pygtk - the output of bash commands on a TextView widget

[tseliot]

Hi, I would like to know how I can redirect the output of bash commands (e.g. apt-get install vim-gnome) to a TextView widget using pygtk.

For example if I press a button (see the attached code) I would like to call a few commands in bash (os.popen doesn't seem to handle well commands such as "apt-get install vim-gnome" ) and display their output on the TextView widget.


If this is not possible with a TextView widget I would appreciate any suggestion about an alternative. An explanation about how I could use python-vte in this case would be very welcome.

I have attached the file project.tar.gz which contains the file written in Python (myapp.py) and the .glade file

Thanks in advance.

[duff]

Originally Posted by tseliot An explanation about how I could use python-vte in this case would be very welcome.

easy. here's a snippet from a program i wrote a while back.

         v = vte.Terminal()
         v.fork_command('bash')
         v.feed_child('ssh %s tail -f %s.o%s \n' % (host,jname,id))
         v.show()
         notebook.append_page(v, tab_label=gtk.Label(nodeid))

[tseliot]

Thanks for your reply.

VTE works great now

[earobinson]

any way to get rid of the prompt?

eg

v = vte.Terminal()
v.fork_command('bash')
v.feed_child('whoami\n')
v.feed_child('echo test\n')
v.show()

outputs

whoami echotest earobinson@minusone:/media/data/dev/propensity/src/sandbox$ whoami earobinson earobinson@minusone:/media/data/dev/propensity/src/sandbox$ echo test test

but I want

earobinson test

[earobinson]

Ok so I have found another problem

#!/usr/bin/env python

import os
import gtk
import vte
import time
from subprocess import Popen, PIPE

def show_callback(terminal):
    terminal.feed_child('cd /\n')
    terminal.feed_child('whoami\n')
    terminal.feed_child('echo test\n')
    for ii in range (10):
        terminal.feed_child('echo ' + str(ii + 1)  + '\n')
        time.sleep(1)

def write(terminal, text):
    x, y = terminal.get_cursor_position()
    terminal.feed(text + '\n', len(text) + 1)

window = gtk.Window()
window.connect('destroy', lambda w: gtk.main_quit())

terminal = vte.Terminal()
terminal.connect("show", show_callback)

child_pid = terminal.fork_command()

#write(terminal, '1234567890')

window.add(terminal)
window.show_all()
gtk.main()

dose not count down, instead it waits 10 seconds then prints everything, any way to make it happen in real time?

[tseliot]

Here is the solution to your problem.

create a file named "ear1" and make it look like this:

#!/bin/bash

NUM="0"

cd /
whoami
echo test

while [ $NUM -lt 10 ]; do
    echo $[$NUM+1]
    NUM=$[$NUM + 1]
    sleep 1
done

type:

chmod +x ear1

then make your python file look like the following:

#!/usr/bin/env python

import os
import gtk
import vte
import time
from subprocess import Popen, PIPE

    
def show_callback(terminal):
    terminal.feed_child('./ear1')

def write(terminal, text):
    x, y = terminal.get_cursor_position()
    terminal.feed(text + '\n', len(text) + 1)

window = gtk.Window()
window.connect('destroy', lambda w: gtk.main_quit())

terminal = vte.Terminal()
terminal.fork_command()
terminal.connect("show", show_callback)



#write(terminal, '1234567890')

window.add(terminal)
window.show_all()
gtk.main()

in other words you will have to make it run a bash script

[earobinson]

hum, so there is no way I could have a user inputting commands in one terminal and the results coming out on the other?

UPDATE:
The problem is then I need to know all the commands that I want to run when I launch the terminal, there seems to be no way to make it interactactive(sp) or monitor the success of each command I issue to the terminal is there?

Ex like a gtk.ProgressBar that monitored each command like synaptic does.

Thanks for the feedback

[tseliot]

Originally Posted by earobinson hum, so there is no way I could have a user inputting commands in one terminal and the results coming out on the other? UPDATE: The problem is then I need to know all the commands that I want to run when I launch the terminal, there seems to be no way to make it interactactive(sp) or monitor the success of each command I issue to the terminal is there?

you can monitor the success of each command by keeping a log and parsing each line you append to the log on the fly.

I'm not sure as to what you mean by interactive.

[earobinson]

I guess the idea in my head was two guis, one that you can type commands into and the other (the terminal) that displays the commands.

maybe this isent possible?

But it seems like I should be able to issue commands to the terminal and get a response from them.

I have made a simple example., What I would like is to push the press me button and then not be able to interact any more until the command has ran to completion.

eventually I would add a gtk.entry and be able to run any command.

I guess what your saying is I should send but the program I want to run and then a output log file to signify that the program is done?

[tseliot]

Originally Posted by earobinson I have made a simple example., What I would like is to push the press me button and then not be able to interact any more until the command has ran to completion. eventually I would add a gtk.entry and be able to run any command. I guess what your saying is I should send but the program I want to run and then a output log file to signify that the program is done?

You can gray out the text are when the user can type the command, pass the command to VTE as you know and then look for a certain line (which you will set) in the log.

here is an example from Envy:

def log_output(self,term):
        column,row = self.term.get_cursor_position()
        if self.r != row:
            off = row-self.r
            text = self.term.get_text_range(row-off,0,row-1,-1,self.capture_text)
            self.r=row
            text = text.strip()
            if "\n" not in text or text[-1] != "\n":
                text += "\n"
            ##self.logged += text
            self.completetxt.append(text)
            a = self.logged
            error = re.compile('.*ENVY ERROR.*\n')
            success = re.compile('.*ENVY:.*Operation.*Completed.*')
            for line in self.completetxt:#self.logged:
                m1 = error.match(line)
                m2 = success.match(line)
            if m1:
                self.error = 'error'
                sep = ''#write a logfile
                logtext = sep.join(self.completetxt)
                logfile = open(self.logtxtfile, 'w')
                logfile.write(logtext)
                logfile.close()
                self.errorcheck()
            if m2:
                self.error = 'noerror'
                sep = ''#write a logfile
                logtext = sep.join(self.completetxt)
                logfile = open(self.logtxtfile, 'w')
                logfile.write(logtext)
                logfile.close()
                self.errorcheck()

in this example the method looks for strings such as "ENVY ERROR" or "ENVY:.*Operation.*Completed" and acts accordingly. For example if self.error == 'noerror' you can trigger a specific action.

You might use strings such as "DONE", etc. so that if you find such a string you can allow the user to type commands again in the text input area.


EDIT: in case you're wonder what self.term is: self.term = vte.Terminal()