[Python-3000] Composable abstract base class?
python at zesty.ca
Sun May 27 10:18:49 CEST 2007
On Sun, 27 May 2007, Ryan Freckleton wrote:
> I've been following the python-dev and python 3000 lists for over a
> year, but this is my first posting.
> I think I've found additional abstract base class to add to PEP 3119.
> An ABC for composable data (e.g. list, tuple, set, and perhaps dict)
> to inherit from. An composable object can contain instances of other
> composable objects. In other words, a composable object can be used as
> the outer container in a nested data structure.
> def recurse(sequence):
> if isinstance(sequence, Composoble):
> for child in sequence:
> print sequence
I think I understand your example, but I don't understand what makes
it necessary to introduce an ABC for Composable as separate from
Iterable. What is intended to be different about Composable? Can
you provide a usage example for Composable where Iterable would not
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