Very odd output from subprocess

[Chris Rebert]

On Wed, Jun 30, 2010 at 9:12 PM, m <mtigges at gmail.com> wrote:
> I have this function:
>
>
> def GetMakeOutput(make, rules, out=None):
>    p = subprocess.Popen('%s %s' % (make,rules),
>                         shell=True,
>                         bufsize=1024,
>                         stderr=subprocess.PIPE,
>                         stdout=subprocess.PIPE,
>                         close_fds=False)
>    ret = []
>    line = p.stdout.readline()
>    while len(line):
>        if line[:5] not in ['make[','make:']:
>            if out:
>                out.write(line)
>                out.flush()
>            else:
>                ret.append(line)
>        line = p.stdout.readline()
>    return string.join(map(string.strip,ret),'\n')
>
> Very simple ... it cleans any line that is output from make itself.
>
> Now, I have used it for quite awhile with no problem.  But, I noticed
> today that it wasn't doing its job on my 64 bit machine.
>
> If I add the line:
>     for l in line: print ord(l),'\t',l
> after the first readline, I get the following:
>
>
> 27
> 91      [
> 48      0
> 48      0
> 109     m
> 27
> 91      [
> 51      3
> 55      7
> 109     m
>
> before the codes begin for the string as it appears if I just print
> it.  So, what is this sequence?  They seem like some sort of escape
> codes, I've never seen this before at all.
>
> Can anyone enlighten me as to what is going on?

http://en.wikipedia.org/wiki/ANSI_escape_code

Running make directly, rather than through the shell, might disable
the use of the codes in whatever program is outputting them.
It's worth a try.

Cheers,
Chris
--
http://blog.rebertia.com