In a message of Mon, 05 Oct 2015 22:39:13 +0100, Mark Lawrence writes: >On 05/10/2015 18:46, richard kappler wrote: >> I'm reading up on exception handling, and am a little confused. If you have >> an exception that just has 'pass' in it, for example in a 'for line in >> file:' iteration, what happens? Does the program just go to the next line? >> >> EX: >> >> for line in file: >> try: >> do something >> except: >> pass >> >> I know (so many of you have told me :-) that using pass is a bad idea, but >> how else do you skip the current line if the 'try' can't be done, and go on >> to the next line exiting the program with a trace error? >> >> regards, Richard > >Don't put the `try: except:` there in the first place. This is the best >way to approach development. Let Python throw all your programming >errors at you, then refine your code to catch the ones you need to. See >https://docs.python.org/3/library/exceptions.html#exception-hierarchy >for the ones you would potentially need to catch for file handling under >OSError. > >One must also add the obligatory never use a bare `except:` > >-- >My fellow Pythonistas, ask not what our language can do for you, ask >what you can do for our language. > >Mark Lawrence
I think this depends on what the script is doing. For commerical, production use you generally want to find out what the errors are and do something reasonable for them -- but for my own use there are plenty of times when I want to run this thing once. If it runs into trouble I want it to keep on trying to do its thing. The only thing I might consider doing with any exceptions that get raised is logging them before ignoring them. The worst thing that could happen is for the script to quit running after a few hours because some wretched exception I wasn't ready for happened. This means I will have to add that exception to the list of things to ignore and run the thing again next night ... Laura _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
