Shane Hathaway wrote:
> For each block statement, it is necessary to create a *new* iterator,
Right.
> since iterators that have stopped are required to stay stopped. So at a
> minimum, used-defined statements will need to call something, and thus
> will have parentheses. The parentheses might be enough to make block
> statements not look like built-in keywords.
>
> PEP 340 seems to punish people for avoiding the parentheses:
>
> transaction = begin_transaction()
>
> transaction:
> db.execute('insert 3 into mytable')
>
> transaction:
> db.execute('insert 4 into mytable')
>
> I expect that only '3' would be inserted in mytable. The second use of
> the transaction iterator will immediately raise StopIteration.
Yes, but wouldn't you think that people would misunderstand it in this way?
Reinhold
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