Andrei Kulakov <andrei....@gmail.com> added the comment:
I think the biggest issue here is not how to explain it clearly in the docs,
but that a lot of users will not confirm this in the docs based on the
combination of:
1. c{1,5} is similar to slicing, also similar to python list definition, and
python sets, all of which allow spaces for readability.
2. there is no error or warning
3. c{1,5} having one meaning and c{1, 5} having completely different meaning
with no warning is deeply weird unless you think thoroughly through all of the
implications.
I would prefer a warning to be added. This leads to the question, where do you
draw the line after which a warning is no longer added?
I think I would allow this form as the most extreme where warning is still
shown:
c{ 1, 5 }
For any extra commas, newlines, etc, I would not show warnings because they
look/feel different enough vs. {1,5}.
It seems to me that VERBOSE should have no effect inside of {1,5}.
----------
nosy: +andrei.avk
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<https://bugs.python.org/issue42469>
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