Linebreaks and Indention

[Daniel Calvelo Aros]

On Wed, 24 Mar 2004 18:48:33 +0100, Martin Schulze wrote
> I noticed that python-mode *and* Python behave "a little bit" strange
> to linebreaks.
> 
> If I try to break a longer line inside python-mode
> 
>   foo_bar_baz = bar
> 
> auto-indention creates:
> 
>   foo_bar_baz = \
>               bar
> 
> which only saves two characters width, which is rediculous.
> 
> Do you want the second line indented by 4 characters or zero
> characters?  I.e.
> 
>   foo_bar_baz = \
>       bar
> 
> or
> 
>   foo_bar_baz = \
>   bar
> 
> The latter is created by python-mode/auto-indent if one splits the
> line without inserting a backslash at once.  Surprisingly Python
> will accept both.
> 
> Another question is how you prefer to break long lines with
> function/method calls like
> 
>   foo_bar_baz(baz_bar
> 
> Emacs python-mode/auto-indent automatically indents properly if
> split after an opening paranthesis:
> 
>   foo_bar_baz(
>       baz_bar
> 
> but not if split before the parentheis:
> 
>   foo_bar_baz
>   (baz_bar
> 
> Surprisingly Python will accept both.  But which one do you prefer?

In almost all cases, I try to indent by four spaces. 

Only exceptions are complicated expressions involving nested function calls,
where I try to indent each functions arguments according to the expression
structure, like:

outer_call(
            tricky_function(
                             arg_foo,
                             arg_baz = bar,
                             arg_bar
                            ),
            further_function(
                             with,
                             its,
                             own = args
                             )
            )

But that could as well be

outer_call(
    tricky_function(
        arg_foo,
        arg_baz = bar,
        arg_bar
    ),
    further_function(
        with,
        its,
        own = args
    )
)

And we are back to the always-four-space-indent rule.

Another interesting indentation layout is in generators, when they won't fit
in a line. I'd rather have:

[   very_long_expression
for var in seq 
if  condition ]

than

[ very_long_expression for
    var in seq if condition ]

if that's what autoindent generates.

BTW, opening brackets always at the end of the line. Old habit from the days
where python wouldn't accept multi-line expressions sans backslash except with
an unclosed bracket.

Just my taste of it. Are you trying to build consensus? Stuff like this should
be in the guidelines.

Daniel.

> Regards,
> 
> 	Joey
> 
> -- 
> Still can't talk about what I can't talk about.  Sorry.  -- Bruce Schneier
> 
> Please always Cc to me when replying to me on the lists.
> 
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-- Daniel Calvelo Aros
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