how i can open different linux terminal to output differnt kinds of debug information in python?

Question

I need output different information to different terminal instances instead of print them in same output stream, say std.err or std.out.

for example: I have 5 kinds of information say A-E need to be displayed on different terminal windows on same desktop, looks like

[terminal 1] <- for displaying information A

[terminal 2] <- for displaying information B

[terminal 3] <- for displaying information C

[terminal 4] <- for displaying information D

[terminal 5] <- for displaying information E

I know I can output them into different files, then open terminals read the file in loop, but what I want is python program can open terminal by program itself and print to them directly when it is needed.

Is it possible?

Thanks!

KC

[edit] the best solution for this case is using SOCKET as the IPC I think if the resource is not a matter, it will come with best compatible capability - a server client mode. and the pipe / subprocess will also be the useful solutions under same platform

Ignacio Vazquez-Abrams · Accepted Answer · 2010-05-29 03:09:10Z

3

Open a pipe, then fork off a terminal running cat reading from the read end of the pipe, and write into the write end of the pipe.

answered May 29, 2010 at 3:09

Ignacio Vazquez-Abrams

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taleinat · Accepted Answer · 2010-05-29 08:34:51Z

1

Using the subprocess module, just run several instances of whichever terminal program you like, each running "cat", using subprocess.Popen. Pass stdin=subprocess.PIPE in addition to the terminal command to Popen. Then you can just write to each terminal's stdin attribute.

Something along the lines of (untested!):

import subprocess
p = subprocess.Popen('xterm -e "cat > /dev/null"', stdin=subprocess.PIPE)
p.stdin.write("Hello World!")

answered May 29, 2010 at 8:34

taleinat

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2 Comments

K. C Over a year ago

thanks! the original line seems missing parameter "shell=True," otherwise it will goes exceptional. however, after I added the shell=True, is shows nothing on the xterm... import subprocess p = subprocess.Popen('xterm -e "cat > /dev/null"', shell=True, stdin=subprocess.PIPE) p.stdin.write("Hello World!")

taleinat Over a year ago

Perhaps this is because of buffering? Try p.stdin.flush() after writing to it. I'm sorry but I don't have access to a Linux terminal at the moment to try this out.

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