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On Solaris, calls to select.select() and
socket.socket() in telnetlib (and possibly others)
often fail due to unhandled EINTR signals from the OS
while select() is polling.
I think this problem is Solaris-specific since Solaris
has interruptible non-restartable sytem calls.
This behavior is apparently a known issue with the
system API select(); see
 man -s3c select
and
http://lists.community.tummy.com/pipermail/frpythoneers/2000-August/000122.html
The recommend fix from frpythoneers is to wrap the
select (and socket, respectively) calls in a loop:
while True:
 try:
 select.select(...)
 break
 except select.error, v:
 if v[0] == errno.EINTR: continue
 else: raise 
It's probably more appropriate to put the
exception-handling *inside* select.select (and
socket.socket) but that's beyond my expertise...
OS: SunOS 5.9 Generic_112233-11 sun4u sparc
SUNW,Sun-Blade-100

assigning all open telnetlib items to myself

The telnetlib now uses the new selectors introduced in Python 3.4: see the issue #19170. The selectors module handles InterruptedError (EINTR): it returns an empty list of events in this case.
The changeset f713d9b6393c of the issue #19170 fixed this issue.
Sorry for the delay, 10 years to fix this bug... It's probably because the telnetlib module is not widely used...

By the way, the bug was only fixed in Python 3.4 and later. I'm not interested to fix it in older Python versions.