[IPython-dev] Does Ipython have the equivalent to the 'wait' keyword in bash?

[Erik Tollerud]

I'm not sure if there is any builtin ipython magic that does this, but
one potential approach might be:


import subprocess

p1=subprocess.Popen('cmd1')
p2=subprocess.Popen('cmd2')
p3=subprocess.Popen('cmd3')

#do your other stuff

p1.wait()
p2.wait()
p3.wait()

print 'Done!'



On Thu, Dec 10, 2009 at 5:41 AM, Sarbak, Joseph <Joseph.Sarbak at rbccm.com> wrote:
>
>
> Hello,
>
> Firstly, I would like to let you know that Ipython is a wonderful
> interpreter, and I would like to use it as my shell. Thanks for your
> hard work.
>
> However, there is one question I have, for which I have tried to find a
> solution in the documentation.  I haven't found any advice in the docs
> so, here goes...
>
> Just as in bash, I would like to launch multiple processes in the
> background and then at some point in the parent script, wait for the
> results.  It is so easy to do in most shell languages.  Example:
>
>        #!/bin/bash
>
>        task1&
>        task2&
>        task3&
>
>        # do some other work
>
>        wait
>
>        echo "Done!"
>
> Would anyone be able to recommend a simple or even trivial way to
> perform the same parallelization work in ipython?  I would like to be
> able to do this on the local node.  No distributed processing is
> desired.
>
> Thank you.
> Joe Sarbak
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