Getting output from a Python script subprocess
Question: This may be a stupid question but I have a Python script that starts a
subprocess (also a Python script) and I need that subprocess to return three
integers. How do I get those return values from the Python script that starts
the subprocess? Do I have to output the integers to stdout and then use the
check_output() function?


Answer: The answer is _Yes_... I want my +15 reputation!! **:-D**

No, seriously... Once you start dealing with subprocesses, the only way you
really have to communicate with them is through files (which is what `stdout`,
`stderr` and such are, in the end)

So what you're gonna have to do is grab the output and check what happened
(and maybe the spawned process' `exit_code`, which will be zero if everything
goes well) Bear in mind that the contents of `stdout` (which is what you'll
get with the `check_output` function) is an string. So in order to get the
three items, you'll have to split that string somehow...

For instance:

    
    
    import subprocess
    
    output = subprocess.check_output(["echo", "1", "2", "3"])
    print "Output: %s" % output
    int1, int2, int3 = output.split(' ')
    print "%s, %s, %s" % (int1, int2, int3)
    

