Trying to chain processes together on a pipeline

[Andrew Berg]

On 2011.07.01 02:26 AM, Peter Otten wrote:
> I can't reproduce your setup, but I'd try using communicate() instead of 
> wait() and close().
I don't really know what communicate() does. The docs don't give much
info or any examples (that explain communicate() anyway), and don't say
when communicate() is useful.