On 16.04.2020 0:34, Glenn Linderman wrote:
On 4/15/2020 12:47 PM, Ivan Pozdeev via Python-Dev wrote:
When writing a proof-of-concept implementation, however, I bumped into the need to distinguish which of the child objects are containers
(thus need to be wrapped as well) and which are the leaves (thus need to be returned as is). I guess this is going to be
application-specific. And the same problem will arise with any implementation, not only a wrapper.
Do the child objects truly need to be wrapped, or just accessed?
They need to be wrapped on the fly, to support nested ".key" accesses.
Thanks for your comments though, they inspired a thought.
The problem with the glom syntax versus the dotted syntax is that the minimal
syntax is bulky.
obj.abc.def.ghi versus glom( obj, 'abc.def.ghi')
The problem with attribute syntax is the conflict with regular attributes, and the limitation of valid identifier characters. Glom
probably doesn't have these problems.
"Glom syntax" still excludes the delimiter, whatever it is, from use in keys.
So it's still a further limitation compared to the JSON spec.
So my new thought is that we need a new syntax. The minimal existing syntax
might be
obj._('abc.def.ghi') or maybe obj['abc.def.ghi']
although the latter would conflict with regular dict lookups, but obj isn't a
regular dict, so that might not matter.
A new syntax might be:
obj.'abc.def.ghi'
In any of these syntaxes, one could enhance it to use variables in some spots similarly to f-strings (but from the beginning, so no 'f'
would be required)
foo = 'def'
obj.'abc.{foo}.ghi'
would access the same item as previous examples.
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--
Regards,
Ivan
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