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["ChangBo Guo\(gcb\)" <glongwave@xxxxxxxxx>]

** Also affects: glance
   Importance: Undecided
       Status: New

** Changed in: glance
     Assignee: (unassigned) => ChangBo Guo(gcb) (glongwave)

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https://bugs.launchpad.net/bugs/1428424

Title:
  Remove use of contextlib.nested

Status in OpenStack Image Registry and Delivery Service (Glance):
  New
Status in OpenStack Compute (Nova):
  In Progress

Bug description:
      The contextlib.nested call has been deprecated
      in Python 2.7. This causes DeprecationWarning
      messages in the unit tests.
      
      There are also known issues with contextlib.nested
      that were addressed by the native support for
      multiple "with" variables. For instance, if the
      first object is created but the second one throws
      an exception, the first object's __exit__ is never
      called. For more information see
      https://docs.python.org/2/library/contextlib.html#contextlib.nested
      contextlib.nested is also not compatible in Python 3.

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