I'd like to hear more about why the empty tuple has been selected as the default index. On Fri, Sep 25, 2020, 1:07 AM David Mertz <mertz@gnosis.cx> wrote:
Is this a breaking change? It feels borderline.
Keyword-only subscripts are permitted. The positional index will be the
empty tuple: obj[spam=1, eggs=2] # calls type(obj).__getitem__(obj, (), spam=1, eggs=2)
I.e. consider:
d = dict() d[()] = "foo" d {(): 'foo'}
I don't really object to this fact, and one could argue it's not a breaking change since a built-in dict will simply raise an exception with keyword arguments. However, it does make the empty tuple the "default key" for new objects that will accept keyword indices.
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