| 1 | n/a | __all__ = [] |
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| 2 | n/a | |
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| 3 | n/a | import concurrent.futures._base |
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| 4 | n/a | import reprlib |
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| 5 | n/a | |
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| 6 | n/a | from . import events |
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| 7 | n/a | |
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| 8 | n/a | Error = concurrent.futures._base.Error |
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| 9 | n/a | CancelledError = concurrent.futures.CancelledError |
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| 10 | n/a | TimeoutError = concurrent.futures.TimeoutError |
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| 11 | n/a | |
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| 12 | n/a | |
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| 13 | n/a | class InvalidStateError(Error): |
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| 14 | n/a | """The operation is not allowed in this state.""" |
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| 15 | n/a | |
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| 16 | n/a | |
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| 17 | n/a | # States for Future. |
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| 18 | n/a | _PENDING = 'PENDING' |
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| 19 | n/a | _CANCELLED = 'CANCELLED' |
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| 20 | n/a | _FINISHED = 'FINISHED' |
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| 21 | n/a | |
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| 22 | n/a | |
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| 23 | n/a | def isfuture(obj): |
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| 24 | n/a | """Check for a Future. |
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| 25 | n/a | |
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| 26 | n/a | This returns True when obj is a Future instance or is advertising |
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| 27 | n/a | itself as duck-type compatible by setting _asyncio_future_blocking. |
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| 28 | n/a | See comment in Future for more details. |
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| 29 | n/a | """ |
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| 30 | n/a | return (hasattr(obj.__class__, '_asyncio_future_blocking') and |
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| 31 | n/a | obj._asyncio_future_blocking is not None) |
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| 32 | n/a | |
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| 33 | n/a | |
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| 34 | n/a | def _format_callbacks(cb): |
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| 35 | n/a | """helper function for Future.__repr__""" |
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| 36 | n/a | size = len(cb) |
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| 37 | n/a | if not size: |
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| 38 | n/a | cb = '' |
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| 39 | n/a | |
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| 40 | n/a | def format_cb(callback): |
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| 41 | n/a | return events._format_callback_source(callback, ()) |
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| 42 | n/a | |
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| 43 | n/a | if size == 1: |
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| 44 | n/a | cb = format_cb(cb[0]) |
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| 45 | n/a | elif size == 2: |
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| 46 | n/a | cb = '{}, {}'.format(format_cb(cb[0]), format_cb(cb[1])) |
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| 47 | n/a | elif size > 2: |
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| 48 | n/a | cb = '{}, <{} more>, {}'.format(format_cb(cb[0]), |
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| 49 | n/a | size - 2, |
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| 50 | n/a | format_cb(cb[-1])) |
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| 51 | n/a | return 'cb=[%s]' % cb |
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| 52 | n/a | |
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| 53 | n/a | |
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| 54 | n/a | def _future_repr_info(future): |
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| 55 | n/a | # (Future) -> str |
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| 56 | n/a | """helper function for Future.__repr__""" |
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| 57 | n/a | info = [future._state.lower()] |
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| 58 | n/a | if future._state == _FINISHED: |
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| 59 | n/a | if future._exception is not None: |
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| 60 | n/a | info.append('exception={!r}'.format(future._exception)) |
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| 61 | n/a | else: |
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| 62 | n/a | # use reprlib to limit the length of the output, especially |
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| 63 | n/a | # for very long strings |
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| 64 | n/a | result = reprlib.repr(future._result) |
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| 65 | n/a | info.append('result={}'.format(result)) |
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| 66 | n/a | if future._callbacks: |
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| 67 | n/a | info.append(_format_callbacks(future._callbacks)) |
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| 68 | n/a | if future._source_traceback: |
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| 69 | n/a | frame = future._source_traceback[-1] |
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| 70 | n/a | info.append('created at %s:%s' % (frame[0], frame[1])) |
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| 71 | n/a | return info |
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