外观
projections API
模块说明
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Recoverable display projections; effect decisions still use Authority evidence.Projection
python
class ProjectionSDK 说明：
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One atomically replaced baseline, with a synchronous pure delta reducer.
``snapshot`` is a detached ViewSnapshot; its complete flag becomes false as
soon as the underlying Watch loses continuity. ``read`` reopens invalidated
cursors and returns the next baseline or reduced snapshot. No action or
callback is replayed, and incomplete source observations remain incomplete.Projection.__init__
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def __init__(self, bus, member, reducer, options)Projection.open
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@classmethod
async def open(cls, bus, member, reducer, **options)Projection.snapshot
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@property
def snapshot(self)Projection.read
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async def read(self)Projection.__aiter__
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def __aiter__(self)Projection.__anext__
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async def __anext__(self)Projection.__aenter__
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async def __aenter__(self)Projection.__aexit__
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async def __aexit__(self, *exc)Projection.close
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async def close(self)