Re: Weird behaviour?

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Date	Mon, 22 Apr 2013 10:56:11 +1000
Subject	Re: Weird behaviour?
From	Chris Angelico <rosuav@gmail.com>
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On Mon, Apr 22, 2013 at 10:37 AM,  <jussij@zeusedit.com> wrote:
> Can someone please explain the following behaviour?
>
> If I run the macro using the -u (flush buffers) option the if statement always fails:
>
>     C:\Temp>python.exe -u c:\temp\test.py
>     Please Input 120:
>     120
>     Value Inputed: 120
>     No

Here's the essence of your program:

print(repr(raw_input()))

You can use that to verify what's going on. Try running that with and
without the -u option; note, by the way, that -u actually means
"unbuffered", not "flush buffers".

You're running this under Windows. The convention on Windows is for
end-of-line to be signalled with \r\n, but the convention inside
Python is to use just \n. With the normal use of buffered and parsed
input, this is all handled for you; with unbuffered input, that
translation also seems to be disabled, so your string actually
contains '120\r', as will be revealed by its repr().

By the way, raw_input() already returns a string. There's no need to
str() it. :)

ChrisA

Thread

Weird behaviour? jussij@zeusedit.com - 2013-04-21 17:37 -0700
  Re: Weird behaviour? Chris Angelico <rosuav@gmail.com> - 2013-04-22 10:56 +1000
    Re: Weird behaviour? jussij@zeusedit.com - 2013-04-21 18:11 -0700
    Re: Weird behaviour? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-22 01:19 +0000
      Re: Weird behaviour? nn <pruebauno@latinmail.com> - 2013-04-22 07:29 -0700
        Re: Weird behaviour? jussij@zeusedit.com - 2013-04-22 16:06 -0700
          Re: Weird behaviour? Chris Angelico <rosuav@gmail.com> - 2013-04-23 10:04 +1000
        Re: Weird behaviour? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 00:31 +0000
  Re: Weird behaviour? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-22 01:05 +0000
    Re: Weird behaviour? jussij@zeusedit.com - 2013-04-21 18:14 -0700
    Re: Weird behaviour? Chris Angelico <rosuav@gmail.com> - 2013-04-22 11:13 +1000

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