One other note that I'm surprised hasn't been brought up: In another thread, there is a discussion about what to use as sentinel objects -- often to indicate non-specified parameters, when None is a valid value. A number of people have proposed using the ellipses as such a value, as it already exists, is built in, is a singleton, has only specialized uses at the moment in different contexts, and is a good mnemonic for "missing". Apparently a number of people already use it that way. If Ellipses that does become a standard recommend sentinel object -- that might be a motivator for making it a special word, like None. However, I"m still a bit confused as to why the rep of the ellipses object isn't it's literal already. Is there any other example of this? In [1]: repr(list()) Out[1]: '[]' In [2]: repr(dict()) Out[2]: '{}' Hmm -- there is set: In [3]: repr(set()) Out[3]: 'set()' which breaks eval if you rebind it. Though it doesn't use the name if it's not empty: In [16]: s = {1,2,3} In [17]: repr(s) Out[17]: '{1, 2, 3}' In the end, I think this is an argument for not using ellipses as a standard sentinel, rather than an argument for making "Ellipses" more special. -CHB On Tue, Jun 1, 2021 at 4:33 AM Steven D'Aprano <steve@pearwood.info> wrote:
On Tue, Jun 01, 2021 at 08:28:56PM +1000, Steven D'Aprano wrote:
One easy change would be to just drop the capital E and call it "ellipsis" (without the quotes), or even "the ellipsis symbol". To my mind, that makes it clear we're talking about the symbol, not the builtin name.
https://bugs.python.org/issue44278
Thanks Serhiy!
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-- Christopher Barker, PhD (Chris) Python Language Consulting - Teaching - Scientific Software Development - Desktop GUI and Web Development - wxPython, numpy, scipy, Cython