Can python popen capture interactive output of a subprocess of a subprocess

Question

We have an app named app.exe which in turn is a wrapper for a java.exe for the installanywhere launcher. Suppose we have a python script a.py which calls app.exe which then spawns the java.exe process, how do we capture the interactive outputs and inputs between a.py and java.exe

Can Popen do that ? Are there simple examples we could read more to follow ? Can pexpect be used in this scenario too ?

Thanks

Maksym Polshcha · Answer 1 · 2013-03-08T09:15:13.327

2

That's possible if your a.exe redirects its own stdin to java.exe stdin and java.exe stdout to its own stdout.

Have a look at subprocess.Popen. There are 2 optional arguments: stdin controlling subproces's standard input and stdout, which controls subproces's standard output.

edited Mar 08 '13 at 09:15

answered Mar 07 '13 at 07:58

Maksym Polshcha

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Hi Maksym thanks for responding; could you provide a sample to show how this works ? – chz Mar 08 '13 at 02:40
@chz I have updated my answer. Actually I know nothing about your a.exe file and can say nothing about its stdin/stdout. – Maksym Polshcha Mar 08 '13 at 09:17

Can python popen capture interactive output of a subprocess of a subprocess

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