$ -weight: 500;">pip -weight: 500;">install fastapi uvicorn
-weight: 500;">pip -weight: 500;">install fastapi uvicorn
-weight: 500;">pip -weight: 500;">install fastapi uvicorn
from fastapi import FastAPI
from pydantic import BaseModel app = FastAPI(title="My API", version="1.0.0") class Item(BaseModel): name: str price: float in_stock: bool = True @app.get("/")
async def root(): return {"message": "Hello World", "docs": "/docs"} @app.get("/items/{item_id}")
async def get_item(item_id: int): return {"item_id": item_id, "name": f"Item {item_id}"} @app.post("/items")
async def create_item(item: Item): return {"created": item.name, "price": item.price}
from fastapi import FastAPI
from pydantic import BaseModel app = FastAPI(title="My API", version="1.0.0") class Item(BaseModel): name: str price: float in_stock: bool = True @app.get("/")
async def root(): return {"message": "Hello World", "docs": "/docs"} @app.get("/items/{item_id}")
async def get_item(item_id: int): return {"item_id": item_id, "name": f"Item {item_id}"} @app.post("/items")
async def create_item(item: Item): return {"created": item.name, "price": item.price}
from fastapi import FastAPI
from pydantic import BaseModel app = FastAPI(title="My API", version="1.0.0") class Item(BaseModel): name: str price: float in_stock: bool = True @app.get("/")
async def root(): return {"message": "Hello World", "docs": "/docs"} @app.get("/items/{item_id}")
async def get_item(item_id: int): return {"item_id": item_id, "name": f"Item {item_id}"} @app.post("/items")
async def create_item(item: Item): return {"created": item.name, "price": item.price}
uvicorn main:app --reload --host 0.0.0.0 --port 8000
uvicorn main:app --reload --host 0.0.0.0 --port 8000
uvicorn main:app --reload --host 0.0.0.0 --port 8000
{ "detail": [ { "loc": ["body", "price"], "msg": "value is not a valid float", "type": "type_error.float" } ]
}
{ "detail": [ { "loc": ["body", "price"], "msg": "value is not a valid float", "type": "type_error.float" } ]
}
{ "detail": [ { "loc": ["body", "price"], "msg": "value is not a valid float", "type": "type_error.float" } ]
}
import httpx @app.get("/weather/{city}")
async def get_weather(city: str): async with httpx.AsyncClient() as client: resp = await client.get(f"https://api.weather.com/{city}") return resp.json()
import httpx @app.get("/weather/{city}")
async def get_weather(city: str): async with httpx.AsyncClient() as client: resp = await client.get(f"https://api.weather.com/{city}") return resp.json()
import httpx @app.get("/weather/{city}")
async def get_weather(city: str): async with httpx.AsyncClient() as client: resp = await client.get(f"https://api.weather.com/{city}") return resp.json()
from fastapi import Depends, HTTPException, Header async def verify_token(x_token: str = Header(...)): if x_token != "my-secret": raise HTTPException(status_code=400, detail="Invalid token") return x_token @app.get("/protected")
async def protected(token: str = Depends(verify_token)): return {"message": "Access granted"}
from fastapi import Depends, HTTPException, Header async def verify_token(x_token: str = Header(...)): if x_token != "my-secret": raise HTTPException(status_code=400, detail="Invalid token") return x_token @app.get("/protected")
async def protected(token: str = Depends(verify_token)): return {"message": "Access granted"}
from fastapi import Depends, HTTPException, Header async def verify_token(x_token: str = Header(...)): if x_token != "my-secret": raise HTTPException(status_code=400, detail="Invalid token") return x_token @app.get("/protected")
async def protected(token: str = Depends(verify_token)): return {"message": "Access granted"}
-weight: 500;">pip -weight: 500;">install sqlalchemy aiomysql python-jose passlib[bcrypt]
-weight: 500;">pip -weight: 500;">install sqlalchemy aiomysql python-jose passlib[bcrypt]
-weight: 500;">pip -weight: 500;">install sqlalchemy aiomysql python-jose passlib[bcrypt]
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker DATABASE_URL = "sqlite:///./app.db"
engine = create_engine(DATABASE_URL)
SessionLocal = sessionmaker(bind=engine)
Base = declarative_base() class User(Base): __tablename__ = "users" id = Column(Integer, primary_key=True, index=True) username = Column(String, unique=True, index=True) email = Column(String, unique=True, index=True) Base.metadata.create_all(bind=engine)
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker DATABASE_URL = "sqlite:///./app.db"
engine = create_engine(DATABASE_URL)
SessionLocal = sessionmaker(bind=engine)
Base = declarative_base() class User(Base): __tablename__ = "users" id = Column(Integer, primary_key=True, index=True) username = Column(String, unique=True, index=True) email = Column(String, unique=True, index=True) Base.metadata.create_all(bind=engine)
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker DATABASE_URL = "sqlite:///./app.db"
engine = create_engine(DATABASE_URL)
SessionLocal = sessionmaker(bind=engine)
Base = declarative_base() class User(Base): __tablename__ = "users" id = Column(Integer, primary_key=True, index=True) username = Column(String, unique=True, index=True) email = Column(String, unique=True, index=True) Base.metadata.create_all(bind=engine)
FROM python:3.12-slim
WORKDIR /app
COPY requirements.txt .
RUN -weight: 500;">pip -weight: 500;">install --no-cache-dir -r requirements.txt
COPY . .
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
FROM python:3.12-slim
WORKDIR /app
COPY requirements.txt .
RUN -weight: 500;">pip -weight: 500;">install --no-cache-dir -r requirements.txt
COPY . .
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
FROM python:3.12-slim
WORKDIR /app
COPY requirements.txt .
RUN -weight: 500;">pip -weight: 500;">install --no-cache-dir -r requirements.txt
COPY . .
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"] - Swagger UI at /docs
- ReDoc at /redoc
- OpenAPI JSON at /openapi.json - CORS Middleware — app.add_middleware(CORSMiddleware, ...)
- Environment Variables — Use pydantic-settings for config
- Error Handlers — Custom exception classes
- Logging — Structured JSON logs with structlog
- Health Check — /health endpoint for monitoring
- Rate Limiting — Use slowapi middleware
- Docker — Multi-stage build for small images - You need a full admin panel → Use Django
- You're building a simple microservice with 1 endpoint → Flask is fine
- Your team has zero Python experience → Consider NestJS or Express
