FastAPI Basics | Build Your First Python Backend API
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Learn FastAPI basics and build your first Python API in this beginner-friendly backend development tutorial.
In this video, we start learning FastAPI from the ground up and understand how a basic Python backend application works. You'll create your first FastAPI application, build your first API route, run the application using Uvicorn, use hot reload during development, and understand the basic structure of a FastAPI project.
This video is part of the *AI Backend Engineering* series, where we are building the backend fundamentals required to develop modern web applications, AI applications, RAG systems, LLM-powered applications, and AI agents.
In this FastAPI tutorial, you'll learn:
What FastAPI is
How to create a FastAPI application
Creating your first API route
Using `@app.get()`
Returning JSON responses
Running FastAPI with Uvicorn
Using hot reload during development
Understanding the basic FastAPI project structure
How a Python backend application works at a basic level
Code used in this video:
```python
from fastapi import FastAPI
app = FastAPI()
@app.get("/")
async def root():
return {"message": "Hello World"}
```
What we're building next
This video is only the beginning of the FastAPI section of the AI Backend Engineering series.
In upcoming videos, we'll go deeper into FastAPI and backend engineering, including:
FastAPI routing
GET, POST, PUT, PATCH and DELETE
Path parameters
Query parameters
Request bodies
Pydantic models
Data validation
HTTP status codes
Error handling
Dependency injection
PostgreSQL and databases
Authentication and authorization
Async programming
Production-ready APIs
Building APIs for AI applications
RAG backends
LLM applications
AI agents
The goal of this series is not just to learn FastAPI syntax. The goal is to understand *how to build real-world Python backends that can power modern web and AI applications.*
This series is useful for:
Backend developers
Python developers
Full Stack Developers
AI Engineers
GenAI Developers
Developers learning FastAPI
Developers moving from Node.js to Python
Developers building AI and LLM applications
If you're learning backend development for AI engineering, subscribe and follow the complete series.
#FastAPI #Python #BackendDevelopment
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