gistfile1.txt

#!/usr/bin/python
import re
import sys
import os

def ReadUntilPrefix(prefix):
  k = 0
  buff = ''
  while True:
      buff += sys.stdin.read(1)
      if buff.endswith('\n') or buff.endswith('\r'):
          return buff[:-1]
          buff = ''
          k = k + 1
      elif buff.startswith(prefix):
          return buff


host = None
passwords = { "host1": "password1", "host2": "Password2" }

while True:
  line = ReadUntilPrefix("Password:")
  if len(line) == 0:
    continue
  m = re.search(r".*ssh user@([^ ]*)", line)
  if m:
    host = m.groups()[0]
  elif line == "Password:":
    sys.stdout.flush()
    if passwords.has_key(host):
      print passwords[host]
    host = None
  else:
    host = None