[Python-ideas] Special-case 3.x 'print x' SyntaxError

[Mike Müller]

Am 15.09.14 15:46, schrieb Steven D'Aprano:
> On Mon, Sep 15, 2014 at 11:50:26AM +0200, Mike Müller wrote:
> 
>> In general, I think the single most useful improvement for beginners are
>> better hints in error message about what possibly went wrong.
>>
>> If this goes beyond syntax errors, adding a switch to turn this off might
>> be useful. Just in case somebody actually scrapes messages or your doctests
>> break.
> 
> The exact exception message is not a part of the public API of Python 
> built-ins or the standard library, so any code which relies on that is 
> wrong. Error messages are subject to change without notice. As for doc 
> tests, the doctest module has a directive specifically for ignoring the 
> exception error message:
> 
> https://docs.python.org/3/library/doctest.html#doctest.IGNORE_EXCEPTION_DETAIL
> 
> Just add  #doctest:+IGNORE_EXCEPTION_DETAIL  to your test, and the 
> message will be ignored.

Thanks for the hints. Actually, I am familiar with both points.
Even though quite a bit ugly code is out there, it maybe better to enforce
good programming style instead of adding switches that allow such code to run.
So, no switch.

Mike