Bruno Desthuilliers wrote: > Carl J. Van Arsdall wrote: > >> Sybren Stuvel wrote: >> >> >>> Ant enlightened us with: >>> >>> >>> >>>> try: >>>> assertion = callable.is_assertion >>>> except: >>>> pass >>>> >>>> >>> Try to make a habit out of catching only the exceptions you know will >>> be thrown. Catching everything generally is a bad idea. In this case, >>> my bet is that catching AttributeError is enough. >>> >>> >>> >> What about doing exception kind of like a C switch statement with a >> default case: >> >> try: >> do_something() >> except TypeError: >> fix_something() >> except: >> print "Unknown error, you are doomed" >> traceback.print_exc() #something to print the traceback >> exit_gracefully() >> >> Is this frowned upon? You still handle the error and you know where it >> happened and what happened. Anything wrong with this? I don't like the >> idea of my system crashing for any reason. >> > > It may be a good idea to do something like this *at the top level of the > application*. But take time to carefully read the standard exceptions > hierarchy in the fine manual - you'll notice some exception you perhaps > don't want to catch or at least don't want to display (hint: look for > the warnings hierarchy and for SysExit...) > > Hrmms, well, here's an interesting situation. So say we wanna catch most exceptions but we don't necessarily know what they are going to be. For example, I have a framework that executes modules (python functions), the framework wraps each function execution in a try/except block in order to compensate for what *might* happen. Upon coding the framework I really have no idea what types of problems these modules might have but I want to catch these errors so that I can clean up and exit gracefully, not only that but I want to dump the exception to log files so that we can attempt to fix it. So, I have the option of catching all standard exceptions and not list the ones I know I don't want to catch. But what about user defined exceptions? Do I then have to enforce policies on the system stating what types of exceptions can be raised?
Is there a way in python to say, "hey, catch everything but these two"? -- Carl J. Van Arsdall [EMAIL PROTECTED] Build and Release MontaVista Software -- http://mail.python.org/mailman/listinfo/python-list
