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Groups > comp.lang.python > #19020

Re: Problem while doing a cat on a tabbed file with pexpect

Date 2012-01-16 10:40 +1100
From Cameron Simpson <cs@zip.com.au>
Subject Re: Problem while doing a cat on a tabbed file with pexpect
References <4f135b65$0$29987$c3e8da3$5496439d@news.astraweb.com>
Newsgroups comp.lang.python
Message-ID <mailman.4781.1326670827.27778.python-list@python.org> (permalink)

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On 15Jan2012 23:04, Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote:
| On Sun, 15 Jan 2012 09:51:44 -0800, Saqib Ali wrote:
| > I am using Solaris 10, python 2.6.2, pexpect 2.4
| > 
| > I create a file called me.txt which contains the letters "A", "B", "C"
| > on the same line separated by tabs.
| [...]
| > Now, clearly the file contains tabs.
| 
| That is not clear at all. How do you know it contains tabs? How was the 
| file created in the first place?
| 
| Try this:
| 
| text = open('me.txt', 'r').read()
| print '\t' in text
| 
| My guess is that it will print False and that the file does not contain 
| tabs. Check your editor used to create the file.

I was going to post an alternative theory but on more thought I think
Steven is right here.

What does:

  od -c me.txt

show you? TABs or multiple spaces?

What does:

  ls -ld me.txt

tell you about the file size? Is it 6 bytes long (three letters, two
TABs, one newline)?

Steven hasn't been explicit about it, but some editors will write spaces when
you type a TAB. I have configured mine to do so - it makes indentation more
reliable for others. If I really need a TAB character I have a special
finger contortion to get one, but the actual need is rare.

So first check that the file really does contain TABs.

Cheers,
-- 
Cameron Simpson <cs@zip.com.au> DoD#743
http://www.cskk.ezoshosting.com/cs/

Yes Officer, yes Officer, I will Officer. Thank you.

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Thread

Problem while doing a cat on a tabbed file with pexpect Saqib Ali <saqib.ali.75@gmail.com> - 2012-01-15 09:51 -0800
  Re: Problem while doing a cat on a tabbed file with pexpect Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-01-15 14:24 -0500
    Re: Problem while doing a cat on a tabbed file with pexpect Saqib Ali <saqib.ali.75@gmail.com> - 2012-01-15 16:11 -0800
      Re: Problem while doing a cat on a tabbed file with pexpect Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-01-15 22:35 -0500
      Re: Problem while doing a cat on a tabbed file with pexpect Michael Torrie <torriem@gmail.com> - 2012-01-15 20:47 -0700
  Re: Problem while doing a cat on a tabbed file with pexpect Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-01-15 23:04 +0000
    Re: Problem while doing a cat on a tabbed file with pexpect Cameron Simpson <cs@zip.com.au> - 2012-01-16 10:40 +1100
      Re: Problem while doing a cat on a tabbed file with pexpect Saqib Ali <saqib.ali.75@gmail.com> - 2012-01-15 16:14 -0800
        Re: Problem while doing a cat on a tabbed file with pexpect Cameron Simpson <cs@zip.com.au> - 2012-01-16 12:45 +1100
  Re: Problem while doing a cat on a tabbed file with pexpect Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-01-16 02:01 +0000

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