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Building High-Performance APIs with FastAPI

Administrator admin API Python Intermediate Jan 09, 2026 12:41 AM 3 views

FastAPI Features

FastAPI is a modern Python web framework for building APIs with automatic documentation, type validation, and high performance.

Basic FastAPI App

from fastapi import FastAPI
from pydantic import BaseModel
from typing import List

app = FastAPI()

class Item(BaseModel):
    name: str
    price: float

items = []

@app.get("/")
async def root():
    return {"message": "Hello World"}

@app.get("/items", response_model=List[Item])
async def get_items():
    return items

@app.post("/items", response_model=Item)
async def create_item(item: Item):
    items.append(item)
    return item

Best Practices

  • Use Pydantic models for validation
  • Leverage automatic API documentation
  • Use async/await for I/O operations
  • Implement proper error handling
  • Use dependency injection

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