Create a Cold War-Era Numbers Station with Twilio Voice and Python Flask

In this tutorial, learn how to create a Cold War-era numbers station using Python Flask and Twilio Voice API. A numbers station is a radio station that periodically reads out a sequence of numbers, believed to be secret codes for intelligence officers. The tutorial guides you through building a Python Flask application that encrypts a message into a string of numbers and uses the Twilio Voice API to read out the coded message to the caller in a creepy voice. You can then enlist friends as secret agents who must use their ingenuity to crack the code and decrypt the message. The prerequisites for this tutorial include Python 3.6+, a Glitch account, a Twilio account, and a verified, voice-capable Twilio phone number.