cascading python executions only if return code is 0

[Steven D'Aprano]

Roy Smith 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.

Time goes backwards by one hour[1] at least once a year across most of the
world. 

http://infiniteundo.com/post/25509354022/more-falsehoods-programmers-believe-about-time-wisdom



[1] Unless it's less than an hour. Or more than one hour.


-- 
Steven