codesnips

fastapi

python 
import joblib
import pandas as pd
from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI(title='Churn Prediction API')

Serving scikit-learn models behind a FastAPI prediction API

fastapi scikit-learn model-serving
by Dr. Elena Vasquez 1 tab
python 
from typing import Any, Optional

from fastapi.responses import JSONResponse
from pydantic import BaseModel

Consistent JSON Error Responses in FastAPI With a Custom Exception Handler

fastapi error-handling exceptions
by codesnips 3 tabs
python 
from typing import Optional
from pydantic import BaseModel, EmailStr, Field, field_validator, model_validator


class CreateUserRequest(BaseModel):
    model_config = {"extra": "forbid"}

Validating JSON Payloads with Pydantic v2 and Returning Field-Level Errors in FastAPI

fastapi pydantic validation
by codesnips 3 tabs
python 
import asyncio
import time
from dataclasses import dataclass, field


@dataclass

Per-Client Rate Limiting in FastAPI with a Token Bucket Dependency

python fastapi rate-limiting
by codesnips 3 tabs
python 
import base64
import json
from datetime import datetime
from typing import Optional, Tuple

Opaque Cursor Pagination for FastAPI Endpoints with SQLAlchemy

fastapi sqlalchemy pagination
by codesnips 3 tabs
python 
from sqlalchemy import select
from sqlalchemy.orm import Session

from .models import User

BATCH_SIZE = 1000

Stream a Large CSV Export in FastAPI With StreamingResponse and a Generator

fastapi streaming csv
by codesnips 3 tabs
python 
from datetime import datetime, timedelta, timezone

from jose import jwt, JWTError
from jose.exceptions import ExpiredSignatureError

SECRET_KEY = "change-me-in-production"

FastAPI JWT Authentication with Access/Refresh Tokens and a Verification Dependency

fastapi jwt authentication
by codesnips 3 tabs
lua 
-- KEYS[1] = bucket key
-- ARGV[1] = capacity, ARGV[2] = refill_per_sec, ARGV[3] = now (float seconds)
local capacity = tonumber(ARGV[1])
local rate = tonumber(ARGV[2])
local now = tonumber(ARGV[3])

Redis-Backed Token Bucket Rate Limiter as FastAPI Middleware

fastapi redis rate-limiting
by codesnips 4 tabs
python 
import enum
import datetime as dt

from sqlalchemy import Column, Integer, String, BigInteger, Enum, DateTime
from sqlalchemy.orm import declarative_base

Streaming FastAPI File Uploads with a Background Validation Task

fastapi uploads background-tasks
by codesnips 3 tabs
python 
import hmac
import hashlib
import time
from fastapi import Request, HTTPException, status

Verifying Stripe Webhook Signatures With a Reusable FastAPI Dependency

fastapi webhooks security
by codesnips 3 tabs