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subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window

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  subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window "Veek. M" <vek.m1234@gmail.com> - 2016-07-12 08:50 +0530
    Re: subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-07-12 16:27 +1000
      Re: subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-07-12 16:28 +1000
      Re: subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window Random832 <random832@fastmail.com> - 2016-07-12 09:39 -0400
      Re: subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window "Veek. M" <vek.m1234@gmail.com> - 2016-07-12 19:43 +0530
    Re: subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-12 18:42 -0700

#111310 — subprocess: xterm -c cat, need to send data to cat and have it displayed in the xterm window

Script grabs some image data and runs imagemagick on it to extract some 
chinese. Then tesseract OCR to get the actual unicode.

I then need to get it translated which also works and then display in 
XTerm using cat.

I could cat << named_pipe but I was wondering if this was the only way?
Could I juggle fd's instead?


#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys, time

import shlex
import codecs, subprocess

import goslate
from textblob.blob import TextBlob


def cmd_exec(cmd, wait=True, shell=True):
    print cmd
    
    cmd_line = shlex.split(cmd)
    retobj = subprocess.Popen(cmd_line, shell, cwd='/tmp', 
stdin=subprocess.PIPE)
    
    if wait:
        retobj.wait()
    
    return retobj

def get_text_and_process(skip=False):
    if skip: return
    cmd_exec('import /tmp/x.png')
    cmd_exec('convert /tmp/x.png -resize 200% /tmp/x.resize.png')
    cmd_exec('tesseract /tmp/x.resize.png /tmp/tao -l chi_sim')


get_text_and_process(skip=True)

fh = codecs.open('/tmp/tao.txt', encoding='utf-8')
fd = cmd_exec('xterm -en utf-8 -geometry 50x20+0+0 -e /bin/bash -c "cat 
-"', shell=False, wait=False)
fd.communicate('test\n') #how do i communicate with cat and not xterm
sys.exit() #I EXIT HERE


#This stuff doesn't run (but works) - sys.exit above
for line in fh.readlines():
    try:
        print >>fd.stdout, line.encode('utf-8')
        
        blob = TextBlob(line)
        print >>fd.stdout, blob.detect_language()
        print >>fd.stdin, blob.translate(to='en') 
    except UnicodeDecodeError, TranslatorError:
        pass

fh.close()

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#111320

On Tuesday 12 July 2016 13:20, Veek. M wrote:

> Script grabs some image data and runs imagemagick on it to extract some
> chinese. Then tesseract OCR to get the actual unicode.
> 
> I then need to get it translated which also works and then display in
> XTerm using cat.

Why not just print it? Why do you have to use cat? That sounds like "Useless 
use of cat" to me:

http://porkmail.org/era/unix/award.htmlhttp://porkmail.org/era/unix/award.html

-- 
Steve

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#111321

On Tuesday 12 July 2016 16:27, Steven D'Aprano wrote:

> On Tuesday 12 July 2016 13:20, Veek. M wrote:
> 
>> Script grabs some image data and runs imagemagick on it to extract some
>> chinese. Then tesseract OCR to get the actual unicode.
>> 
>> I then need to get it translated which also works and then display in
>> XTerm using cat.
> 
> Why not just print it? Why do you have to use cat? That sounds like "Useless
> use of cat" to me:
> 
> 
http://porkmail.org/era/unix/award.htmlhttp://porkmail.org/era/unix/award.html
> 


Oopsm, accidentally doubled the URL.

http://porkmail.org/era/unix/award.html

-- 
Steve

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#111336

On Tue, Jul 12, 2016, at 02:27, Steven D'Aprano wrote:
> On Tuesday 12 July 2016 13:20, Veek. M wrote:
> > I then need to get it translated which also works and then display in
> > XTerm using cat.
> 
> Why not just print it? Why do you have to use cat?

Well, displaying something in a new xterm (i.e. not one that already
exists and is your controlling terminal) without a process to run "in"
the terminal is rather esoteric and isn't portable to terminals other
than xterm.

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#111337

Steven D'Aprano wrote:

> On Tuesday 12 July 2016 13:20, Veek. M wrote:
> 
>> Script grabs some image data and runs imagemagick on it to extract
>> some chinese. Then tesseract OCR to get the actual unicode.
>> 
>> I then need to get it translated which also works and then display in
>> XTerm using cat.
> 
> Why not just print it? Why do you have to use cat? That sounds like
> "Useless use of cat" to me:
> 
> 
http://porkmail.org/era/unix/award.htmlhttp://porkmail.org/era/unix/award.html
> 

Yeah, i changed that to 'tail -f' - works much better with tempfile.

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#111367

On Tuesday, July 12, 2016 at 3:20:35 PM UTC+12, Veek. M wrote:
> I then need to get it translated which also works and then display in 
> XTerm using cat.

<http://catb.org/jargon/html/U/UUOC.html>

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