import paramiko
input = raw_input("Please enter the input filename: ")
output = raw_input("Please enter the output filename: ")

paramiko.util.log_to_file("filename.log")
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
input_file = open(input, 'r')
output_file = open(output, 'w')
output_file.write('-------------OPEN SSH SERVERS-----------------------\n\n')
for line in input_file.readlines():
    try:
        ssh.connect(line, username='root', password='toor')
        transport = ssh.get_transport()
        transport.set_keepalive(5)
    except paramiko.ssh_exception.AuthenticationException:
        print "no login found " + line
        try:
            stdin, stdout, stderr = ssh.exec_command("whoami", timeout=5)
        except paramiko.ssh_exception.SSHException:
            print "could not exec command"
        for base in stdout.readlines():
            print "found login: " + line
            output_file.write(line)

input_file.close()
ssh.close()
output_file.close()
"""
Traceback (most recent call last):
  File "par.py", line 22, in <module>
    for base in stdout.readlines():
NameError: name 'stdout' is not defined
"""