How to Build a Simple AI Weather Agent in Python Using OpenAI and APIs

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A new beginner-friendly tutorial published on DEV Community walks developers through building their first AI agent in Python. Unlike basic chatbots, AI agents can perceive input, decide on actions, and use external tools to achieve a goal. The guide uses OpenAI's function-calling API alongside OpenWeatherMap to create a weather assistant capable of answering location-based weather queries. Developers need Python 3.10 or later, an OpenAI API key, and an OpenWeatherMap API key to follow along. The tutorial covers the core agent loop — receiving a request, deciding whether a tool is needed, calling it, and generating a response — as a foundation for building more advanced agents.

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