Terry J. Reedy added the comment:
Kristján, thank you for the response. The socket communication part of IDLE is
pretty much a black box to me. Just to clarify, you are saying that select
polling is only needed for non-blocking sockets; sockets are blocking by
default; and you see no override of the default. Me neither. It would be nice
to know. Idlelib.PyShell has the following lines:
<445> self.rpcclt.listening_sock.settimeout(10)
<561> response = clt.pollresponse(self.active_seq, wait=0.05)
The wait is ultimately passed to rpc.py, line 353:
r, w, x = select.select([self.sock.fileno()], [], [], wait)
(IDLE is very much in use, and I hope to modernize the 3.x version, and perhaps
replace the sockets with non-blocking use of pipes.)
Michael: I cannot change 2.7.5 and I am not inclined to change 2.7.12+ until I
know there is a problem with the current 2.7 release. Numerous people are
using IDLE with 2.7.11 (and 3.x) on Windows without problems.
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<http://bugs.python.org/issue26739>
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