Terry Reedy <tjre...@udel.edu> writes: > On 7/15/2015 9:51 PM, Ben Finney wrote: > > What well-defined data type exists with the following properties: > > > > * Mapping, key → value. > > > > * Each key is a sequence (e.g. `tuple`) of items such as text strings. > > > > * Items in a key may be the sentinel `ANY` value, which will match any > > value at that position. > > > > * A key may specify that it will match *only* sequences of the same > > length. > > > > * A key may specify that it will match sequences with arbitrarily many > > additional unspecified items. > > Every key should signal which of the last two alterntives holds. One > can be a default. The signal can be 'in-band', in the tuple key > itself, or 'out-of-band', not in the tuple key.
Thanks. The part which puzzle me though: How do we teach the mapping type about that matching behaviour? -- \ “Without cultural sanction, most or all of our religious | `\ beliefs and rituals would fall into the domain of mental | _o__) disturbance.” —John F. Schumaker | Ben Finney -- https://mail.python.org/mailman/listinfo/python-list
