I found this code to connect to remote sftp server with the help of username ,password and host but i also need to include the port number, can any one let em know how to include the port number in this code and also for this piece of code 'parmiko.util.log_to_file(log_filename)' what should i hard code for log_filename ??Iam runnign this code in unix environment.

import os
import paramiko
server, username, password = ('host', 'username', 'password')   
ssh = paramiko.SSHClient()  
parmiko.util.log_to_file(log_filename)    
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())' #In case the server's key is unknown,'
#we will be adding it automatically to the list of known hosts 
ssh.load_host_keys(os.path.expanduser(os.path.join("~", ".ssh", "known_hosts")))   #Loads the user's local known host file  
ssh.connect(server, username=username, password=password) 
ssh_stdin, ssh_stdout, ssh_stderr = ssh.exec_command('ls /tmp') print "output", ssh_stdout.read() #Reading output of the executed co'mmand 
error = ssh_stderr.read()  #Reading the error stream of the executed command
print "err", error, len(error) #Transfering files to and from the remote machine' 
sftp = ssh.open_sftp()   
'sftp.get(remote_path, local_path)'
sftp.put(local_path, remote_path) 
sftp.close()
ssh.close()

There is a port= named argument to the ssh.connect() method. See the manual

Example:

ssh.connect(server, port=portnumber, username=username, password=password)