[issue22348] Documentation of asyncio.StreamWriter.drain()

[Martin Richard]

Martin Richard added the comment:

Here is an other patch which mentions high and low water limits. I think it's better to talk about it, since it tells extactly what a "full buffer" and "partially drained" means.

On the other hand, StreamWriter wraps the transport but does not expose the set/get_write_buffer_limits() directly, you reach then through stream_writer.transport (which makes sense, StreamWriter is here to help writing, not to do plumbery) - so I did not mention the functions.

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Added file: http://bugs.python.org/file36606/asyncio-streams-drain-doc-water-limits.patch

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