Re: delayed sys.exit?
In the attached http://www.nabble.com/file/p24726902/test.py test.py code, it appears that additional statements execute after the call to sys.exit(0). I'll be grateful if anyone can shed light on why this is happening. Below is a copy of some sample I/O. Note that in the last case I get additional output after what should be the final error message. A bare except: catches ALL exceptions; including SystemExit which is generated by sys.exit. And KeyboardInterrupt, too. That's why its basically a bad idea to use bare excepts unless you really, really, really need to. Try 'except Exception' instead. SystemExit and such do not inherit from Exception. --S -- http://mail.python.org/mailman/listinfo/python-list
Re: delayed sys.exit?
Dr. Phillip M. Feldman wrote: In the attached http://www.nabble.com/file/p24726902/test.py test.py code, it appears that additional statements execute after the call to sys.exit(0). I'll be grateful if anyone can shed light on why this is happening. Below is a copy of some sample I/O. Note that in the last case I get additional output after what should be the final error message. In [126]: run test Input a string: 1,2 [1, 2] In [127]: run test Input a string: 1-3 [1, 2, 3] In [128]: run test Input a string: 1,4,5-12 [1, 4, 5, 6, 7, 8, 9, 10, 11, 12] In [129]: run test Input a string: 0 ERROR: 0 is invalid; run numbers must be positive. ERROR: '0' is not a valid run number. sys.exit raises an SystemExit exception, which then gets caught by the bare 'except' of the enclosing try...except... statement. A lot of things can raise an exception, which is why bare 'except's are a bad idea; catch only those you expect. -- http://mail.python.org/mailman/listinfo/python-list
Re: delayed sys.exit?
Dr. Phillip M. Feldman wrote: In the attached http://www.nabble.com/file/p24726902/test.py test.py code, it appears that additional statements execute after the call to sys.exit(0). try: # If the conversion to int fails, nothing is appended to the list: Runs.append(int(strs[i])) if Runs[-1] = 0: print 'ERROR: ' + str(Runs[-i]) + \ ' is invalid; run numbers must be positive.' sys.exit(0) except: sys.exit() works by raising a SystemExit exception which is caught by the bare except. http://docs.python.org/library/sys.html#sys.exit http://docs.python.org/library/exceptions.html#exceptions.SystemExit As a general rule try to be as specific as possible when catching exceptions. Peter -- http://mail.python.org/mailman/listinfo/python-list
