[Python-Dev] PEP 409 and the stdlib

[Serhiy Storchaka]

21.05.13 10:17, Hrvoje Niksic написав(ла):
> On 05/20/2013 05:15 PM, Ethan Furman wrote:
>> 1)  Do nothing and be happy I use 'raise ... from None' in my own
>> libraries
>>
>> 2)  Change the wording of 'During handling of the above exception,
>> another exception occurred' (no ideas as to what at
>> the moment)
>
> The word "occurred" misleads one to think that, during handling of the
> real exception, an unrelated and unintended exception occurred.  This is
> not the case when the "raise" keyword is used.  In that case, the
> exception was intentionally *converted* from one type to another.  For
> the "raise" case a wording like the following might work better:
>
>      The above exception was converted to the following exception:
>      ...
>
> That makes it clear that the conversion was explicit and (hopefully)
> intentional, and that the latter exception supersedes the former.

How do you distinguish intentional and unintentional exceptions?