As yet, I don't have a particularly firm opinion on whether or not block
statements should support an 'else:' clause. And there are obviously a great
many other questions to be answered about how block statements might work that
are more important than this one.
Still, I've been tinkering with
On Sun, May 01, 2005, Nick Coghlan wrote:
>
> Option 0:
>No else clause allowed. Figured I should mention this, since it is
>Guido's last reported inclination, and my total lack of use cases for the
> other options below suggests this is the best idea for an initial
> implementation.
+1
[Nick Coghlan]
> As yet, I don't have a particularly firm opinion on whether or not block
> statements should support an 'else:' clause. And there are obviously a great
> many other questions to be answered about how block statements might work that
> are more important than this one.
>
> Still, I
Nick Coghlan wrote:
> Option 1: mimic try, for, while semantics
>An 'else' clause on a block statement behaves like the else clause on
> for and while loops, and on try/except statements - the clause is
> executed only if the managed suite completes 'normally' (i.e. it is not
> terminated e
GvR wrote:
> [Nick Coghlan]
> > Option 2: mimic if semantics
> >An 'else' clause on a block statement behaves vaguely like the else
clause on
> > an if statement - the clause is executed only if the first suite is
never
> > entered, but no exception occurs (i.e. StopIteration is raised by the
f
Anders J. Munch wrote:
> in opening('file1') as f1:
> ...
> in opening('file2') as f2:
> ...
> except IOError:
> print "file1 not available, I'll try again later"
>
> I rather like this version, because it is patently clear what should
> happen if there
Anders> How do I tell try/except that I really only meant to trap
Anders> opening('file1'), but opening 'file2' is not supposed to fail so
Anders> I want any exception from that propagated? Better if I could
Anders> write:
Anders> in opening('file1') as f1:
Anders>
On Mon, 02 May 2005 07:46:31 -0600, Shane Hathaway <[EMAIL PROTECTED]> wrote:
>Anders J. Munch wrote:
>> in opening('file1') as f1:
>> ...
>> in opening('file2') as f2:
>> ...
>> except IOError:
>> print "file1 not available, I'll try again later"
>>
>> I
[Guido, prsenting a use case]
> > block locking(myLock, timeout=30):
> > ...code executed with lock held...
> > else:
> > ...code executed if lock not acquired...
[Anders Munch]
> A file-closing block function has the same need, as does any block
> function that manages a resource,
