python

from abc import ABC, abstractmethod


class UnknownChannel(Exception):
    pass

from sklearn.compose import ColumnTransformer
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.impute import SimpleImputer
from sklearn.pipeline import Pipeline
from sklearn.preprocessing import OneHotEncoder, StandardScaler
from sklearn.ensemble import RandomForestClassifier

import asyncio
import time
from dataclasses import dataclass, field


@dataclass

import pandas as pd

df = pd.read_csv(
    'orders.csv',
    parse_dates=['created_at'],
    dtype={

from django.db import models


class Post(models.Model):
    title = models.CharField(max_length=200)
    content = models.TextField()

import base64
import json
from datetime import datetime
from typing import Optional, Tuple

import matplotlib.pyplot as plt
import pandas as pd
import seaborn as sns

sns.set_theme(style='whitegrid', palette='deep', context='talk')
plt.rcParams.update({

import abc
from typing import IO


class Exporter(abc.ABC):
    name: str = ""

from sqlalchemy import select

from .models import Order, db


def stream_orders(batch_size=1000):

from django.db import migrations


def populate_slugs(apps, schema_editor):
    """Generate slugs for existing posts."""
    Post = apps.get_model('blog', 'Post')

import random


class ReadWriteRouter:
    """Route reads to replicas, writes to primary."""

from blog.models import Post


# Load only specific fields
posts = Post.objects.only('id', 'title', 'published_at')
for post in posts: