how do I know when popen() finishes?

[jschmitt at vmlabs.com]

I'm using Python 2.0b2 on Wind2000.

If I do something like

import os
f = os.popen( 'busyprogram' )

how do I retrieve all the output that busyprogram produces when
busyprogram finishes?  Do I busy wait on f.read(), ie, wait for end of
file?  Does f.close() do the same thing as pclose(f)?

Thanks.

John


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