I just had an issue brought up by another developer who had a
trailing comma on an assignment causing a 1-tuple he did not expect.
We were talking about it and came to the conclusion that it is at
least worth bringing up the idea of enforcing a SyntaxError in the
case of this. 1-tuple syntax is already an odd-man-out, so requiring
more explicitness about it would catch some errors and be more
readable. I think we could agree that a tuple of 2 or more elements
is much easier to read without parens than a 1-tuple without parens.
Aside from assignment I can't think of a single place when one would
construct a 1-tuple without parens.
This is the offending erroneous and hard-to-catch code:
if foo:
bar = 3,
L = [1,
2,
bar]
Would there be any possibility in considering further refining the 1-
tuple syntax to require parens because of its nature?
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