[Python-Dev] New string method - splitquoted

[Guido van Rossum]

"I'm sorry Dave, I'm afraid I can't do that."

We hear you, Dave, but this is not a suitable function to add to the
standard library. Many respondents are trying to tell you that in many
different ways. If you keep arguing for it, we'll just ignore you.

--Guido

PS. Give up TDMA. Try Spambayes instead. It works much better and is
less annoying for your correspondents.

On 5/18/06, Dave Cinege
<dcinegemlists2-dated-1148418122.b868e0 at psychosis.com> wrote:
> On Thursday 18 May 2006 16:13, you wrote:
> > Dave Cinege wrote:
> > > For example:
> > >
> > > s = '      Chan: 11  SNR: 22  ESSID: "Spaced Out Wifi"  Enc: On'
> >
> > My complaint with this example is that you are just using the wrong tool
> > to do this job. If I was going to do this, I would've immediately jumped
> > on the regex-press train.
> >
> > wifi_info = re.match('^\s+'
> >                       'Chan:\s+(?P<channel>[0-9]+)\s+'
> >                       'SNR:\s+(?P<snr>[0-9]+)\s+'
> >                       'ESSID:\s+"(?P<essid>[^"]*)"\s+'
> >                       'Enc:\s+(?P<encryption>[a-zA-Z]+)'
> >                       , s)
>
> For the 5 years of been pythoning, I've used re probably twice.
> I find regex to be a tool of last resort, and quite a bit of effort to get
> right, as regex (for me) is quite prone it giving unintended results without
> a good deal of thought. I don't want to have to think. That's why I use
> python.  : )
>
> .split() and slicing has always been python's holy grail for me, and I find it
> a lot easier to .replace() 'stray' chars with spaces or a delimiter and then
> split() that.  It's easier to read and (should be) a lot quicker to process
> then regex. (Which I care about, as I'm also often on embedded CPU's of a few
> hundred MHz)
>
> So .split works just super duper.....but I keep running in to situations where
> I'd like a substr to be excluded from the split'ing.
>
> The clearest one is excluding a 'quoted' string that has whitespace.
> Here's another, be it, a very poor example:
>
> s = '\t\tFrequency:2.462 GHz (Channel 11)'      # This is real output from iwlist:
> s.replace(':',')').replace(' (','))').split(None,-1,')')
> ['Frequency', '2.462 GHz', 'Channel 11']
>
> I wanted to preserve the '2.462 GHz' substr. Let's assume, that could come out
> as '900 MHz' or '11.3409 GHz'. The above code gets what I want in 1 shot,
> either way. Show me an easier way, that doesn't need multiple splits, and
> string re-assembly, ....and I'll use it.
>
> Dave
>
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-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)