Marko Rauhamaa <ma...@pacujo.net> writes:
> Ben Bacarisse <ben.use...@bsb.me.uk>:
>
>> Marko Rauhamaa <ma...@pacujo.net> writes:
>>> What I notice in my numbers is that about one half of my while loops
>>> are "while True", and about a third of my loops are while loops.
>>
>> I fo[u]nd the proportion on while True: loops surprising. Is there
>> something about Python that encourages that kind of loop?
(Thanks for th type correction. There is also s/of/on/.)
> Here's a typical example of such a loop in Python (ver 2):
>
> while True:
> try:
> snippet = os.read(rdfd, 1000)
> except OSError as e:
> if e.errno == errno.EAGAIN:
> return
> raise
> if not snippet:
> break
> self.stdout_snippets.append(snippet)
Thanks (and to Grant). IO seems to be the canonical example. Where
some languages would force one to write
c = sys.stdin.read(1)
while c == ' ':
c = sys.stdin.read(1)
and an Algol-68 style language would permit one to write
while (c := read char; c) do skip od
Python opts for
while True:
c = sys.stdin.read(1)
if c != ' ': break
(Forgive the atypical choice of input primitive -- it's for illustrating
the loop style only.)
<snip>
--
Ben.
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