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292 changes: 290 additions & 2 deletions lab-python-error-handling.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -72,11 +72,299 @@
"\n",
"4. Test your code by running the program and deliberately entering invalid quantities and product names. Make sure the error handling mechanism works as expected.\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "20f5f944",
"metadata": {},
"outputs": [],
"source": [
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"inventory = {}\n",
"costumer_orders = set()\n",
"\n",
"def initialize_inv(products):\n",
" \"\"\" It will prompt a inventory initializer, where you will have to enter the initial quantities for the items in {products}\"\"\"\n",
" inventory = {product:int(input(f\"Insert the quantity of {product}\")) for product in products}\n",
" return print(inventory)\n",
"\n",
"\n",
"initialize_inv(products)\n",
"\n",
"def get_costumer_orders():\n",
" order_number = input(\"Insert the number of orders to process:\")\n",
" ordered ={costumer_orders.add(input(\"Enter the name of the product you want to order\")) for i in range(int(order_number))}\n",
" return ordered\n",
"\n",
"get_costumer_orders()\n",
"\n",
"def update_inventory(costumer_orders, inventory):\n",
" \"\"\"It will update the inventory based on the costumer orders\"\"\"\n",
" inventory = {name: inventory[name] - 1 for name in costumer_orders if inventory[name] > 0}\n",
" \n",
" return print(inventory)\n",
" \n",
"\n",
"price = {}\n",
"\n",
"def order_price(product, price):\n",
" \"\"\"It will return the price of the ordered product\"\"\"\n",
" price = {product: int(input(f\"How much does {product} cost?\")) for product in costumer_orders}\n",
" total_price = sum(price.values())\n",
" print(f\"The total price of the order is: {total_price}\")\n",
" return total_price\n",
"\n",
"order_price(products, price)\n",
"\n",
"def calculate_order_statistics(costumer_orders, products):\n",
" print(\"Order Statistics:\")\n",
" total_orders = len(costumer_orders)\n",
" print(f\"Total Products Ordered: {total_orders}\")\n",
" unique_products = len(products)\n",
" total_unique = (total_orders / unique_products) * 100\n",
" print(f\"Percentage of Products Ordered: {int(total_unique)}%\")\n",
"\n",
" return total_orders, total_unique\n",
"\n",
"calculate_order_statistics(costumer_orders, products)\n",
"\n",
"def print_order_statistics(order_statistics):\n",
" total_orders, total_unique = order_statistics\n",
" print(\"Order Statistics:\")\n",
" print(f\"Total Products Ordered: {total_orders}\")\n",
" print(f\"Percentage of Products Ordered: {int(total_unique)}%\")\n",
" return total_orders, total_unique\n",
"\n",
"\n",
"def print_updated_inventory(inventory):\n",
" \"\"\"It will print the updated inventory report\"\"\"\n",
" print(\"Updated Inventory:\")\n",
" [print(f\"Inventory of {item} : {inventory[item]}\") for item in inventory]\n",
" return inventory\n",
"\n",
" \n",
"\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "e5962560",
"metadata": {},
"outputs": [],
"source": [
"\"\"\"\"Calculate Total price\"\"\"\n",
"\n",
"price = {}\n",
"\n",
"def order_price(product, price):\n",
" \"\"\"It will return the price of the ordered product\"\"\"\n",
" price = {product: int(input(f\"How much does {product} cost?\")) for product in costumer_orders}\n",
" total_price = sum(price.values())\n",
" print(f\"The total price of the order is: {total_price}\")\n",
" return total_price\n",
"\n",
"order_price(products, price)"
]
},
{
"cell_type": "code",
"execution_count": 19,
"id": "9c793b74",
"metadata": {},
"outputs": [],
"source": [
"def calculate_total_price(items):\n",
" item_prices = {}\n",
" \n",
" for item in items:\n",
" while True:\n",
" try:\n",
" cost = int(input(f\"Quanto custa o item '{item}'? \"))\n",
" if cost < 0:\n",
" print(\"Erro: O preço não pode ser negativo. Tente novamente.\")\n",
" item_prices[item] = cost\n",
" except ValueError:\n",
" print(\"Erro: Entrada inválida. Por favor, digite apenas números inteiros.\")\n",
"\n",
" total_price = sum(item_prices.values())\n",
" print(f\"Total: {total_price}\")\n",
" \n",
" return total_price"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "3377ebb5",
"metadata": {},
"outputs": [],
"source": [
"\"\"\"Get_costumer_orders\"\"\"\n",
"def get_customer_orders(inventory):\n",
" while True:\n",
" try:\n",
" order_number = int(input(\"Insira o número de produtos a encomendar: \"))\n",
" if order_number < 0:\n",
" print(\"Erro: O número de pedidos não pode ser negativo.\")\n",
" except ValueError:\n",
" print(\"Erro: Entrada inválida. Por favor, insira um número inteiro.\")\n",
" customer_orders = []\n",
" for i in range(order_number):\n",
" while True:\n",
" try:\n",
" product_name = input(f\"Produto {i+1}: \").strip()\n",
" if product_name not in inventory:\n",
