sendemail.py throws not compatible with Python 3 errors

[deepthi5]

Hello All,

I have copied senemail.py to a custom app to modify it for adding html inputs to email .

Now this custom copy throws not compatible with python 3 error , where as original sendemail.py in search/bin does not throw any error 

I just modified a small statement in the script to add html inputs apart from that remaining script is same as search /bin copy 

[VatsalJagani]

@deepthi5 - Please share more details about the error and relavent lines of code that throws error so the community can help.