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      1 # Copyright 2009 Brian Quinlan. All Rights Reserved.
      2 # Licensed to PSF under a Contributor Agreement.
      3 
      4 """Execute computations asynchronously using threads or processes."""
      5 
      6 __author__ = 'Brian Quinlan (brian (at] sweetapp.com)'
      7 
      8 from concurrent.futures._base import (FIRST_COMPLETED,
      9                                       FIRST_EXCEPTION,
     10                                       ALL_COMPLETED,
     11                                       CancelledError,
     12                                       TimeoutError,
     13                                       Future,
     14                                       Executor,
     15                                       wait,
     16                                       as_completed)
     17 from concurrent.futures.thread import ThreadPoolExecutor
     18 
     19 try:
     20     from concurrent.futures.process import ProcessPoolExecutor
     21 except ImportError:
     22     # some platforms don't have multiprocessing
     23     pass
     24