[Python-Dev] accumulator display syntax

[Alex Martelli]

On Friday 17 October 2003 06:38 pm, Skip Montanaro wrote:
   ...
>     Alex> ... just as e.g. foo[ 'va':23:2j, {'zip':'zop'}:45:(3,4) ] ...
>
> I have absolutely no idea how to interpret this.  Is this existing or
> proposed Python syntax?

Perfectly valid and current existing Python syntax:

>>> class F(object):
...   def __getitem__(self, x): return x
...
>>> foo=F()
>>> foo[ 'va':23:2j, {'zip':'zop'}:45:(3,4) ]
(slice('va', 23, 2j), slice({'zip': 'zop'}, 45, (3, 4)))

Not particularly _sensible_, mind you, and I hope nobody's yet
written any container that IS to be indexed by such tuples of
slices of multifarious nature.  But, indexing does stretch quite
far in the current Python syntax and semantics (in Python's
*pragmatics* you're supposed to use it far more restrainedly).


Alex