" raise KeyError(f\"O produto '{product_name}' não existe no nosso inventário.\")\n",
" if inventory[product_name] <= 0:\n",
" raise ValueError(f\"O produto '{product_name}' está esgotado.\")\n",
" customer_orders.append(product_name)\n",
" except (KeyError, ValueError) as e:\n",
" print(f\"Erro: {e} Tente novamente.\")\n",
"\n",
" return customer_orders\n",
"\n",
"get_customer_orders(inventory)"
]
},
{
"cell_type": "code",
"execution_count": 23,
"id": "79f49742",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"\n",
"--- Inicialização do Inventário ---\n",
"\n",
"--- Definição de Preços ---\n",
"Erro: O preço deve ser positivo.\n",
"Erro: O preço deve ser positivo.\n",
"Erro: Insira um número inteiro.\n",
"\n",
"Preço Total do Pedido: 70\n",
"\n",
"--- Estatísticas do Pedido ---\n",
"Total de itens pedidos: 2\n",
"Percentagem do catálogo requisitada: 40%\n",
"\n",
"--- Inventário Atualizado ---\n",
"Stock de t-shirt: 30\n",
"Stock de mug: 29\n",
"Stock de hat: 29\n",
"Stock de book: 30\n",
"Stock de keychain: 30\n"
]
}
],
"source": [
"\"\"\"código atualizado\"\"\"\n",
"\n",
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
"\n",
"def initialize_inv(products):\n",
" \"\"\"Inicializa o inventário com as quantidades fornecidas pelo utilizador.\"\"\"\n",
" print(\"\\n--- Inicialização do Inventário ---\")\n",
" # Retornamos o dicionário para ser guardado numa variável\n",
" return {product: int(input(f\"Quantidade inicial de {product}: \")) for product in products}\n",
"\n",
"def get_customer_orders(inventory):\n",
" \"\"\"Recolhe os pedidos validando stock e existência.\"\"\"\n",
" while True:\n",
" try:\n",
" order_number = int(input(\"\\nQuantos produtos deseja encomendar? \"))\n",
" if order_number >= 0:\n",
" break # Importante: Sair do loop se o valor for válido\n",
" print(\"Erro: O número não pode ser negativo.\")\n",
" except ValueError:\n",
" print(\"Erro: Insira um número inteiro válido.\")\n",
"\n",
" customer_orders = []\n",
" for i in range(order_number):\n",
" while True:\n",
" try:\n",
" product_name = input(f\"Produto {i+1}: \").strip().lower()\n",
" if product_name not in inventory:\n",
" raise KeyError(f\"O produto '{product_name}' não existe.\")\n",
" if inventory[product_name] <= 0:\n",
" raise ValueError(f\"O produto '{product_name}' está esgotado.\")\n",
" \n",
" customer_orders.append(product_name)\n",
" # Opcional: reduzir stock imediatamente aqui ou na função própria\n",
" break\n",
" except (KeyError, ValueError) as e:\n",
" print(f\"Erro: {e} Tente novamente.\")\n",
" return customer_orders\n",
"\n",
"def update_inventory(customer_orders, inventory):\n",
" \"\"\"Atualiza o inventário subtraindo os itens pedidos.\"\"\"\n",
" for item in customer_orders:\n",
" if inventory[item] > 0:\n",
" inventory[item] -= 1\n",
" return inventory\n",
"\n",
"def calculate_total_price(items_ordered):\n",
" \"\"\"Calcula o preço total com base nos itens realmente pedidos.\"\"\"\n",
" print(\"\\n--- Definição de Preços ---\")\n",
" item_prices = {}\n",
" # Usamos set() para não perguntar o preço do mesmo item duas vezes\n",
" for item in set(items_ordered):\n",
" while True:\n",
" try:\n",
" cost = int(input(f\"Preço unitário de '{item}': \"))\n",
" if cost >= 0:\n",
" item_prices[item] = cost\n",
" break\n",
" print(\"Erro: O preço deve ser positivo.\")\n",
" except ValueError:\n",
" print(\"Erro: Insira um número inteiro.\")\n",
" \n",
" total = sum(item_prices[item] for item in items_ordered)\n",
" print(f\"\\nPreço Total do Pedido: {total}\")\n",
" return total\n",
"\n",
"def print_order_statistics(customer_orders, products):\n",
" \"\"\"Calcula e exibe estatísticas do pedido.\"\"\"\n",
" print(\"\\n--- Estatísticas do Pedido ---\")\n",
" total_ordered = len(customer_orders)\n",
" unique_ordered = len(set(customer_orders))\n",
" total_catalog = len(products)\n",
" \n",
" percentage = (unique_ordered / total_catalog) * 100\n",
" print(f\"Total de itens pedidos: {total_ordered}\")\n",
" print(f\"Percentagem do catálogo requisitada: {int(percentage)}%\")\n",
"\n",
"def print_updated_inventory(inventory):\n",
" \"\"\"Exibe o estado final do stock.\"\"\"\n",
" print(\"\\n--- Inventário Atualizado ---\")\n",
" for item, qty in inventory.items():\n",
" print(f\"Stock de {item}: {qty}\")\n",
"\n",
"\n",
"current_inventory = initialize_inv(products)\n",
"orders = get_customer_orders(current_inventory)\n",
"current_inventory = update_inventory(orders, current_inventory)\n",
"total_pago = calculate_total_price(orders)\n",
"print_order_statistics(orders, products)\n",
"print_updated_inventory(current_inventory)"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "e8137279",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "base",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +378,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
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