On 2021-07-16 12:44, Stephen J. Turnbull wrote:
> Thomas Grainger writes:
>
>   > Another example, is a cash point (ATM) won't give you your money
>   > until you take your card
>
> That ATM is effective in enforcing the desired behavior.  In Python
> you would usually use an exception to force handling.  Returning
> status codes, or couples of status codes and values, isn't nearly as
> effective.
>
> And a (status, value) couple does nothing to encourage checking the
> code over (value, status).
>
To me, it makes more sense to return (status, value) than (value,
status) because it's clearer to say "that didn't work, so you can just
ignore the value" than "here's a value, but it didn't work, so just
ignore the value even though I mentioned it first".
_______________________________________________
Python-ideas mailing list -- python-ideas@python.org
To unsubscribe send an email to python-ideas-leave@python.org
https://mail.python.org/mailman3/lists/python-ideas.python.org/
Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/MUAGZXQ3A6CUHL5O6GSGHOECKIJVA2Q3/
Code of Conduct: http://python.org/psf/codeofconduct/