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-rw-r--r--Doc/library/asyncore.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/library/asyncore.rst b/Doc/library/asyncore.rst
index 0adf8d9..917d044 100644
--- a/Doc/library/asyncore.rst
+++ b/Doc/library/asyncore.rst
@@ -216,6 +216,10 @@ any that have been added to the map during asynchronous service) is closed.
empty bytes object implies that the channel has been closed from the
other end.
+ Note that :meth:`recv` may raise :exc:`BlockingIOError` , even though
+ :func:`select.select` or :func:`select.poll` has reported the socket
+ ready for reading.
+
.. method:: listen(backlog)