the annoying, verbose self

[BJörn Lindqvist]

On Nov 23, 2007 11:54 PM, Steven D'Aprano
<steve at remove-this-cybersource.com.au> wrote:
> On Fri, 23 Nov 2007 23:38:24 +0000, BJörn Lindqvist
> wrote:
>
> > I like that a lot. This saves 12 characters for the original example and
> > removes the need to wrap it.
> >
> > 7            return math.sqrt(.x * .x + .y * .y + .z * .z)
> >
> > +1 Readability counts, even on small screens.
[gibberish]
> which to my eyes has too much whitespace, but the alternative is worse:
> math.sqrt(.x*.x + .y*.y + .z*.z)

This is merely your personal preference and as such, it is not
possible to argue or put in absolute terms.

> and this is positively painful to try to read, it looks like line-noise:
> math.sqrt(.x*.x+.y*.y+.z*.z)

At least it is 12 characters less line-noise than
math.sqrt(self.x*self.y+self.y*self.y+self.z*self.z).

> The correct solution to your example is to get rid of the attribute
> lookups from the expression completely:

No it is not. The "solution" is nothing more than a silly band-aid
thrown out by people who cannot comprehend that Python may not be
perfect in every little detail.

> def abs(self):
>     x, y, z = self.x, self.y, self.z
>     return math.sqrt(x**2 + y**2 + z**2)
>
>
> It's probably also faster, because it looks up the attributes only once
> each, instead of twice.

timeit


-- 
mvh Björn