How do I execute a command from within python and wait on that command?

[Matt Nordhoff]

Rafael Sachetto wrote:
> os.system(command)
> 
> or
> 
> proc = popen2.Popen3(command)
> proc.wait()

I don't know about "cleanly terminat[ing] the command shell", but you
should use the subprocess module now, not any of the other functions
scattered around.
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