Re: Beginner question

Date	2013-06-04 13:16 -0400
From	Mitya Sirenef <msirenef@lightbird.net>
Subject	Re: Beginner question
References	<CAA=1kxQFcMgSJ2_eD00B35V31WpbFiQ6LR=oBzrigg=8QoafCA@mail.gmail.com> <BLU176-W328C47391F61A540801441D79E0@phx.gbl>
Newsgroups	comp.lang.python
Message-ID	<mailman.2667.1370366201.3114.python-list@python.org> (permalink)

Show all headers | View raw

On 06/04/2013 07:53 AM, Carlos Nepomuceno wrote:
> >On 4 Jun 2013 12:28,  "Carlos Nepomuceno" <carlosnepomuceno@outlook.com> wrote:
 > [...]
 > >> What's going on? Is there a way to make dict() to resolve the 
variables?
 > >Well yes.
 > >dict(**{a:0,b:1})
 > >The dict() constructor makes a dictionary from keyword arguments. So 
you just have to feed it keyword arguments using **.
 > >And if you're in a bad day,
 > >dict(**locals())
 >
 > That's exactly the same!
 > >>>dict(**{a:0,b:1})=={a:0,b:1}
 > True
 >
 > Are there any benefits from using dict() instead of {}?
 >


Other than what Steven already mentioned, a big advantage is that it's
easier to make a dict if you have a lot of keys that are valid
identifiers, and it's more readable, to boot:

dict(red=1, blue=2, orange=3, violet=4, crimson=5, ...)

VS.

{'red':1, 'blue':2, 'orange':3, 'violet':4, 'crimson':5, ...}

  -m


-- 
Lark's Tongue Guide to Python: http://lightbird.net/larks/

Although the most acute judges of the witches and even the witches
themselves, were convinced of the guilt of witchery, the guilt nevertheless
was non-existent. It is thus with all guilt.  Friedrich Nietzsche

Thread

Beginner question eschneider92@comcast.net - 2013-06-03 20:39 -0700
  RE: Beginner question Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-06-04 09:46 +0300
    Re: Beginner question John Ladasky <john_ladasky@sbcglobal.net> - 2013-06-04 00:53 -0700
      RE: Beginner question Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-06-04 11:17 +0300
  Re: Beginner question Anssi Saari <as@sci.fi> - 2013-06-04 10:45 +0300
    Re: Beginner question John Ladasky <john_ladasky@sbcglobal.net> - 2013-06-04 00:57 -0700
      Re: Beginner question Chris Angelico <rosuav@gmail.com> - 2013-06-04 18:24 +1000
      Re: Beginner question Peter Otten <__peter__@web.de> - 2013-06-04 11:23 +0200
      RE: Beginner question Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-06-04 14:23 +0300
        Re: Beginner question Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-04 12:35 +0000
          RE: Beginner question Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-06-04 15:51 +0300
            Re: Beginner question Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-07 02:21 +0000
      RE: Beginner question Fábio Santos <fabiosantosart@gmail.com> - 2013-06-04 12:34 +0100
      RE: Beginner question Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-06-04 14:53 +0300
        Re: Beginner question Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-04 12:25 +0000
          RE: Beginner question Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-06-04 15:37 +0300
          RE: Beginner question Fábio Santos <fabiosantosart@gmail.com> - 2013-06-04 13:47 +0100
      RE: Beginner question Fábio Santos <fabiosantosart@gmail.com> - 2013-06-04 13:15 +0100
      Re: Beginner question Mitya Sirenef <msirenef@lightbird.net> - 2013-06-04 13:16 -0400
  Re: Beginner question Larry Hudson <orgnut@yahoo.com> - 2013-06-04 02:13 -0700
    Re: Beginner question Roy Smith <roy@panix.com> - 2013-06-04 09:16 -0400
  Re: Beginner question Joshua Landau <joshua.landau.ws@gmail.com> - 2013-06-04 20:43 +0100
  Re: Beginner question eschneider92@comcast.net - 2013-06-05 20:42 -0700

csiph-web