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Re: PyWart: The problem with "print"

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From Mark Lawrence <breamoreboy@yahoo.co.uk>
Subject Re: PyWart: The problem with "print"
Date Mon, 03 Jun 2013 09:49:40 +0100
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On 03/06/2013 04:10, Dan Sommers wrote:
> On Sun, 02 Jun 2013 20:16:21 -0400, Jason Swails wrote:
>
>> ... If you don't believe me, you've never hit a bug that 'magically'
>> disappears when you add a debugging print statement ;-).
>
> Ah, yes.  The Heisenbug.  ;-)
>
> We used to run into those back in the days of C and assembly language.
> They're much harder to see in the wild with Python.
>

Strikes me it's a bit like problems when prototyping circuit boards. 
The card doesn't work, so you mount it on an extender card, problem goes 
away, remove extender card, problem reappears.  Wash, rinse, repeat :)

-- 
"Steve is going for the pink ball - and for those of you who are 
watching in black and white, the pink is next to the green." Snooker 
commentator 'Whispering' Ted Lowe.

Mark Lawrence

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PyWart: The problem with "print" Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-02 10:04 -0700
  Re: PyWart: The problem with "print" Chris Angelico <rosuav@gmail.com> - 2013-06-03 03:20 +1000
    Re: PyWart: The problem with "print" Dan Sommers <dan@tombstonezero.net> - 2013-06-02 17:49 +0000
      Re: PyWart: The problem with "print" Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-02 11:18 -0700
        Re: PyWart: The problem with "print" Ned Batchelder <ned@nedbatchelder.com> - 2013-06-02 16:45 -0400
        Re: PyWart: The problem with "print" Michael Torrie <torriem@gmail.com> - 2013-06-02 23:49 -0600
        Re: PyWart: The problem with "print" Chris Angelico <rosuav@gmail.com> - 2013-06-03 17:17 +1000
          Re: PyWart: The problem with "print" Alister <alister.ware@ntlworld.com> - 2013-06-03 08:01 +0000
    Re: PyWart: The problem with "print" Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-02 11:09 -0700
      Re: PyWart: The problem with "print" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-02 19:03 +0000
      Re: PyWart: The problem with "print" Chris Angelico <rosuav@gmail.com> - 2013-06-03 06:21 +1000
      Re: PyWart: The problem with "print" jmfauth <wxjmfauth@gmail.com> - 2013-06-04 05:23 -0700
        Re: PyWart: The problem with "print" rusi <rustompmody@gmail.com> - 2013-06-04 06:29 -0700
          Re: PyWart: The problem with "print" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-06-04 14:35 +0100
        Re: PyWart: The problem with "print" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-05 05:03 +0000
  Re: PyWart: The problem with "print" Andrew Berg <robotsondrugs@gmail.com> - 2013-06-02 12:30 -0500
  Re: PyWart: The problem with "print" Chris Angelico <rosuav@gmail.com> - 2013-06-03 03:34 +1000
  Re: PyWart: The problem with "print" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-02 18:58 +0000
    Re: PyWart: The problem with "print" Chris Angelico <rosuav@gmail.com> - 2013-06-03 06:28 +1000
    Re: PyWart: The problem with "print" Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-03 18:37 -0700
      Re: PyWart: The problem with "print" Vito De Tullio <vito.detullio@gmail.com> - 2013-06-04 05:16 +0200
        Re: PyWart: The problem with "print" Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-03 20:53 -0700
        Re: PyWart: The problem with "print" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-04 04:30 +0000
      Bools and explicitness [was Re: PyWart: The problem with "print"] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-04 05:39 +0000
        Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-04 08:44 -0700
          Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-05 02:00 +1000
            Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-04 09:19 -0700
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-05 02:27 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-05 05:28 +0000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] alex23 <wuwei23@gmail.com> - 2013-06-04 22:31 -0700
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Ned Batchelder <ned@nedbatchelder.com> - 2013-06-04 13:25 -0400
          Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-04 09:09 -0700
            Re: Bools and explicitness [was Re: PyWart: The problem with "print"] alex23 <wuwei23@gmail.com> - 2013-06-04 18:31 -0700
          Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Fábio Santos <fabiosantosart@gmail.com> - 2013-06-04 17:10 +0100
          Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Jason Swails <jason.swails@gmail.com> - 2013-06-04 13:32 -0400
          Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-04 11:42 -0600
            Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-04 16:21 -0700
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-06-05 00:37 +0100
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Michael Torrie <torriem@gmail.com> - 2013-06-04 23:28 -0600
          Re: Bools and explicitness [was Re: PyWart: The problem with "print"] "Russ P." <Russ.Paielli@gmail.com> - 2013-06-04 23:11 -0700
            Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-05 17:15 +1000
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] "Russ P." <Russ.Paielli@gmail.com> - 2013-06-05 00:47 -0700
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-06 09:49 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-07 02:59 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Dan Stromberg <drsalists@gmail.com> - 2013-06-06 18:26 -0700
            Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-06-05 09:59 +0100
