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r� Y n X e j ZZ dS )z.A Future class similar to the one in PEP 3148.)�CancelledError� TimeoutError�InvalidStateError�Future� wrap_future�isfuture� N� )� base_futures)�events)�format_helpersc @ s� e Zd ZdZeZdZdZdZdZ dZ
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- Callbacks registered with add_done_callback() are always called
via the event loop's call_soon().
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methods in the concurrent.futures package.
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