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Brett Cannon 2013-10-25 13:53:06 -04:00
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Doc/library/concurrent.futures.rst
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@ -164,6 +164,9 @@ uses a pool of processes to execute calls asynchronously.
allows it to side-step the :term:`Global Interpreter Lock` but also means that
only picklable objects can be executed and returned.
The ``__main__`` module must be importable by worker subprocesses. This means
that :class:`ProcessPoolExecutor` will not work in the interactive interpreter.
Calling :class:`Executor` or :class:`Future` methods from a callable submitted
to a :class:`ProcessPoolExecutor` will result in deadlock.