Read/Write from/to a process

[Michael Schneider]

Jas,

I use a python called twisted to run processes as you describe.

Twisted is an event-driven framework that brings a change in the
way that you look at things.

take a look at:

http://twistedmatrix.com/projects/core/documentation/howto/process.html

Good luck, hope this is useful,
Mike


jas wrote:
> Hi,
>   I would like to start a new process and be able to read/write from/to
> it.  I have tried things like...
> 
> import subprocess as sp
> p = sp.Popen("cmd.exe", stdout=sp.PIPE)
> p.stdin.write("hostname\n")
> 
> however, it doesn't seem to work.  I think the cmd.exe is catching it.
> 
> I also tried
> f = open("out.txt", "w")
> sys.stdout = f
> os.system("cmd.exe")
> 
> ..but out.txt didn't contain any output from cmd.exe
> 
> So, how can I create a process (in this case, cmd.exe) on Windows and
> be able to read/write from/to it?
> 
> Thanks
> 


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The greatest performance improvement occurs on the transition of from 
the non-working state to the working state.