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Groups > comp.lang.python > #28318

Re: newbie ``print`` question

From Terry Reedy <tjreedy@udel.edu>
Subject Re: newbie ``print`` question
Date 2012-09-02 16:49 -0400
References <c9b2c268-fcc4-40f7-8769-517c13683894@v9g2000pbu.googlegroups.com> <mailman.96.1346608542.27098.python-list@python.org> <c989c63e-59da-410a-a89c-fcfccf92e8e3@q9g2000pbo.googlegroups.com>
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On 9/2/2012 3:26 PM, gwhite wrote:

> On the "rework" thing, yes, I suppose I could construct the line as a
> single string prior to print.    There would be things like `for`
> loops and conditionals to do so.  That isn't so unusual.

The usual idiom is to construct a list of pieces and then join with ''.

 >>> print(''.join(['1', '2']))
12

Or map str to a list of objects.

 >>> print(''.join(map(str, [1, 2])))
12

You can do either of these in 2.x.
If you use .write, include '\n' at the end of the list (when needed).

Print was designed as a quick and easy way to put lines of text on the 
screen. Then people asked for a way to use with with other streams, 
hence the >> hack. Then people wanted ways to control the separator and 
terminator. As that point, Guido realized that it needed to be a 
function, not a statement, with all the options requested.

-- 
Terry Jan Reedy

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Thread

newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 10:23 -0700
  Re: newbie ``print`` question Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-02 18:41 +0100
  Re: newbie ``print`` question Joel Goldstick <joel.goldstick@gmail.com> - 2012-09-02 13:44 -0400
    Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 12:46 -0700
  Re: newbie ``print`` question mblume <foobar@invalid.invalid> - 2012-09-02 17:49 +0000
    Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 11:51 -0700
  Re: newbie ``print`` question Chris Rebert <clp2@rebertia.com> - 2012-09-02 10:55 -0700
    Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 11:51 -0700
    Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 12:26 -0700
      Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 12:34 -0700
        Re: newbie ``print`` question Dave Angel <d@davea.name> - 2012-09-02 15:41 -0400
          Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 12:50 -0700
            Re: newbie ``print`` question Dave Angel <d@davea.name> - 2012-09-02 16:15 -0400
              Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 13:58 -0700
                Re: newbie ``print`` question MRAB <python@mrabarnett.plus.com> - 2012-09-02 23:43 +0100
                Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 16:33 -0700
                Re: newbie ``print`` question MRAB <python@mrabarnett.plus.com> - 2012-09-03 01:12 +0100
      Re: newbie ``print`` question Terry Reedy <tjreedy@udel.edu> - 2012-09-02 16:49 -0400
        Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 14:18 -0700
          Re: newbie ``print`` question Chris Angelico <rosuav@gmail.com> - 2012-09-03 07:47 +1000
            Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 16:20 -0700
              Re: newbie ``print`` question Chris Angelico <rosuav@gmail.com> - 2012-09-03 09:28 +1000
  Re: newbie ``print`` question Terry Reedy <tjreedy@udel.edu> - 2012-09-02 14:33 -0400
    Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 12:18 -0700
  Re: newbie ``print`` question Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-09-02 16:37 -0400
    Re: newbie ``print`` question gwhite <gwhite@ti.com> - 2012-09-02 14:04 -0700

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