[Python-ideas] syntax to continue into the next subsequent except block

[Rob Cliffe]

On 15/09/2012 09:21, Paul Wiseman wrote:
> On 14 September 2012 02:52, Stephen J. Turnbull <stephen at xemacs.org 
> <mailto:stephen at xemacs.org>> wrote:
>
>     Terry Reedy writes:
>
>      > try:
>      >    try:
>
>     Ugh-ugh.<0.5 wink>
>
>      > try:
>      >      operation()
>      > except Exception as err:
>      >      if isinstance(err, IOError) and err.errno == 2:
>
>     Ugh.<0.5 wink>
>
>     Not your fault, but these constructions are pretty ugly IMO, I have to
>     go with the OP on that.
>
>     ISTR there were discussions of "qualified except" clauses here maybe
>     6mo to 1yr ago?  That is, they'd look something like
>
>     try:
>          operation()
>     except IOError as err if err.errno == 2:
>          do_something()
>     except Exception:
>          logger.error("Error performing operation:
>     {}".format(err.message)")
>          some_clean_up()
>          raise
>
>     Again ISTR that this got spiked for some reason, but maybe it will be
>     of use to the OP in formulating his next idea.  Sorry for the lack of
>     precise reference.
>
>
> I like that "qualified except". Almost goes without saying it's a much 
> better idea/solution that my idea of a continue (which has already 
> pointed out to be flawed- I'm not sure why now I thought it was always 
> a syntax error)
I really like this qualified except!  It's meaning is intuitively 
obvious - AND it's useful.
Rob Cliffe
>
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