Help wanted in piping in Windows

[Apple Grew]

I want to develope a Winboard like application which will support 
Winboard protocol. For that I require to know how to handle piping in 
Python. I seperated out module popen2, but when I use 
fileObject.readline() then it halts the program if the sub-process is 
waiting for user input; will executing the readline() part in a seperate 
thread be helpful? My target platform is Windows.

Links to helpful web resources and sample Python codes will be highly 
appreciated.

Regards,
Apple