I'm looking for an example on how to use select.select() with subprocess to monitor stdout

Question

Basically, I have an application that is loaded using

p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

I can send it commands using p.stdin.write() without any trouble, but I need to monitor stdout for server responses. this whole thing is running inside a tcp server, so I need to know if select.select() is going to stop execution when its called. I also can't find any example code using select.select and I find the manual page to be a little confusing. Could someone here offer some advice on this?

Answer 1

A non-None timeout parameter will make sure that select() doesn't block.