On Aug 13, 1:30 pm, Christian Heimes <[EMAIL PROTECTED]> wrote: > Trynamedtuplehttp://code.activestate.com/recipes/500261/ > > Anamedtupleimplementation is part of Python 2.6 and 3.0. For older > versions of Python use the recipe from activestate. > > Christian
This named tuple recipe is pretty cool... I think there may be a slight bug in the Python docs, though. The ActiveState page explains that it avoids the overhead of a per-instance __dict__ by using the __slots__ variable. However, according to the most-recent Python docs, __slots__ does *NOT* work with subclasses of list, str, or tuple. >From http://docs.python.org/ref/slots.html#l2h-222: # __slots__ do not work for classes derived from ``variable-length'' built-in types such as long, str and tuple. On the other hand, nametuple does appear to work as advertised. >>> Person=namedtuple.namedtuple('Person', ('name', 'age', 'height')) >>> p=Person('Bob', 24, 1.86) >>> p.name 'Bob' >>> p.shoe_size AttributeError: 'Person' object has no attribute 'shoe_size' >>> p.__dict__ AttributeError: 'Person' object has no attribute '__dict__' So is there a bug in the Python docs? Does __slots__ in fact work with subclasses of tuple? Dan -- http://mail.python.org/mailman/listinfo/python-list
