PHP to Python Server Pages, Sessions and EXEC - php

Question

I'm trying to convert this PHP to psp(python server pages). I'm at a loss with the php exec function and isset for the session variables.
session_start();
if(isset($_POST["var"])){
//set session username
$username = (string)$_POST["var"];
$username = trim($username);
$_SESSION['username'] = $username; //store $username
}
if(isset($_SESSION['username'])){
$username = $_SESSION['username']; //store session[username] as $username
$cmd = '/var/www/cgi-bin/resolveID.py ' . escapeshellcmd($username);
$fullname = exec($cmd);
$_SESSION['fullname'] = $fullname;
}
else{
echo 'Your session has expired, please click here';
exit;
}
This is what i have
<%
import cgitb, session
cgitb.enable()
user_session = Session.Session()
#post info
if form.getvalue('var'):
varUsername = form.getvalue('var')
user_session['username'] = varUsername
#session set stuff
try:
if user_session['username']:
#is set
varUsername = user_session['username']
varCMD = '/var/www/cgi-bin/resolveID.py ' + varUsername
varFullname = subprocess.check_output(varCMD)
user_session['fullname'] = varFullname
except:
#not set
req.write('Your session has expired, please click here')
%>

Answer 1

I think subprocess.check_output() is the function you are looking for:
fullname = subprocess.check_output(['/var/www/cgi-bin/resolveID.py', username])
Instead of isset($array['key']) you use 'key' in array in python.