On 2005-02-12, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > If a function that normally returns N values raises an exception, what > should it return?
Maybe it shouldn't return anything but instead of cathing the exception it should let the caller handle it. > N values of None seems reasonable to me, so I would > write code such as > > def foo(x): > try: > # code setting y and z > return y,z > except: > return None,None > > y,z = foo(x) > > If I try to use y or z inappropriately when they are None, the program > will stop. An alternative is to return an error flag in addition to y > and z from function foo and check the value of the error flag in the > calling program. This seems a bit awkward. what about the following. def foo(x): # code setting y and z return x,z try y,z = foo(x) except ... : # Handle errors. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
