For anyone stuck on the python part, if you read what the script is doing, you should be able to extract the correct IV and then hexify the passphrase to use this site: http://aes.online-domain-tools.com/ 
For anyone stuck on the python part, if you read what the script is doing, you should be able to extract the correct IV and then hexify the passphrase to use this site: http://aes.online-domain-tools.com/