Daniel Arbuckle's Mastering Python

Pipes

Pipes are one-to-one communication channels. When we call a pipe, we get back a pair of objects that each serve as one end of the communication stream. If we give one end each to a pair of processes, they could send messages and data back and forth through the pipe.

Each end of the pipe has the same methods. The interesting methods are send, recv, and poll. Consider the following code example:

In the preceding code example, we see these:

• The send method accepts an object as its parameter and sends it to the other endpoint.
• The recv method waits for something to be sent from the other endpoint, and then returns it.
• The poll method returns ...