diff --git a/lab-python-error-handling ejercicio.ipynb b/lab-python-error-handling ejercicio.ipynb new file mode 100644 index 0000000..c5b19f6 --- /dev/null +++ b/lab-python-error-handling ejercicio.ipynb @@ -0,0 +1,199 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "id": "25d7736c-ba17-4aff-b6bb-66eba20fbf4e", + "metadata": {}, + "source": [ + "# Lab | Error Handling" + ] + }, + { + "cell_type": "markdown", + "id": "bc99b386-7508-47a0-bcdb-d969deaf6c8b", + "metadata": {}, + "source": [ + "## Exercise: Error Handling for Managing Customer Orders\n", + "\n", + "The implementation of your code for managing customer orders assumes that the user will always enter a valid input. \n", + "\n", + "For example, we could modify the `initialize_inventory` function to include error handling.\n", + " - If the user enters an invalid quantity (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the quantity for that product.\n", + " - Use a try-except block to handle the error and continue prompting the user until a valid quantity is entered.\n", + "\n", + "```python\n", + "# Step 1: Define the function for initializing the inventory with error handling\n", + "def initialize_inventory(products):\n", + " inventory = {}\n", + " for product in products:\n", + " valid_quantity = False\n", + " while not valid_quantity:\n", + " try:\n", + " quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n", + " if quantity < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " valid_quantity = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " inventory[product] = quantity\n", + " return inventory\n", + "\n", + "# Or, in another way:\n", + "\n", + "def initialize_inventory(products):\n", + " inventory = {}\n", + " for product in products:\n", + " valid_input = False\n", + " while not valid_input:\n", + " try:\n", + " quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n", + " if quantity >= 0:\n", + " inventory[product] = quantity\n", + " valid_input = True\n", + " else:\n", + " print(\"Quantity cannot be negative. Please enter a valid quantity.\")\n", + " except ValueError:\n", + " print(\"Invalid input. Please enter a valid quantity.\")\n", + " return inventory\n", + "```\n", + "\n", + "Let's enhance your code by implementing error handling to handle invalid inputs.\n", + "\n", + "Follow the steps below to complete the exercise:\n", + "\n", + "2. Modify the `calculate_total_price` function to include error handling.\n", + " - If the user enters an invalid price (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the price for that product.\n", + " - Use a try-except block to handle the error and continue prompting the user until a valid price is entered.\n", + "\n", + "3. Modify the `get_customer_orders` function to include error handling.\n", + " - If the user enters an invalid number of orders (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the number of orders.\n", + " - If the user enters an invalid product name (e.g., a product name that is not in the inventory), or that doesn't have stock available, display an error message and ask them to re-enter the product name. *Hint: you will need to pass inventory as a parameter*\n", + " - Use a try-except block to handle the error and continue prompting the user until a valid product name is entered.\n", + "\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": "09d5632c", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error: invalid literal for int() with base 10: 'hola'\n", + "Error: invalid literal for int() with base 10: 'abc'\n", + "\n", + "Inventory: {'t-shirt': 9, 'mug': 0, 'hat': 8, 'book': 5, 'keychain': 6}\n", + "Error: invalid literal for int() with base 10: 'hola'\n", + "Error: 'mug' is out of stock.\n", + "\n", + "Customer Orders: {'book', 'hat'}\n", + "Error: could not convert string to float: 'hgi'\n", + "\n", + "Total Price: 23.90€\n" + ] + } + ], + "source": [ + "#Paso 1\n", + "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n", + "\n", + "#Paso 2\n", + "def initialize_inventory(products):\n", + " inventory = {}\n", + " for product in products:\n", + " valid_quantity = False\n", + " while not valid_quantity:\n", + " try:\n", + " quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n", + " if quantity < 0:\n", + " raise ValueError(\"Quantity cannot be negative.\")\n", + " valid_quantity = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " inventory[product] = quantity\n", + " return inventory\n", + "\n", + "#Paso 3\n", + "def get_customer_orders(inventory):\n", + " customer_orders = set()\n", + " valid_number = False\n", + " while not valid_number:\n", + " try:\n", + " num_orders = int(input(\"Enter the number of customer orders: \"))\n", + " if num_orders < 0:\n", + " raise ValueError(\"Number of orders cannot be negative.\")\n", + " valid_number = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " for _ in range(num_orders):\n", + " valid_product = False\n", + " while not valid_product:\n", + " try:\n", + " product = input(\"Enter the name of a product: \").strip().lower()\n", + " if product not in inventory:\n", + " raise ValueError(f\"'{product}' is not in the inventory. Available: {list(inventory.keys())}\")\n", + " if inventory[product] == 0: #Para fuera de stock\n", + " raise ValueError(f\"'{product}' is out of stock.\")\n", + " valid_product = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " customer_orders.add(product)\n", + " return customer_orders\n", + "\n", + "#Paso 4\n", + "def calculate_total_price(customer_orders):\n", + " total_price = []\n", + " for product in customer_orders:\n", + " valid_price = False\n", + " while not valid_price:\n", + " try:\n", + " price = float(input(f\"Enter the price of {product}: \"))\n", + " if price < 0:\n", + " raise ValueError(\"Price cannot be negative.\")\n", + " valid_price = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " total_price.append((product, price))\n", + " return total_price\n", + "\n", + "#Paso 4\n", + "inventory = initialize_inventory(products) #evitar entrada de string o cantidad negativa\n", + "print(\"\\nInventory:\", inventory)\n", + "\n", + "#Paso 5\n", + "customer_orders = get_customer_orders(inventory) # Para fuera de stock,inexistente o pedidos negativos\n", + "print(\"\\nCustomer Orders:\", customer_orders)\n", + "\n", + "#Paso 6\n", + "prices = calculate_total_price(customer_orders)# Para precios negativos o entrada de string en vez de float\n", + "total = sum(price for _, price in prices)\n", + "print(f\"\\nTotal Price: {total:.2f}€\")\n" + ] + } + ], + "metadata": { + "kernelspec": { + "display_name": "base", + "language": "python", + "name": "python3" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 3 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython3", + "version": "3.13.9" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +}