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pycompat: fix demand import handling of Queue...

pycompat: fix demand import handling of Queue When demandimport is enabled, simply importing a non existent module does not trigger ImportError, a property access is necessary.

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      # pycompat.py - portability shim for python 3

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      """Mercurial portability shim for python 3.

      This contains aliases to hide python version-specific details from the core.

      """

      from __future__ import absolute_import

      try:

          import Queue as _queue

          _queue.Queue

      except ImportError:

          import queue as _queue

      empty = _queue.Empty

      queue = _queue.Queue

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				# pycompat.py - portability shim for python 3
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				"""Mercurial portability shim for python 3.

				This contains aliases to hide python version-specific details from the core.
				"""

				from __future__ import absolute_import

				try:
				import Queue as _queue
				_queue.Queue
				except ImportError:
				import queue as _queue
				empty = _queue.Empty
				queue = _queue.Queue