CODEWITHSUNDEEP
swingsubprocessjython
gthm
gthm

Reputation: 1948

printing the output of shell command from python subprocess

I am running a shell script which emits lots of line while executing...they are just status output rather than the actual output....

I want them to be displayed on a JTextArea. I am working on jython. The piece of my code looks like:

self.console=JTextArea(20,80)
cmd = "/Users/name/galaxy-dist/run.sh"
p = subprocess.Popen(cmd, stdout=subprocess.PIPE,stderr=subprocess.PIPE, shell=True)
self.console.append(p.stdout.read())

This will wait until the command finishes and prints the output. But I want to show the realtime out put to mimic the console. Anybody have the idea ?

Upvotes: 0

Views: 151

Answers (1)

skrrgwasme
skrrgwasme

Reputation: 9633

You're making things more complicated than they need to be. The Popen docs state the following about the stream arguments:

With the default settings of None, no redirection will occur; the child’s file handles will be inherited from the parent. [my emphasis]

Therefore, if you want the subprocess' output to go to your stdout, simply leave those arguments blank:

subprocess.Popen(cmd, shell=True)

In fact, you aren't using any of the more advanced features of the Popen constructor, and this particular example doesn't need any parsing by the shell, so you can simplify it further with the subprocess.call() function:

subprocess.call(cmd)

If you still want the return code, simply set a variable equal to this call:

return_code = subprocess.call(cmd)

Upvotes: 1

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