[Python-Dev] PEP 409 and the stdlib

[Hrvoje Niksic]

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.

Hrvoje