python-pexpect 2.3-1build1 (amd64 binary) in ubuntu lucid

 Pexpect is a pure Python module for spawning child applications;
 controlling them; and responding to expected patterns in their
 output. Pexpect works like Don Libes' Expect. Pexpect allows your
 script to spawn a child application and control it as if a human were
 typing commands.