[Zope] deleting while iterating over ObjectManager

[Charlie Reiman]

I've never done this but it should be fine. The only problem with mutation
and iteration is if you continue to iterate over the mutated list:

for item in folder.objectValues():
  item.do_something()
  if blah:
    folder.manage_delObjects(item.getId())


This pattern can result in items getting skipped in some
languages/environments. But I've never encountered a system that cares what
you do once you have decided to stop iterating.

> -----Original Message-----
> From: zope-admin@zope.org [mailto:zope-admin@zope.org]On Behalf Of John
> Hunter
> Sent: Monday, October 21, 2002 10:17 AM
> To: Zope Users
> Subject: [Zope] deleting while iterating over ObjectManager
>
>
>
> Is it safe to delete instances while iterating over the contents of an
> ObjectManager instance, as in:
>
> for item in folder.objectValues():
>   if some_condition:
>     folder.manage_delObjects(item.getId())
>     break
>   do_something(item)
>
>
> Thanks,
> John Hunter
>
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