Le 26/09/2018 à 05:36, Chris Angelico a écrit :
On Wed, Sep 26, 2018 at 1:29 PM Mikhail V <mikhail...@gmail.com> wrote:
On Wed, Sep 26, 2018 at 5:38 AM Chris Angelico <ros...@gmail.com> wrote:
I like saying while "something": where the string describes the loop's
real condition. For instance, while "moar data": if reading from a
socket, or while "not KeyboardInterrupt": if the loop is meant to be
halted by SIGINT.
ChrisA
if doing so, would not it be more practical
to write is as an in-line comment then?
with new syntax it could be like this:
"""
while: # not KeyboardInterrupt
asd asd asd
asd asd asd
asd asd asd
"""
Similar effect, but I would find it better at least because it would
be highlighted as a comment and not as a string, + no quotes noise.
A comment is not better than an inline condition, no. I *want* it to
be highlighted as part of the code, not as a comment. Because it isn't
a comment - it's a loop condition.
For what it's worth, I'm not a fan of either solutions. In both cases
(string or comment), KeyboardInterrupt seems to be the only way to get
out of the loop, which which even if it were the case, it would breaks
the DRY idea, because if you add in the future a reason to break out of
the loop, you'd have to write the condition+break and update the
comment/string to still be consistent.
I don't think `while True:` is not explicit. If you think about it, True
will always evaluate positively (right??), so it can't be the hardest
part of learning Python.
But in some cases, mostly when I work on tiny microptyhon projects that
I share with non-python experts, where I avoid complicated code
fragments like comprehensions, I usually use `while "forever":` or
`while FOREVER:` (where forever was set to True before). In these case,
I don't need them to understand exactly why the loop is indeed infinite,
I just want them to know it is. But all these solutions are available
right now, without any syntax change.
About the original proposal, even though I'm not a native English
speaker, writing `while:` seems like an wobbling sentence, we are
waiting for it to be completed. My mind says "while what?" and tries to
find out if it's infinite or if it has to find the condition elsewhere
in the code (like some kind of do...until or do...while loop).
-Brice
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