ssh connect

import paramiko

def ssh2(ip,username,passwd,cmd):
    try:
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        paramiko.util.log_to_file("filename.log")
        ssh.connect(ip,22,username,passwd)
        print "11111111111111111"
        for m in cmd:
            print m
            stdin, stdout, stderr = ssh.exec_command(m)
            out = stdout.readlines()
            for o in out:
                print o,
        print "%s OK "%(ip)
        ssh.close()
    except:
        print "%s Error "%(ip)

if __name__=="__main__":
    ip = "192.168.111.162"
    username = "root"
    passwd = "asdf1234"
    print "Begin...."
    cmd=["ls",
        "which python"]
    ssh2(ip,username,passwd,cmd)

 def ssh_exec(hostname, port, username, key, password, component, content):
    cmd  = "zgrep " + content + "/dir" + component + "/* | sort -t: -k 2.1,4 "
    s = paramiko.SSHClient()
    s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    s.connect(hostname=hostname, port=port, username=username, pkey=key, password=password)
    ssh = s.invoke_shell()
    time.sleep(0.1)
    ssh.send('su - ')
    buff = ''
    sleep_loop = 0
    while not buff.endswith('Password: '):
        resp = ssh.recv(9999)
        buff +=resp
    time.sleep(0.5)
    ssh.send(root_pwd)
    ssh.send(' ')
    buff = ''
    while not buff.endswith('# '):
        resp = ssh.recv(9999)
        buff +=resp
        time.sleep(1)
        sleep_loop +=1
        if sleep_loop == 3:
            raise Exception('Please confirm root password, or contact developer.')
    ssh.send(cmd)
    ssh.send(' ')
    buff = ''
    while not buff.endswith('# '):
        resp = ssh.recv(9999)
        buff +=resp
    s.close()
    result = buff
    print result