title: pexpect setecho not working
body: <p>I am trying to telnet to Cisco Router and give commands using pexpect. Its working, but the sendline() repeats in the output. even after using setecho to False. Code is:</p>
  
  <pre><code>'''
  Created on Nov 19, 2012
  
  @author: Amit Barik
  '''
  
  import pexpect
  
  hostname = 'hostname'
  login_cmd = 'telnet ' + hostname + '.net'
  username = 'username'
  password = 'pwd'
  prompt = hostname + '#'
  
  p = pexpect.spawn(login_cmd)
  p.setecho(False)
  p.logfile = open('Log.log', 'w+')
  
  p.expect('Username:')
  print '1',repr(p.before)
  
  p.sendline(username)
  p.expect('Password:')
  print '2',repr(p.before)
  
  p.sendline(password)
  p.expect(prompt)
  print '3',repr(p.before)
  
  cmd = 'show clock'
  p.sendline(cmd)
  p.expect(prompt)
  print 'Output for {0}'.format(cmd), repr(p.before)
  </code></pre>
  
  <p>Output is:</p>
  
  <pre><code># On Python Console
  Output for show clock 'show clock\r\n00:16:40.692 UTC Tue Nov 20 2012\r\n'
  
  # On Log File
  Username: username
  username
  Password: pwd
  
  My Cisco Banner
  
  hostname#show clock
  show clock
  00:16:40.692 UTC Tue Nov 20 2012
  hostname#
  </code></pre>