Giles -
First off, thanks so much for taking the time to respond.
I am simply trying to run the generic "quick start" script found on the Twilio website. Trial and error shows me it's failing at the line "import twilio.twiml"
I have to run it through the web app on my account (because it must be publicly exposed to receive SMS.) I do not know how to tell which version of Twilio my pythonanywhere web app is running. However, I have now installed twilio, as you suggest, using pip3.3 and pip3.4.
I literally take a working app, add the line "import twilio.twiml", and it fails. Error message: Unhandled exception.
Any help would be greatly appreciated.