On May 27, 5:22 am, HH <henri...@gmail.com> wrote:
> I have a question about best practices when it comes to line wrapping/
> continuation and indentation, specifically in the case of an if
> statement.
>
> When I write an if statement with many conditions, I prefer to use a
> parenthesis around the whole block and get the implicit continuation,
> rather than ending each line with an escape character. Thus, using
> the example from the style guide (http://www.python.org/dev/peps/
> pep-0008/) I would write:
>
> if (width == 0 and
> height == 0 and
> color == 'red' and
> emphasis == 'strong' or
> highlight > 100):
> raise ValueError("sorry, you lose")
>
> The problem should be obvious -- it's not easy to see where the
> conditional ends and the statement begins since they have the same
> indentation. Part of the problem, I suppose, is that Emacs indents
> 'height' and the other lines in the conditional to 4 spaces (because
> of the parenthesis). How do people deal with this situation?
>
> Thanks,
> Henrik
To show another alternative, I like:
if (width == 0
and height == 0
and color == 'red'
and emphasis == 'strong'
or highlight > 100):
raise ValueError("sorry, you lose")
This works because and/or can not start an expression, so it is
obvious
that they continue the expression from the previous line. If I run
out
of room to put a full and/or clause on one line, then I'll indent the
subclause two levels.
-- Greg
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