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Groups > comp.lang.python > #53356

Re: print function and unwanted trailing space

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candide wrote:

> Le 31/08/2013 12:31, Peter Otten a écrit :
>  > softspace = False
>  > for i in range(5):
>  >      if softspace:
>  >          print(end=" ")
>  >      print(i, end="")
>  >      softspace = True
>  > print()
> 
> 
> The if instruction imposes useless testing (we know in advance the
> problem to occur at the very end of the loop) and useless writing
> (writing '').

To make it crystal clear, the above was to illustrate the algorithm used in 
Python 2, not a suggestion. Python 2 uses that "useless testing" -- which is 
cheap compared to actual I/O.

> The following is clearer
> 
> # -------------------------
> n=5
> for i in range(n-1):
>      print(i, end=' ')
> print(n-1)
> # -------------------------
> 
> 
> but doesn't solve all the cases (imagine a string or an iterator).

I still think you should live with a trailing space or go with my actual 
suggestion

print(*range(5))

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print function and unwanted trailing space candide <candide@free.invalid> - 2013-08-31 10:17 +0200
  Re: print function and unwanted trailing space Andreas Perstinger <andipersti@gmail.com> - 2013-08-31 10:43 +0200
    Re: print function and unwanted trailing space candide <candide@free.invalid> - 2013-08-31 11:25 +0200
      Re: print function and unwanted trailing space Peter Otten <__peter__@web.de> - 2013-08-31 12:31 +0200
        Re: print function and unwanted trailing space candide <candide@free.invalid> - 2013-08-31 15:33 +0200
          Re: print function and unwanted trailing space Peter Otten <__peter__@web.de> - 2013-08-31 15:59 +0200
            Re: print function and unwanted trailing space candide <candide@free.invalid> - 2013-08-31 17:58 +0200
          Re: print function and unwanted trailing space Chris Angelico <rosuav@gmail.com> - 2013-09-01 01:30 +1000
          Re: print function and unwanted trailing space Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-08-31 16:43 +0100
          Re: print function and unwanted trailing space Chris Angelico <rosuav@gmail.com> - 2013-09-01 08:08 +1000
          Re: print function and unwanted trailing space Joshua Landau <joshua@landau.ws> - 2013-09-01 00:15 +0100
          Re: print function and unwanted trailing space Terry Reedy <tjreedy@udel.edu> - 2013-08-31 19:57 -0400
        Re: print function and unwanted trailing space candide <candide@free.invalid> - 2013-08-31 17:51 +0200
  Re: print function and unwanted trailing space Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-08-31 11:16 +0000
    Re: print function and unwanted trailing space Peter Otten <__peter__@web.de> - 2013-08-31 14:27 +0200
    Re: print function and unwanted trailing space Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-08-31 13:37 +0100
    Re: print function and unwanted trailing space candide <candide@free.invalid> - 2013-08-31 14:59 +0200
      Re: print function and unwanted trailing space Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-08-31 15:18 +0000
  Re: print function and unwanted trailing space Ned Batchelder <ned@nedbatchelder.com> - 2013-08-31 07:24 -0400
    Re: print function and unwanted trailing space candide <candide@free.invalid> - 2013-08-31 15:51 +0200
  Re: print function and unwanted trailing space Wayne Werner <wayne@waynewerner.com> - 2013-09-11 06:36 -0500
  Re: print function and unwanted trailing space Albert Hopkins <marduk@letterboxes.org> - 2013-09-12 15:25 -0400

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