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] "Russ P." <Russ.Paielli@gmail.com> - 2013-06-05 09:15 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-06 02:59 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] "Russ P." <Russ.Paielli@gmail.com> - 2013-06-05 14:59 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-06 01:56 +0000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-06 12:29 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] "Russ P." <Russ.Paielli@gmail.com> - 2013-06-05 21:25 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-06 00:06 -0600
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-06 09:29 +0000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-06 19:45 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Serhiy Storchaka <storchaka@gmail.com> - 2013-06-06 14:12 +0300
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Robert Kern <robert.kern@gmail.com> - 2013-06-06 16:35 +0100
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-07 01:41 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Robert Kern <robert.kern@gmail.com> - 2013-06-06 17:08 +0100
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] rusi <rustompmody@gmail.com> - 2013-06-06 10:27 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Devin Jeanpierre <jeanpierreda@gmail.com> - 2013-06-06 14:44 -0400
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Mark Janssen <dreamingforward@gmail.com> - 2013-06-06 10:59 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] alex23 <wuwei23@gmail.com> - 2013-06-06 17:53 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Mark Janssen <dreamingforward@gmail.com> - 2013-06-06 18:44 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] alex23 <wuwei23@gmail.com> - 2013-06-06 19:03 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Mark Janssen <dreamingforward@gmail.com> - 2013-06-06 22:01 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-07 02:29 +0000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Mark Janssen <dreamingforward@gmail.com> - 2013-06-06 20:14 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] rusi <rustompmody@gmail.com> - 2013-06-06 20:24 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Mark Janssen <dreamingforward@gmail.com> - 2013-06-06 20:30 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] rusi <rustompmody@gmail.com> - 2013-06-06 20:43 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] "Russ P." <Russ.Paielli@gmail.com> - 2013-06-06 11:08 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-06 08:49 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-07 02:00 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Grant Edwards <invalid@invalid.invalid> - 2013-06-06 17:32 +0000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-06 01:37 +0000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-06 11:45 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] rusi <rustompmody@gmail.com> - 2013-06-06 07:09 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-07 01:26 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] rusi <rustompmody@gmail.com> - 2013-06-06 08:36 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Chris Angelico <rosuav@gmail.com> - 2013-06-07 01:46 +1000
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-06 11:03 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-06 11:11 -0700
            Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Terry Jan Reedy <tjreedy@udel.edu> - 2013-06-05 12:10 -0400
            Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Michael Torrie <torriem@gmail.com> - 2013-06-05 17:18 -0600
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] "Russ P." <Russ.Paielli@gmail.com> - 2013-06-05 16:52 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Michael Torrie <torriem@gmail.com> - 2013-06-05 19:20 -0600
              Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Rick Johnson <rantingrickjohnson@gmail.com> - 2013-06-06 09:24 -0700
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] Devin Jeanpierre <jeanpierreda@gmail.com> - 2013-06-06 12:39 -0400
                Re: Bools and explicitness [was Re: PyWart: The problem with "print"] alex23 <wuwei23@gmail.com> - 2013-06-06 17:55 -0700
      Re: PyWart: The problem with "print" Chris Angelico <rosuav@gmail.com> - 2013-06-04 17:30 +1000
  Re: PyWart: The problem with "print" Jason Swails <jason.swails@gmail.com> - 2013-06-02 20:16 -0400
    Re: PyWart: The problem with "print" Dan Sommers <dan@tombstonezero.net> - 2013-06-03 03:10 +0000
      Re: PyWart: The problem with "print" Jason Swails <jason.swails@gmail.com> - 2013-06-02 23:23 -0400
        Re: PyWart: The problem with "print" Dan Sommers <dan@tombstonezero.net> - 2013-06-03 04:20 +0000
          Re: PyWart: The problem with "print" Robert Kern <robert.kern@gmail.com> - 2013-06-03 11:52 +0100
      Re: PyWart: The problem with "print" Tim Delaney <timothy.c.delaney@gmail.com> - 2013-06-03 13:37 +1000
        Python Heisenbugs?  (was: Re: PyWart: The problem with "print") Dan Sommers <dan@tombstonezero.net> - 2013-06-03 04:34 +0000
          Re: Python Heisenbugs? (was: Re: PyWart: The problem with "print") Chris Angelico <rosuav@gmail.com> - 2013-06-03 15:05 +1000
          Re: Python Heisenbugs? (was: Re: PyWart: The problem with "print") Devin Jeanpierre <jeanpierreda@gmail.com> - 2013-06-03 03:06 -0400
      Re: PyWart: The problem with "print" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-06-03 09:49 +0100
      Re: PyWart: The problem with "print" Dave Angel <davea@davea.name> - 2013-06-03 08:56 -0400
  Re: PyWart: The problem with "print" Chris Angelico <rosuav@gmail.com> - 2013-06-03 12:02 +1000
  Re: PyWart: The problem with "print" Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-03 11:12 -0600
  Re: PyWart: The problem with "print" Jason Swails <jason.swails@gmail.com> - 2013-06-03 15:09 -0400
    Re: PyWart: The problem with "print" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-03 20:31 +0000
      Re: PyWart: The problem with "print" Chris Angelico <rosuav@gmail.com> - 2013-06-04 06:44 +1000
  Re: PyWart: The problem with "print" Jason Swails <jason.swails@gmail.com> - 2013-06-03 15:10 -0400
  Re: PyWart: The problem with "print" Jason Swails <jason.swails@gmail.com> - 2013-06-03 15:11 -0400

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