On 21/07/14 07:57, yarteydegre...@gmail.com wrote:
I just want to know if an unhandled exception is a bug in my programs!
No, its not. Maybe. Exceptions can happen for all sorts of reasons, for some you can do something if they happen. In those cases handling the exception makes sense. In other cases the exception can't be usefully handled so there is little point in creating a handler. Just allow the exception to happen and display the stack trace. So if you can reasonably expect an exception to happen and can do something sensible about it (like trying to open a non existent file, say) you should handle it and not doing so would arguably be a bug. But if you can't do anything sensible with the exception (an out of memory error for example(*)) you might as well just let it happen. The final twist is that your client might not like to see user-hostile error messages. I that case use a general except clause and log the error where you can find it but the user gets a nice friendly message instead. (*)Of course in critical apps running out of memory could be seen as a bug. But nonetheless not catching the exception when it happens is not the problem. Memory errors usually need to be prevented not handled after the fact. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.flickr.com/photos/alangauldphotos _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
