On Tue, Feb 18, 2020 at 09:04:21PM +0000, Paul Moore wrote: > This looks to me like Lua's `items()` function.
I can't find that function listed anywhere. https://www.lua.org/manual/5.3/ Are you maybe thinking of `pairs()`? https://www.lua.org/manual/5.3/manual.html#pdf-pairs > It's useful in Lua, > but I'm not sure there's any obvious reason to assume it'll be a > natural fit for idiomatic Python code. As people have said, do you > have a good Python example of real code where this would be useful? > (And where dct.items() or enumerate(lst) wouldn't be sufficient - code > that expects to work equally with lists or dictionaries seems more > Lua-like than Pythonic, IMO). In Lua, lists (arrays) *are* dictionaries, they keys are merely implicitly set to consecutive integers. My personal experience is that the analogy between (index, item) and (key, item) is more useful in theory and practice, but if I ever needed to do such a thing, a thin helper function: def items(dict_or_seq): try: return obj.items() except AttributeError: return enumerate(obj) would do the job. I don't think this is useful or important enough to turn it into a language-wide protocol. It's not as if the concept has much, if any, use outside of mappings and sequences. -- Steven _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/TO2HDDRJC5VLA6APR4NFVQRL72FYSOBX/ Code of Conduct: http://python.org/psf/codeofconduct/
