Mar 22
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Theory is good, but implementation is better. In Part 5 of the FastAPI Masterclass, we are doing a full live demo of POST Requests. We missed the execution in the last episode, so today we are opening the Swagger UI and Postman to show exactly how data travels from a client to your Python backend. [What You’ll Learn] Swagger UI Deep Dive: How to execute POST requests directly from your browser. Payload Inspection: Reading JSON data in the FastAPI terminal. Error Handling: What happens when you send "Bad Data" (The 422 Unprocessable Entity). Developer Workflow: Using the "Try it out" feature to speed up backend testing. [Timestamps] 0:00 - Why Demos Matter: Seeing the Code in Action 2:45 - Launching the Docs: FastAPI’s Secret Weapon 6:10 - Formatting the JSON Payload for Success 11:30 - Breaking the API: Testing Validation Errors 17:45 - Monitoring Server Logs & Uvicorn Output 23:10 - The Power Move: Exporting to Curl/Postman fastapi tutorial for beginners, FastAPI Demo, Testing POST Requests, FastAPI Swagger UI, Postman API Tutorial, Python Backend Testing, API Lifecycle Management, Quality Assurance for Developers, Backend Debugging Tools, Software Development Life Cycle (SDLC), Professional API Documentation, Enterprise Testing Workflows