How to stop code after a given time

edit

My question is the following: sometimes a computation runs too long, and I would rather for it to stop automatically, and move on to the next computation (in the best possible world keep a list of the cases that were skipped).

So I wanted to implement the solution to this (essentially) identical question:

https://stackoverflow.com/questions/1...

However in my case the function "foo" uses some functionalities of GAP. This apparently causes a crash:

** Gap crashed or quit executing '__SAGE_LAST__:="__SAGE_LAST__";;AllSmallGroups(\$sage1);;' **
Restarting Gap and trying again

The crash happens immediately on the first call of the GAP function. Is there any way to avoid this?

EDIT

The suggestion with alarm did not work for me (maybe it has to with my implementation). Basically the first interruption works correctly (after 20 seconds), then follows five minutes where nothing happens, after these five minutes the second iteration of the for loop begins, this second iteration is

from cysignals.alarm import alarm, AlarmInterrupt, cancel_alarm

for i in range(0,10):
    try:
        alarm(20)    
        print("Began computation at", time.localtime())
        foo(i)
    except AlarmInterrupt:      
        print("Timed out with ", i, "at", time.localtime())
        cancel_alarm()  ## the presence or absence of this line does not change anything
    else:
        print("Completed with", i, "at", time.localtime())
        cancel_alarm()