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

[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.




-- 
Steven