Appreciate the feedback. I was hoping to get as much perspective as possible.
On Saturday, August 24, 2013 12:18:59 AM UTC-7, Dave Angel wrote: > snarf wrote: > > > > > Greetings, > > > > > > As I tread through my journey of OO I am trying to determine if there is a > > good approach for exception handling within classes. > > > > > > From my readings and gatherings - it seems I have found a common theme, but > > I am trying to solicit from the experts. > > > > > > Here is what I have found (I may be restating the obvious so please forgive > > me in advance): > > > > > > * Seems like exception handing within Classes is largely avoided and is > > typically only used when calling external libraries. > > > * Try/Except type statements seem to be used more within modules, main > > functions, wrapper scripts. > > > > Exceptions are used when useful. I don't see any bias towards any one > > location. > > > > > * Classes should be coded in a way that exceptions > > > > You seem to be missing the last part of this sentence. > > > > > * Better to never write your own exceptions (unless you absolutely have to). > > > > If you mean to avoid writing exception classes, then I say nonsense. > > Just derive them from the closest meaningful exception class, so that a > > user can combine handlers when reasonable. > > > > > * Using Exception is typically a bad. More specific the better. > > > > If you mean in an except statement, then I'd agree. > > > > > * Exceptions should never fail silently. (Should exceptions always be > > logged?) > > > > Exceptions should be caught if you can handle them, or if you need to > > convert them to a different exception that someone further up the stack > > can handle. Sometimes handling means do nothing. > > > > > > > > Best site I have found for exceptions (hopefully this helps someone): > > > * http://c2.com/cgi/wiki?ExceptionPatterns > > > > But that's for Java. java is not C++, and neither is it Python. For > > one thing, Python exception overhead is deliberately much less, and they > > are used more freely. > > > > Notice that exceptions are used to terminate for loops, and that's a > > *normal* exit to the loop. They also appear in other places under the > > covers. Don't be afraid of them. > > > > -- > > DaveA -- http://mail.python.org/mailman/listinfo/python-list
