exception thrown from I/O interrupted by signal

[Volker Apelt]

Which exception is thrown from a I/O operation that is 
interrupted by a signal?

Which specification will catch it?

try:
   line = f.readline()
except WhatIsIt, e:
   print e

----- python lib docu
_underline_ added by me.
http://www.python.org/doc/current/lib/module-signal.html

7.1 signal -- Set handlers for asynchronous events 
# When a signal arrives during an I/O operation, it is _possible_ that the
I/O operation raises _an_exception_ after the signal handler returns. This
is dependent on the underlying Unix system's semantics regarding
interrupted system calls.  

-- 
Volker Apelt