Given the following... #!/usr/bin/python import pexpect p = pexpect.spawn('cat') p.sendline('1234') p.expect (['1234']) p.expect (['1234']) I no output when I run it... [cdalten at localhost oakland]$ ./ecat.py [cdalten at localhost oakland]$ I don't get it. I was expecting to see the output from both the tty and cat. Instead, I see nothing. Why?