+1 on (lazy) Sequence views optimized for sequential reads and random access (which hide the dict implementation which varies across which platforms?) I'm somewhat indifferent on the name: # Sequence views names: ## method() -> Sequence - orderedkeys(), orderedvalues(), ordereditems() - okeys(), ovalues(), oitems() - keys(), keysordered(), values(), valuesordered(), items(), itemsordered() - What does this do with tab-completion? # Get key, value, item by integer-location method names: ## method(start: int, stop: int, step: int) -> Any - keys_iloc(), values_iloc(), items_iloc() ## __getitem__(slice_or_int: Union[slice, int]) -> Any - keys[0], values.iloc[1:4:2], items.iloc[1:4, 2:3] - keys_iloc[], values_iloc[], items_iloc[] - keysiloc[], valuesiloc[], itemsiloc[] - keys.iloc[], values.iloc[], items.iloc[] - keypos(), ## method(index: int) -> Any: - getkey(), getvalue(), getitem( # Get integer-location of a key, of a value: ## method(value) -> int, method(value) -> - index(value) - this is compatible with list.index and str.index but incompatible with Series/Dataframe.index (which may or may not be irrelevant) - orderedkeys.index(), orderedvalues.index() - okeys.index(), ovalues.index() - keys.ordered.index(), values.ordered.index() - getkeypos(), getvaluepos() - getkeyiloc(), getvalueiloc() ... Thoughts: - what did i miss? - is there an opportunity to optimize performance of e.g getvaluepos() / values.ordered.index()? - performance considerations between islice(dict_view) and Sequence.__getitem__? On Fri, Jul 31, 2020 at 11:17 AM Ricky Teachey <ricky@teachey.org> wrote:
On Fri, Jul 31, 2020 at 10:31 AM Guido van Rossum <guido@python.org> wrote:
So maybe we need to add dict.ordered() which returns a view on the items that is a Sequence rather than a set? Or ordereditems(), orderedkeys() and orderedvalues()?
I for one would be +1 on this idea.
On the bike shed hew: oitems(), okeys(), and ovalues() would be much shorter, and shouldn't be too difficult to read once they get established (though i am sure many will differ on this point).
--- Ricky.
"I've never met a Kentucky man who wasn't either thinking about going home or actually going home." - Happy Chandler