[Python-ideas] with statement syntax forces ugly line breaks?

Terry Reedy tjreedy at udel.edu
Thu Sep 9 22:55:15 CEST 2010


On 9/9/2010 8:14 AM, Georg Brandl wrote:
> Am 09.09.2010 07:49, schrieb Mark Summerfield:
>> Hi Nathan,
>>
>> On Wed, 8 Sep 2010 13:00:25 -0400
>> Nathan Schneider<nathan at cmu.edu>  wrote:
>>> Mark,
>>>
>>> I have approached these cases by using the backslash
>>> line-continuation operator:
>>>
>>> with FakeContext("a") as a, \
Adding a space makes the following a SyntaxError.
No silent error here.

>>>     FakeContext("b") as b:
>>>     pass
>>
>> Yes, of course, and that's the way I've done it. But it seems a pity to
>> do it this way when the documentation explicitly discourages the use of
>> the backslash for line continuation:
>> http://docs.python.org/py3k/howto/doanddont.html
>> (look at the very last item)

If no one uses \ for end of line escape, it should be removed ...
But I am not suggesting that.

> Which is actually factually incorrect and should be rewritten.  The only
> situation where stray whitespace after a backslash is valid syntax is
> within a string literal (and there, there is no alternative).
>
> So at least the "stray whitespace leads to silently buggy code" reason
> not to use backslashes is wrong.
>
> Georg
>


-- 
Terry Jan Reedy




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