python popen可以捕获子流程的子流程的交互式输出吗？

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

Answer 1

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.