FastAPI & Uvicorn Explained Simply | Build Your First REST API
📌 What You’ll Learn
✅ What is FastAPI
✅ Why Uvicorn is needed (server explanation)
✅ ASGI explained in simple terms
✅ Build REST APIs (Create, Read, Delete)
✅ Request validation using Pydantic
✅ Error handling with HTTPException
✅ Run FastAPI app step-by-step
✅ Auto-generated Swagger Docs
🧠 Core Concept
👉 FastAPI = Your Application (Business Logic)
👉 Uvicorn = Server (Entry Gate for users)
Without Uvicorn, your app exists…
but nobody on the internet can access it.
🔁 Architecture Flow
Browser
↓
HTTP Request
↓
Uvicorn (Server)
↓
FastAPI (App Logic)
↓
Response
💻 What We Build
A simple User API with:
Create User (POST)
Get User (GET)
Delete User (DELETE)
All using in-memory storage for simplicity.
🎯 Who Should Watch?
Beginners in Backend Development
Students learning APIs
System Design beginners
Anyone starting FastAPI
❤️ If you found this helpful:
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Find the code here:
https://github.com/Vaibhav-Joshi-code...