Making string-formatting smarter by handling generators?

[Arnaud Delobelle]

On Feb 27, 5:25 pm, "D'Arcy J.M. Cain" <da... at druid.net> wrote:
> On Wed, 27 Feb 2008 10:23:49 -0600
>
> Tim Chase <python.l... at tim.thechases.com> wrote:
>
> >    "%s=%s&%s=%s" % map(urllib.quote, params)
>
> Isn't map() deprecated?  The above can be done with;
>
>     "%s=%s&%s=%s" % tuple([urllib.quote(x) for x in params])

I don't think that map() is deprecated.  In python 3.0 it is still
present, only it returns an iterator instead of a list.

In this case

    map(urllib.quote, params)

looks for urlib.quote exactly once altogether.  Whereas

    [urllib.quote(x) for x in params]

looks for urlib.quote once for every element in params.  (Of course in
the example given params only has 4 elements so it doesn't matter).

--
Arnaud