Python DB API - commit() v. execute("commit transaction")?

[Jon Ribbens]

On 2017-05-31, Pavol Lisy <pavol.lisy at gmail.com> wrote:
> But althoug return from execute is undefined (
> https://www.python.org/dev/peps/pep-0249/#id16 ), you could iterate
> over cursor ( https://www.python.org/dev/peps/pep-0249/#iter )

... which is also optional.