cascading python executions only if return code is 0

[Chris Angelico]

On Fri, Dec 27, 2013 at 12:37 PM, Roy Smith <roy at panix.com> wrote:
> In article <mailman.4567.1387819120.18130.python-list at python.org>,
>  Ethan Furman <ethan at stoneleaf.us> wrote:
>
>> Mostly I don't want newbies thinking "Hey!  I can use assertions for all my
>> confidence testing!"
>
> How about this one, that I wrote yesterday;
>
>         assert second >= self.current_second, "time went backwards"
>
> I think that's pretty high up on the "can never happen" list.

assert second >= self.current_second, "user changed the clock"

ChrisA