[Tutor] os.popen

[Danny Yoo]

On Mon, 29 Nov 2004, Klas Marteleur wrote:

> hmm..
> Is it nesessary to close the "file objects"?
>
> a = os.popen3("tcextract -v")
> tcexVerOut= a[2].readlines()
> a[0].close() #Nesessary?
> a[1].close() #Nesessary?
> a[2].close() #Nesessary?

Hi Klas,


Almost certainly yes at some point, due to "flow-control" issues.  It's
very possible that a command like tcextract will stall until its input
stream is closed.

For more information, see:

    http://www.python.org/doc/lib/popen2-flow-control.html

Good luck to you!