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Re: An error when i switched from python v2.6.6 => v3.2.3

References <8e17232e-5b24-4040-9215-c4bd89f34fa2@googlegroups.com> <622d4a2d-0014-4254-b211-c8fd66510f74@googlegroups.com> <c2a09443-3c74-477b-af9f-a6f3473ebe88@googlegroups.com>
Date 2013-03-08 02:13 +1100
Subject Re: An error when i switched from python v2.6.6 => v3.2.3
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.3029.1362669207.2939.python-list@python.org> (permalink)

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On Fri, Mar 8, 2013 at 2:01 AM, Νίκος Γκρ33κ <nikos.gr33k@gmail.com> wrote:
> os.system( 'python metrites.py > %s' ) % htmltemp

Manually step through what this line should do. Follow the exact same
rules Python will follow in evaluating this expression.

http://docs.python.org/2/reference/expressions.html#operator-precedence
http://docs.python.org/3/reference/expressions.html#operator-precedence

As you'll see from footnote 8 or 5 (depending on which version of the
docs), your percent operator is the same one listed in the table as a
division operator.

Now. Go through that expression, step by step. Walk through everything
the Python interpreter does. Figure out exactly what happens first,
second, third. Figure out when your percent operator gets handled.
Then you'll know what's wrong with that line of code.

You'll also gain a very useful understanding of Python, and more
generally of the way most high level languages parse expressions.

ChrisA

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An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 00:18 -0800
  Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 01:06 -0800
    Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 03:27 -0800
      Re: An error when i switched from python v2.6.6 => v3.2.3 "Michael Ross" <gmx@ross.cx> - 2013-03-07 12:51 +0100
        Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 04:25 -0800
          Re: An error when i switched from python v2.6.6 => v3.2.3 "Michael Ross" <gmx@ross.cx> - 2013-03-07 14:06 +0100
            Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 05:22 -0800
              Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 00:43 +1100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 05:56 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 01:01 +1100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:11 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:13 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 01:17 +1100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:34 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 01:37 +1100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:44 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 01:48 +1100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:44 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:34 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:13 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 01:16 +1100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:11 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 05:56 -0800
            Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 05:22 -0800
        Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 04:25 -0800
  Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:50 -0800
    Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 06:52 -0800
    Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 07:01 -0800
      Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 02:13 +1100
        Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 07:26 -0800
          Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 02:33 +1100
            Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 07:57 -0800
              Re: An error when i switched from python v2.6.6 => v3.2.3 rh <richard_hubbe11@lavabit.com> - 2013-03-07 10:51 -0800
              Re: An error when i switched from python v2.6.6 => v3.2.3 Joel Goldstick <joel.goldstick@gmail.com> - 2013-03-07 13:57 -0500
              Re: An error when i switched from python v2.6.6 => v3.2.3 Joel Goldstick <joel.goldstick@gmail.com> - 2013-03-07 14:36 -0500
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 12:04 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Ian Kelly <ian.g.kelly@gmail.com> - 2013-03-07 13:15 -0700
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 16:57 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Vito De Tullio <vito.detullio@gmail.com> - 2013-03-08 04:55 +0100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 22:54 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 22:54 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 22:56 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-08 18:01 +1100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 02:51 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 02:51 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 22:56 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-03-08 18:54 +0000
                Re: An error when i switched from python v2.6.6 => v3.2.3 info@cravendot.gr - 2013-03-08 11:19 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Ian Kelly <ian.g.kelly@gmail.com> - 2013-03-08 13:01 -0700
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 12:31 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Chris Angelico <rosuav@gmail.com> - 2013-03-09 08:37 +1100
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 19:18 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-03-09 03:27 +0000
                Re: An error when i switched from python v2.6.6 => v3.2.3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-03-09 05:05 +0000
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 23:56 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-03-09 12:43 +0000
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-09 06:16 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-09 06:16 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 rusi <rustompmody@gmail.com> - 2013-03-09 07:20 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 19:18 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Ian Kelly <ian.g.kelly@gmail.com> - 2013-03-08 17:26 -0700
                Re: An error when i switched from python v2.6.6 => v3.2.3 nagia.retsina@gmail.com - 2013-03-08 19:15 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 nagia.retsina@gmail.com - 2013-03-08 19:15 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 12:31 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Ian Kelly <ian.g.kelly@gmail.com> - 2013-03-08 13:04 -0700
                Re: An error when i switched from python v2.6.6 => v3.2.3 nagia.retsina@gmail.com - 2013-03-08 12:54 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 emile <emile@fenx.com> - 2013-03-08 14:13 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Ian Kelly <ian.g.kelly@gmail.com> - 2013-03-08 17:18 -0700
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 19:17 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-03-09 03:33 +0000
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-08 19:17 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 16:57 -0800
                Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 12:04 -0800
            Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 07:57 -0800
        Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 07:26 -0800
      Re: An error when i switched from python v2.6.6 => v3.2.3 John Gordon <gordon@panix.com> - 2013-03-07 15:55 +0000
        Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 08:00 -0800
          Re: An error when i switched from python v2.6.6 => v3.2.3 Νίκος Γκρ33κ <nikos.gr33k@gmail.com> - 2013-03-07 08:22 -0800
            Re: An error when i switched from python v2.6.6 => v3.2.3 Joel Goldstick <joel.goldstick@gmail.com> - 2013-03-07 12:41 -0500
            Re: An error when i switched from python v2.6.6 => v3.2.3 Joel Goldstick <joel.goldstick@gmail.com> - 2013-03-07 13:50 -0500

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