allow line break at operators
steve+comp.lang.python at pearwood.info
Thu Aug 11 01:32:12 CEST 2011
Ian Kelly wrote:
> On Wed, Aug 10, 2011 at 8:37 AM, Steven D'Aprano
> <steve+comp.lang.python at pearwood.info> wrote:
>>> Without the parentheses, this is legal but (probably) useless; it
>>> applies the unary + operator to the return value of those functions.
>>> Putting the + at the end of the previous line at least prevents that,
>>> since most unary operators bind to the operand on the right;
>> Not so:
>>>>> x = (42 + -
>> ... 100)
> That is still binding to the operand on the "right" (i.e., the
> sequentially later). And it still does not cause the problem that
> Chris was talking about, since without the parentheses that would be a
> syntax error. So I guess I'm not certain what exactly it is that
> you're trying to demonstrate here.
Chris stated that putting the unary + at the end of the line
prevents "that", that being applying the unary + operator to the value on
the right. But that is not the case -- unary prefix operators in Python can
be separated from their operands by whitespace, including newlines.
(Python doesn't have any unary postfix operators.)
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