Getting subprocess.call() output into a string?

[Nick Stinemates]

On Tue, Apr 15, 2008 at 11:16:01PM +0200, David wrote:
> >
> >  Still, about StringIO...
> >
> 
> The module description says you can use it to read and write strings
> as files, not that you can use strings *everywhere* you can use files.
> 
> In your specific case, StringIO doesn't work, because the stdout
> redirection takes place at the operating system level (which uses real
> file handles), rather than in a python library (for which StringIO
> would probably work).
> 
> David.
> -- 
> http://mail.python.org/mailman/listinfo/python-list

Just a note to all of those who are interested.

I have yet to get this to work properly for an app which runs indefinitely and you want to read the output at a specified interval. Right now the only way I can read is if the _close() method has been called.

Anyway, I wrote a wrapper around it so I could easily change the
implementation if I could ever find a better solution. Here's my code:


===========================
import subprocess
import os
import select

class ProcessMonitor:
    def __init__(self):
        self.__process = None
        self.__stdin = None
        self.__stdout = None
        
    def _create(self, process):
        self.__process = subprocess.Popen(process, stdin=subprocess.PIPE, stdout=subprocess.PIPE, close_fds=True)
        self.__stdin = self.__process.stdout
        
        self.__stdout = self.__process.stdout
        
    
    def _close(self):
        os.kill(self.__process.pid,9)
    
    def _listen(self):
        """
        get from stdout
        """
        return "".join(self.__stdout.readlines())

    def _listen2(self):
	"""
	My attempt at trying different things.
	"""
        inp, out = self.__process.communicate("")
        print out
            

-- 
Nick Stinemates (nick at stinemates.org)
http://nick.stinemates.org