How to Make Phone Calls in Different Languages with OpenAI, Python, and Flask

This tutorial teaches how to use Twilio Programmable Voice, Python, Flask, and the OpenAI API to create an application that allows users to practice foreign language phone calls with GPT as their conversation partner. The app guides users through choosing a scenario, language, and comfort level to personalize the conversation. It uses Flask's session object and input_type path parameter to distinguish between various input types and persist user choices across multiple requests. The application initiates a log to track the conversation, passes it on to OpenAI, and instructs Twilio to read the response to the user. Finally, users can test their app locally using ngrok or deploy it to the Internet for wider accessibility.