donald petravick added the comment: Victor, thanks so much for reading my ticket and contacting me.
I prototyped what makes sense to me by subclassing subprocess.Popen and Over-ridden the wait method to do what I suggested. Proof of concept attached. \ It¹s a bit of a hack since I cribbed code from Popen.wait(). Now that you¹ve made me think harder, The use case that stood out was the case where I called the communicate() method which both handles IO and the termination of the process AFAICT. I _do_ understand the portability argument you are making (and am clueless about what¹s to be done with windows). ‹ Thanks ‹ Don On 5/14/14, 5:28 PM, "STINNER Victor" <rep...@bugs.python.org> wrote: > >STINNER Victor added the comment: > >I guess that you mean "Popen" when you write "Pipe"? > >Even if Popen has a high-level wait() method implemented with >os.waitpid(), you are free to use a low-level function using the pid >attribute. > >proc = subprocess.Popen(...) >os.wait4(proc.pid, ...) > >> have an new data member, rusage, make the resource usage available to >>the caller. > >I don't know how to get the rusage of a specific child process, but you >can use resource.getrusage(resource.RUSAGE_CHILDREN) which gives the >usage of *all* child processes. Again, you have the pid, and so you are >free to use any function to retrieve the resource usage of the child >process. See also this project which can help you: >https://pypi.python.org/pypi/psutil > >I don't think that the subprocess should be modified to your use case, >it's already possible to implement you use cases without modify it. >Python is a (very) portable language, and it's very hard to provide the >same API for such low-level metrics (rusage). I don't think that Windows >provides exactly the same data for example. > >You can build your own module on top of subprocess and other modules like >psutil. > >---------- >nosy: +haypo > >_______________________________________ >Python tracker <rep...@bugs.python.org> ><http://bugs.python.org/issue21504> >_______________________________________ > ---------- Added file: http://bugs.python.org/file35256/subprocess4.pyc _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21504> _______________________________________
subprocess4.pyc
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