Kann Vearasilp wrote:
Dear all,
I tried using python to execute some external java program in my code.
My problem is the os.system(cmd) was not working properly while
Define "not working properly".
My guess is that you're probably getting an exception
OSError: [Errno 2] No such file or directory
before os.system is even called. For the code you give to even have a
hope of working correctly, you need to call it from the current
directory containing:
current directory:
tmp/medusa
mirnaworkbench/Medusa/Medusa.jar
otherwise abspath will fail and os.system will not even be called.
executing 'java' from terminal worked just fine. I am not sure what is
wrong here.
In the Python code you give, you don't just execute "java", you execute
a fairly complex command line. What happens when you execute that
*exact* same line from the terminal, not just "java"?
Is there a way to print out/detect error in my code for
this case?
os.system(cmd) will print any output to the terminal, just as if you ran
it from the terminal yourself. Open a Python interactive interpreter,
and run os.system(cmd) at the prompt, and read the output.
--
Steven
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