python

import os
from pathlib import Path

BASE_DIR = Path(__file__).resolve().parent.parent.parent

SECRET_KEY = os.environ.get('SECRET_KEY', 'dev-secret-key-change-in-production')

import django_filters
from .models import Product


class ProductFilter(django_filters.FilterSet):
    name = django_filters.CharFilter(lookup_expr='icontains')

import re


class APIVersionMiddleware:
    """Extract API version from request and add to request object."""

from typing import Literal, Tuple, Type

from pydantic import BaseModel, PostgresDsn, RedisDsn
from pydantic_settings import (
    BaseSettings,
    PydanticBaseSettingsSource,

import datetime
import jwt
from flask import current_app


class TokenError(Exception):

from sklearn.cluster import KMeans, DBSCAN, AgglomerativeClustering
from sklearn.metrics import silhouette_score
from sklearn.preprocessing import StandardScaler

X_scaled = StandardScaler().fit_transform(X)

from typing import Any, Optional

from fastapi.responses import JSONResponse
from pydantic import BaseModel

from typing import List, Optional

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from .dataloader import DataLoader

from django.db import models
from django.core.exceptions import ValidationError
from django.utils import timezone


class Event(models.Model):

# Find products with specific spec value
products = Product.objects.filter(specs__weight__gte=100)

# Check if JSON key exists
products = Product.objects.filter(specs__has_key='color')

import time
import threading
from collections import deque, defaultdict


class SlidingWindowLimiter:

from marshmallow import (
    Schema, fields, validates, validates_schema,
    ValidationError, RAISE,
)
from marshmallow.validate import Length, Email, Equal