Open 2 terminals and print 2 different message in Python

Question

I am new python (ver 2.7) programmer and I have a question how to open 2 terminals and output different message.

The main task of this program is open 2 terminals and output different message. Right now, I have 3 following files

test.py -- it is the main file that suppose to open 2 terminals and call different python 2 files
print1.py -- this is simple 1 line of code which print the line of "this is 1st terminal"
print2.py -- same as print1.py. it output "this is 2nd terminal"

Currently, my test.py has following code:

import subprocess
subprocess.call(['gnome-terminal','-x','python print1.py'])
subprocess.call(['gnome-terminal','-x','python print2.py'])

When I execute the program, it opens two terminals and both of them tell "There was an error creating the child process for this terminal. Failed to execute child" . Then, I have tried to write full path of print1/print2.py but it still gives same error and I am get stuck in there. Please some give me some advice to solve this error.

related: How can I open two consoles from a single script. Have you tried the code from my answer? How exactly does it fail? — jfs
– jfs, Commented Sep 13, 2014 at 20:21

falsetru · Accepted Answer · 2014-09-13 19:57:33Z

1

You need to specify python and the file path as separated items. Otherwise, python print1.py is interpreted as a program name instead of python.

import subprocess
proc1 = subprocess.Popen(['gnome-terminal', '-x', 'python', 'print1.py'])
proc2 = subprocess.Popen(['gnome-terminal', '-x', 'python', 'print2.py'])
proc1.wait()
proc2.wait()

NOTE: I changed call with Popen. call waits the program terminate; the second terminal will not be executed until the first program terminate.

UPDATE

BTW, unless the scripts does not pause after print, gnome-terminal will close as soon as the python program terminate.

If you want shell prompt after the program termination, put following lines at the end of each file (print1.py, print2.py):

import os
os.execv('/bin/sh', ['sh'])

edited Sep 13, 2014 at 19:57

answered Sep 13, 2014 at 17:06

falsetru

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18 Comments

Shin Over a year ago

Thank you for answering my question. From your advice, there is no error coming out now. However, your os.execv seems not working... Then, I have written this code in both print file for testing: print "this is first terminal" while 1: var = raw_input("Please enter something:) print var When I execute the program, it first open terminal then it close the terminal immediately. Could you give me some advice for this issue?

falsetru Over a year ago

os.execv('/bin/sh', ['sh']) just works for me. Please run the python print1.py separately, then show me the error traceback if you have any.

Shin Over a year ago

python print1.py works perfectly. it print out message then it start shell. Thus I do not believe that print1.py has the problem. But when I try to execute from test.py, it launches new terminal then close it immediately. I try to use both Popen and call but it seems it has same issue.

falsetru Over a year ago

@Shin, What happen if you put input() at the end of the script?

Shin Over a year ago

It still has same issue. From terminal, typing gnome-terminal -x python print1.py works perfectly fine. But when i use subprocess.call / Popen, it has the issue

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