. (0).__add__(n) # And similarly for float subclass. 0.0.__add__(x) -- Steven _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
