1 задание

1zadanie.py

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+# Практическая работа
+# Тема: Обработка данных интернет-магазина
+
+
+def load_products_from_file(filepath):
+    products = []
+
+    try:
+        file = open(filepath, "r", encoding="utf-8")
+
+        for line in file:
+            line = line.strip()
+
+            if line == "":
+                continue
+
+            parts = line.split(";")
+
+            if len(parts) != 6:
+                continue
+
+            try:
+                product = {
+                    "id": int(parts[0]),
+                    "name": parts[1],
+                    "category": parts[2],
+                    "price": float(parts[3]),
+                    "quantity": int(parts[4]),
+                    "description": parts[5]
+                }
+                products.append(product)
+            except:
+                continue
+
+        file.close()
+
+    except FileNotFoundError:
+        print("Файл не найден")
+    except:
+        print("Ошибка при чтении файла")
+
+    return products
+
+
+def validate_product(product):
+    if "id" not in product:
+        return False
+    if "name" not in product:
+        return False
+    if "category" not in product:
+        return False
+    if "price" not in product:
+        return False
+    if "quantity" not in product:
+        return False
+    if "description" not in product:
+        return False
+
+    if product["name"].strip() == "":
+        return False
+    if product["category"].strip() == "":
+        return False
+    if product["price"] < 0:
+        return False
+    if product["quantity"] < 0:
+        return False
+
+    return True
+
+
+def filter_products_by_category(products, category):
+    result = []
+
+    for product in products:
+        if product["category"].lower() == category.lower():
+            result.append(product)
+
+    return result
+
+
+def search_products_by_keyword(products, keyword):
+    result = []
+
+    for product in products:
+        text = product["name"] + " " + product["description"]
+
+        if keyword.lower() in text.lower():
+            result.append(product)
+
+    return result
+
+
+def sort_products_by_price(products, descending=False):
+    return sorted(products, key=lambda x: x["price"], reverse=descending)
+
+
+def calculate_discounted_price(price, discount_percent):
+    new_price = price - price * discount_percent / 100
+    return round(new_price, 2)
+
+
+def build_cart(products, product_ids):
+    cart = []
+
+    for product_id in product_ids:
+        for product in products:
+            if product["id"] == product_id:
+                cart.append(product)
+                break
+
+    return cart
+
+
+def calculate_cart_total(cart, discounts=None):
+    total = 0
+
+    for product in cart:
+        current_price = product["price"]
+
+        if discounts is not None:
+            if product["id"] in discounts:
+                current_price = calculate_discounted_price(current_price, discounts[product["id"]])
+            elif product["category"] in discounts:
+                current_price = calculate_discounted_price(current_price, discounts[product["category"]])
+
+        total += current_price
+
+    return round(total, 2)
+
+
+def group_products_by_category(products):
+    groups = {}
+
+    for product in products:
+        category = product["category"]
+
+        if category not in groups:
+            groups[category] = []
+
+        groups[category].append(product)
+
+    return groups
+
+
+def generate_order_report(cart, total_cost):
+    report = "Отчет по заказу\n"
+    report += "-------------------------\n"
+
+    number = 1
+    for product in cart:
+        report += str(number) + ". " + product["name"] + " - " + str(product["price"]) + " руб.\n"
+        number += 1
+
+    report += "-------------------------\n"
+    report += "Количество товаров: " + str(len(cart)) + "\n"
+    report += "Итоговая стоимость: " + str(total_cost) + " руб.\n"
+
+    return report
+
+
+def main():
+    products = load_products_from_file("data.txt")
+
+    print("Загруженные товары:")
+    for product in products:
+        print(product)
+
+    valid_products = []
+    invalid_products = []
+
+    for product in products:
+        if validate_product(product):
+            valid_products.append(product)
+        else:
+            invalid_products.append(product)
+
+    print()
+    print("Корректных товаров:", len(valid_products))
+    print("Некорректных товаров:", len(invalid_products))
+
+    filtered_products = filter_products_by_category(valid_products, "Электроника")
+    print()
+    print("Товары категории Электроника:")
+    for product in filtered_products:
+        print(product["name"], "-", product["price"], "руб.")
+
+    found_products = search_products_by_keyword(valid_products, "игровой")
+    print()
+    print("Поиск по слову 'игровой':")
+    for product in found_products:
+        print(product["name"], "-", product["description"])
+
+    sorted_products = sort_products_by_price(found_products)
+    print()
+    print("После сортировки по цене:")
+    for product in sorted_products:
+        print(product["name"], "-", product["price"], "руб.")
+
+    if len(valid_products) > 0:
+        old_price = valid_products[0]["price"]
+        new_price = calculate_discounted_price(old_price, 10)
+
+        print()
+        print("Пример расчета скидки:")
+        print("Старая цена:", old_price)
+        print("Новая цена:", new_price)
+
+    cart = build_cart(valid_products, [1, 3, 5])
+    print()
+    print("Корзина:")
+    for product in cart:
+        print(product["name"], "-", product["price"], "руб.")
+
+    discounts = {
+        1: 10,
+        "Электроника": 5
+    }
+
+    total_cost = calculate_cart_total(cart, discounts)
+    print()
+    print("Итоговая стоимость корзины:", total_cost, "руб.")
+
+    groups = group_products_by_category(valid_products)
+    print()
+    print("Группировка товаров по категориям:")
+    for category in groups:
+        print(category, "-", len(groups[category]), "товаров")
+
+    report = generate_order_report(cart, total_cost)
+    print()
+    print(report)
+
+
+if __name__ == "__main__":
+    main()

README.md

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+1 задание по учебной практике

data.txt

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+1;Ноутбук Lenovo;Электроника;55000;10;Игровой ноутбук с мощной видеокартой
+2;Мышь Logitech;Электроника;2500;25;Беспроводная мышь для работы
+3;Клавиатура Redragon;Электроника;3200;15;Механическая игровая клавиатура
+4;Рюкзак Xiaomi;Аксессуары;2800;12;Городской рюкзак для ноутбука
+5;Наушники JBL;Электроника;4700;8;Беспроводные наушники с хорошим звуком
+6;Блокнот;Канцтовары;150;40;Тетрадь для записей