110 lines
5.1 KiB
Python
110 lines
5.1 KiB
Python
import json
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from collections import defaultdict
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def load_sales(file_path: str) -> list:
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"""Читает JSON из файла и возвращает список продаж."""
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try:
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with open(file_path, 'r', encoding='utf-8') as f:
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return json.load(f)
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except FileNotFoundError:
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print(f"Ошибка: файл {file_path} не найден.")
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return []
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except json.JSONDecodeError:
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print(f"Ошибка: некорректный формат JSON в файле {file_path}.")
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return []
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def calculate_revenue(sales: list) -> float:
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"""Вычисляет общую выручку."""
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total_revenue = 0
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for sale in sales:
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revenue = sale.get('price', 0) * sale.get('quantity', 0)
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total_revenue += revenue
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return total_revenue
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def get_top_category(sales: list) -> str:
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"""Определяет категорию с наибольшей выручкой."""
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category_revenue = defaultdict(float)
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for sale in sales:
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revenue = sale.get('price', 0) * sale.get('quantity', 0)
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category_revenue[sale.get('category', 'Unknown')] += revenue
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if not category_revenue:
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return "Нет данных"
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return max(category_revenue, key=category_revenue.get)
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def filter_by_date(sales: list, date: str) -> list:
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"""Возвращает продажи за указанную дату."""
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result = []
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for sale in sales:
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if sale.get('date') == date:
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result.append(sale)
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return result
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def get_average_price(sales: list) -> float:
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"""Вычисляет среднюю цену товара."""
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try:
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return sum(sale.get('price', 0) for sale in sales) / len(sales)
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except ZeroDivisionError:
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return 0.0
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def find_best_selling_product(sales: list) -> dict:
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"""Находит товар с максимальным количеством проданных единиц."""
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product_quantity = defaultdict(int)
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for sale in sales:
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product_name = sale.get('product')
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quantity = sale.get('quantity')
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if product_name and isinstance(quantity, (int, float)) and quantity > 0:
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product_quantity[product_name] += quantity
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if not product_quantity:
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return {"product": "Нет данных", "quantity": 0}
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best_product_name = max(product_quantity, key=product_quantity.get)
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return {"product": best_product_name, "quantity": product_quantity[best_product_name]}
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def count_products_by_category(sales: list) -> dict:
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"""Подсчитывает количество уникальных товаров в каждой категории."""
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result = {}
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for sale in sales:
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category = sale.get('category', 'Unknown')
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product = sale.get('product', 'Unknown Product')
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if category not in result:
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result[category] = []
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if product not in result[category]:
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result[category].append(product)
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return {cat: len(prods) for cat, prods in result.items()}
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def get_daily_sales_stats(sales: list) -> dict:
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"""Возвращает словарь с датами и общей выручкой за каждый день."""
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daily_revenue = {}
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for sale in sales:
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revenue = sale.get('price', 0) * sale.get('quantity', 0)
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date = sale.get('date', 'Unknown Date')
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daily_revenue[date] = daily_revenue.get(date, 0) + revenue
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return daily_revenue
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def add_sale(sales: list, category: str, product: str, price: float, quantity: int, date: str) -> list:
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"""Добавляет новую продажу."""
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new_id = max([sale.get('id', 0) for sale in sales], default=0) + 1
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new_sale = {
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"id": new_id,
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"category": category,
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"product": product,
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"price": price,
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"quantity": quantity,
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"date": date
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}
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sales.append(new_sale)
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return sales
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def generate_sales_report(sales: list, output_file: str) -> None:
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"""Формирует и сохраняет отчёт в файл."""
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total_revenue = calculate_revenue(sales)
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top_category = get_top_category(sales)
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best_selling_product = find_best_selling_product(sales)
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daily_stats = get_daily_sales_stats(sales)
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products_by_category = count_products_by_category(sales)
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average_price = get_average_price(sales)
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report_data = {
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"общая выручка": round(total_revenue, 2),
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"категорию с наибольшими продажами": top_category,
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"самый продаваемый товар": best_selling_product,
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"продажи по дням": daily_stats,
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"количество уникальных товаров": products_by_category,
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"среднюю цену товара": round(average_price, 2),
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"число продаж": len(sales)
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}
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try:
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with open(output_file, 'w', encoding='utf-8') as f:
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json.dump(report_data, f, indent=4, ensure_ascii=False)
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print(f"Отчёт сохранен в файл: {output_file}")
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except IOError:
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print(f"Ошибка: не удалось записать в файл {output_file}.") |