for -- else: what was the motivation?
Jach Feng
jfong at ms4.hinet.net
Sat Oct 8 22:33:07 EDT 2022
Axy 在 2022年10月8日 星期六上午11:39:44 [UTC+8] 的信中寫道:
> Hi there,
>
> this is rather a philosophical question, but I assume I miss something.
> I don't remember I ever used else clause for years I was with python and
> my expectation was it executed only if the the main body was never run.
> Ha-ha! I was caught by this mental trap.
>
> So, seriously, why they needed else if the following pieces produce same
> result? Does anyone know or remember their motivation?
>
> Just curious.
>
> Axy.
>
> print('--- with else')
>
>
> for i in [1,2,3]:
> print(i)
> else:
> print(4)
>
> for i in []:
> print(i)
> else:
> print(5)
>
> print('--- without else')
>
> for i in [1,2,3]:
> print(i)
> print(4)
>
> for i in []:
> print(i)
> print(5)
The else is always coming with the break, not the for. There are [for ...], [for...break...], and[for...break...else], but the [for...else] is insane.
--Jach
More information about the Python-list
mailing list