/usr/lib/python3.7/asyncio/base_futures.py is in libpython3.7-stdlib 3.7.0~b3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | __all__ = ()
import concurrent.futures._base
import reprlib
from . import format_helpers
Error = concurrent.futures._base.Error
CancelledError = concurrent.futures.CancelledError
TimeoutError = concurrent.futures.TimeoutError
class InvalidStateError(Error):
"""The operation is not allowed in this state."""
# States for Future.
_PENDING = 'PENDING'
_CANCELLED = 'CANCELLED'
_FINISHED = 'FINISHED'
def isfuture(obj):
"""Check for a Future.
This returns True when obj is a Future instance or is advertising
itself as duck-type compatible by setting _asyncio_future_blocking.
See comment in Future for more details.
"""
return (hasattr(obj.__class__, '_asyncio_future_blocking') and
obj._asyncio_future_blocking is not None)
def _format_callbacks(cb):
"""helper function for Future.__repr__"""
size = len(cb)
if not size:
cb = ''
def format_cb(callback):
return format_helpers._format_callback_source(callback, ())
if size == 1:
cb = format_cb(cb[0][0])
elif size == 2:
cb = '{}, {}'.format(format_cb(cb[0][0]), format_cb(cb[1][0]))
elif size > 2:
cb = '{}, <{} more>, {}'.format(format_cb(cb[0][0]),
size - 2,
format_cb(cb[-1][0]))
return f'cb=[{cb}]'
def _future_repr_info(future):
# (Future) -> str
"""helper function for Future.__repr__"""
info = [future._state.lower()]
if future._state == _FINISHED:
if future._exception is not None:
info.append(f'exception={future._exception!r}')
else:
# use reprlib to limit the length of the output, especially
# for very long strings
result = reprlib.repr(future._result)
info.append(f'result={result}')
if future._callbacks:
info.append(_format_callbacks(future._callbacks))
if future._source_traceback:
frame = future._source_traceback[-1]
info.append(f'created at {frame[0]}:{frame[1]}')
return info
|