On 19Aug2016 16:11, Lawrence D’Oliveiro <lawrenced...@gmail.com> wrote:
On Saturday, August 20, 2016 at 10:38:34 AM UTC+12, Chris Angelico wrote:
On Sat, Aug 20, 2016 at 8:31 AM, Lawrence D’Oliveiro wrote:
There is no short-cut evaluation when constructing tuples and lists.
I'm not sure how that would make difference in these examples. The
three parts are independent - the one place where short-circuiting is
important is indeed short-circuited.
That often is not the case, e.g.
<https://github.com/ldo/qahirah/blob/master/qahirah.py>:
assert \
(
len(self.points) == 0
or
not self.points[0].off
and
(closed or not self.points[-1].off)
)
Aye, but beware that the expression is actually correct for the indentation.
Compare:
assert \
(
len(self.points) == 0
and
not self.points[0].off
or
(closed or not self.points[-1].off)
where the precedence causes the layout to mislead.
I'm not arguing against indented spread out layout here, I use it myself, but
just mentioning that the human eye will tend to take the visual layout over a
strict parse. So care is needed, as in all programming.
Cheers,
Cameron Simpson <c...@zip.com.au>
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