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use slots for ParkingLot and Event #1944

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use slots for ParkingLot and Event #1944

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2 changes: 1 addition & 1 deletion trio/_core/_parking_lot.py
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Original file line number Diff line number Diff line change
Expand Up @@ -85,7 +85,7 @@ class _ParkingLotStatistics:
tasks_waiting = attr.ib()


@attr.s(eq=False, hash=False)
@attr.s(eq=False, hash=False, slots=True)
class ParkingLot(metaclass=Final):
"""A fair wait queue with cancellation and requeueing.

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2 changes: 1 addition & 1 deletion trio/_sync.py
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Expand Up @@ -10,7 +10,7 @@
from ._util import Final


@attr.s(repr=False, eq=False, hash=False)
@attr.s(repr=False, eq=False, hash=False, slots=True)
class Event(metaclass=Final):
"""A waitable boolean value useful for inter-task synchronization,
inspired by :class:`threading.Event`.
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