Creating objects you don't actually want

[Scott David Daniels]

sid wrote:

> ...  this could be written as
> for item in os.lsitdir('dir')
>     try:
>         sfx = sfxobject(item)
>     except sfxobjectError:
>         pass
> 
>>for item in os.listdir('dir'):
>>    if os.isfile(item):
>>        sfx = sfxobject(item)
> this is a better way.

I'd disagree.  Try and handle failure solves funny instances, such as
Just after os.isfile(item) a separate process deletes the file.  Then
sfxobject(item) will fail, because the test tested something that was
true in the past.  Just go ahead and handle failure often works better
than "look before you leap."

-- 
-Scott David Daniels
Scott.Daniels at Acm.Org