import paramiko

def start_connection():
    u_name = 'root'
    pswd = ''
    port = 22
    r_ip = '198.x.x.x'
    sec_key = '/mycert.ppk'

    myconn = paramiko.SSHClient()
    myconn.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    my_rsa_key = paramiko.RSAKey.from_private_key_file(sec_key)

    session = myconn.connect(r_ip, username =u_name, password=pswd, port=port,pkey=my_rsa_key)
...
...

follow python code to perform some actions on remote machine.

ImportError: No module named asn1crypto.algos