The Dialogflow Fulfillment Python Library is an open-source framework that handles HTTP requests from Dialogflow, maps intents to Python handler functions, manages session and output contexts, and builds structured responses including text, cards, suggestion chips, and custom payloads. It abstracts the JSON structure of Dialogflow’s webhook API into convenient Python classes and methods, accelerating the creation of conversational backends and reducing boilerplate code when integrating with databases, CRM systems, or external APIs.