[Tutor] signals and frame objects

[Kent Johnson]

If you return from the handler, processing will continue where it was 
interrupted. If you want to inspect the frame object in your handler, some 
information about it is available here:
http://docs.python.org/ref/types.html#l2h-142

For example, running this program in IDLE on MacOSX:
#############################
import signal

done = 0
def handler(signum, frame):
     print frame
     print dir(frame)
     print 'Signal handler called with signal', signum
     global done
     done = 1

# Set the signal handler and an alarm
signal.signal(signal.SIGALRM, handler)
signal.alarm(3)

print "Looping"
while not done:
     pass

print "Out of loop"

signal.alarm(0)          # Disable the alarm

print "Done"
##############################3

gives this output:
 >>> ================================ RESTART ================================
 >>>
Looping
<frame object at 0x4fd6c0>
['__class__', '__delattr__', '__doc__', '__getattribute__', '__hash__', 
'__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', 
'__setattr__', '__str__', 'f_back', 'f_builtins', 'f_code', 
'f_exc_traceback', 'f_exc_type', 'f_exc_value', 'f_globals', 'f_lasti', 
'f_lineno', 'f_locals', 'f_restricted', 'f_trace']
Signal handler called with signal 14
Out of loop
Done
 >>>

Kent


At 09:23 AM 9/15/2004 -0700, Marilyn Davis wrote:
>Hello Tutors,
>
>I'm setting a signal.alarm() and I am successful in catching it in my
>handler function.  The parameters given to me in my handler include
>the stack frame.  Is there some way I can use that stack frame to
>continue processing?
>
>Thank you for any help anyone can give.
>
>Marilyn Davis
>
>--
>
>_______________________________________________
>Tutor maillist  -  Tutor at python.org
>http://mail.python.org/mailman/listinfo/tutor