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Sun Oct 25 19:51:26 CET 2009 · https://mail.python.org/pipermail/python-dev/2009-October/093316.html

> Hmm, perhaps when using sets as work queues?

A number of comments:

- it's somewhat confusing to use a set as a *queue*, given
  that it won't provide FIFO semantics.
- there are more appropriate and direct container structures
  available, including a dedicated Queue module (even though
  this might be doing to much with its thread-safety).
- if you absolutely want to use a set as a work queue,
  then the .pop() method should be sufficient, right?

Regards,
Martin

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[Python-Dev] Retrieve an arbitrary element from a set without removing it