Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #105963

Re: repeat items in a list

Show all headers | View raw

On Monday, March 28, 2016 at 11:26:08 PM UTC+2, Chris Angelico wrote:
> On Tue, Mar 29, 2016 at 4:30 AM, Rob Gaddi
> <rgaddi@highlandtechnology.invalid> wrote:
> > beliavsky@aol.com wrote:
> >
> >> On Saturday, March 26, 2016 at 7:24:10 PM UTC-4, Erik wrote:
> >>>
> >>> Or, if you want to "import operator" first, you can use 'operator.add'
> >>> instead of the lambda (but you _did_ ask for a one-liner ;)).
> >>>
> >>> Out of interest, why the fascination with one-liners?
> >>
> >> Thanks for your reply. Sometimes when I program in Python I think I am not using the full capabilities of the language, so I want to know if there are
> >> more concise ways of doing things.
> >
> > Concise is only worth so much.  PEP20 tells us "Explicit is better than
> > implicit", "Simple is better than complex" and "If the implementation is
> > hard to explain, it's a bad idea".
> >
> > Python is a beautifully expressive language.  Your goal should not be to
> > write the minimum number of lines of code to accomplish the task.
> > Your goal should be to write the code such that your grandmother can
> > understand it.  That way, when you screw it up, you'll be able to easily
> > figure out where and how you did so.  Or failing that, you can get
> > grangran to show you.
> 
> Just out of interest, did you (generic you) happen to notice Mark's
> suggestion? It's a one-liner that nicely expresses the intention and
> accomplishes the goal:
> 
> yy = [aa for aa in xx for _ in range(nrep)]
> 
> It quietly went through without fanfare, but I would say this is the
> perfect solution to the original problem.
> 
> ChrisA

Of course that's definitely the most pythonic sol to this prob :)! Just wanted to point out the use of the operator "*" in lists.

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

repeat items in a list beliavsky@aol.com - 2016-03-26 15:12 -0700
  Re: repeat items in a list Cameron Simpson <cs@zip.com.au> - 2016-03-27 10:05 +1100
  Re: repeat items in a list Erik <python@lucidity.plus.com> - 2016-03-26 23:23 +0000
    Re: repeat items in a list beliavsky@aol.com - 2016-03-26 16:36 -0700
      Re: repeat items in a list Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2016-03-28 17:30 +0000
        Re: repeat items in a list Chris Angelico <rosuav@gmail.com> - 2016-03-29 08:25 +1100
          Re: repeat items in a list Antonio Caminero Garcia <tonycamgar@gmail.com> - 2016-03-29 01:43 -0700
        Re: repeat items in a list Erik <python@lucidity.plus.com> - 2016-03-28 23:14 +0100
  Re: repeat items in a list Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-26 23:28 +0000
    Re: repeat items in a list beliavsky@aol.com - 2016-03-26 16:54 -0700
      Re: repeat items in a list Paul Rubin <no.email@nospam.invalid> - 2016-03-26 22:35 -0700
  Re: repeat items in a list Antonio Caminero Garcia <tonycamgar@gmail.com> - 2016-03-27 01:02 -0700
    Re: repeat items in a list Antonio Caminero Garcia <tonycamgar@gmail.com> - 2016-03-27 01:30 -0700
    Re: repeat items in a list Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-03-27 14:09 +0300
  Re: repeat items in a list larudwer <larudwer@freenet.de> - 2016-03-27 11:52 +0200
    Re: repeat items in a list Antonio Caminero Garcia <tonycamgar@gmail.com> - 2016-03-27 04:13 -0700
      Re: repeat items in a list larudwer <larudwer@freenet.de> - 2016-03-28 13:36 +0200
        Re: repeat items in a list Random832 <random832@fastmail.com> - 2016-03-28 10:04 -0400
        Re: repeat items in a list Vito De Tullio <vito.detullio@gmail.com> - 2016-03-29 23:25 +0200
        Re: repeat items in a list Michael Selik <michael.selik@gmail.com> - 2016-03-29 22:05 +0000
        Re: repeat items in a list Peter Otten <__peter__@web.de> - 2016-03-30 17:52 +0200

csiph-web