From d446cb00a95fd7ce29e3ee5b384bd8619d3e1c3e Mon Sep 17 00:00:00 2001 From: DavyN25 Date: Sat, 13 Dec 2025 21:45:28 +0100 Subject: [PATCH] Solved lab --- ...lab-python-error-handling-checkpoint.ipynb | 358 ++++++++++++++++++ lab-python-error-handling.ipynb | 266 ++++++++++++- 2 files changed, 621 insertions(+), 3 deletions(-) create mode 100644 .ipynb_checkpoints/lab-python-error-handling-checkpoint.ipynb diff --git a/.ipynb_checkpoints/lab-python-error-handling-checkpoint.ipynb b/.ipynb_checkpoints/lab-python-error-handling-checkpoint.ipynb new file mode 100644 index 0000000..71fb50d --- /dev/null +++ b/.ipynb_checkpoints/lab-python-error-handling-checkpoint.ipynb @@ -0,0 +1,358 @@ +{ + "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": 1, + "id": "14a1fb09-2344-4c9e-9c99-09a05f34997c", + "metadata": {}, + "outputs": [], + "source": [ + "# 1. # Step 1: Define the function for initializing the inventory with error handling\n", + "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n", + "\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" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "id": "7379cf8a-7081-458b-801a-5d39e4b98092", + "metadata": {}, + "outputs": [], + "source": [ + "# 2. Modify the calculate_total_price function to include error handling\n", + "def calculate_total_price (customer_orders):\n", + " total_price = 0\n", + "\n", + " #loop for iterate on each product of the order\n", + " for product in customer_orders :\n", + " valid_price = False\n", + " while not valid_price :\n", + " \n", + " try:\n", + " # try to enter de price and store it only once\n", + " price = (float(input( f\"Enter the price of {product} : \")) )\n", + " if price < 0:\n", + " raise ValueError( \"the price cannot be negative. Please enter a valid price of product.\")\n", + " else :\n", + " valid_price = True\n", + " except ValueError:\n", + " print(\"invalid input. Error: {error}. Please enter a valid price of product.\")\n", + " total_price += price\n", + " \n", + " return total_price" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "id": "8f31cc0c-58bc-4c1e-bbfe-5d776423bb78", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of hat : 5\n", + "Enter the price of keychain : -2\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "invalid input. Error: {error}. Please enter a valid price of product.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of keychain : 4\n", + "Enter the price of t-shirt : hdf\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "invalid input. Error: {error}. Please enter a valid price of product.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of t-shirt : 3\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "Final Test Price: 12.0\n" + ] + } + ], + "source": [ + "# Exécution du Test\n", + "customer_orders_test = [\"hat\", \"keychain\", \"t-shirt\"]\n", + "final_price = calculate_total_price(customer_orders_test)\n", + "\n", + "print(f\"\\nFinal Test Price: {final_price:.1f}\")" + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "id": "fb8d2021-e5a7-49c8-8b08-272871a9504e", + "metadata": {}, + "outputs": [], + "source": [ + "# 3. Modify the get_customer_orders function to include error handling.\n", + "\n", + "\n", + "\n", + "def get_customer_orders(inventory): \n", + " customer_orders = []\n", + "\n", + " num_orders = -1\n", + " num_valid = False \n", + " while num_valid:\n", + " try:\n", + " num_orders_input = input(\"Enter the name of a product to order: \")\n", + " num_orders = int(num_orders_input)\n", + " if num_orders <0:\n", + " print(\"Error: The number of orders must be non-negative.\")\n", + " else :\n", + " num_valid = True\n", + " except ValueError:\n", + " print(\"Error: Invalid input. Please enter a valid non-numeric integer for the number of orders.\")\n", + " \n", + " # The enter and validation of each product\n", + " for i in range (num_orders):\n", + " order_valid = False\n", + " while not order_valid:\n", + " product_name = input (f\"Enter the name of product {i + 1}/{num_orders} to order: \").lower()\n", + " try:\n", + " product_name in inventory \n", + " except ValueError:\n", + " print (\"invalid input. Error: {error}.\")\n", + " try:\n", + " # valide the product name\n", + " if product_name not in inventory:\n", + " raise KeyError(f\"Product '{product_name}' not found in inventory.\")\n", + "\n", + " if inventory[product_name] <= 0:\n", + " raise ValueError(f\"Product '{product_name}' is out of stock.\")\n", + "\n", + " customer_orders.append(product_name)\n", + " order_valid = True\n", + " except KeyError as error:\n", + " # product name error or if the inventory is not well managed\n", + " print(f\"Invalid order: {error}. Please re-enter the product name.\")\n", + " \n", + " except ValueError as error:\n", + " # store error (quantity <= 0)\n", + " print(f\"Invalid order: {error}. Please re-enter the product name.\")\n", + " \n", + " return customer_orders" + ] + }, + { + "cell_type": "code", + "execution_count": 9, + "id": "006fe535-14df-40b2-829d-eae7facf634d", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Test of initialize inventory\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: -2\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error: Invalid quantity! Please enter a non-negative value.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 2 hat\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error: invalid literal for int() with base 10: '2 hat'\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 6\n", + "Enter the quantity of mugs available: 4\n", + "Enter the quantity of hats available: 5\n", + "Enter the quantity of books available: 2\n", + "Enter the quantity of keychains available: 4\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "Order entry test\n", + "\n", + "Results of test\n", + "inventory after the initialization: {'t-shirt': 6, 'mug': 4, 'hat': 5, 'book': 2, 'keychain': 4}\n", + "Valid orders entered: []\n" + ] + } + ], + "source": [ + "# 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", + "print(\"Test of initialize inventory\")\n", + "inventory = initialize_inventory(products)\n", + "\n", + "print()\n", + "print(\"Order entry test\")\n", + "customer_orders = get_customer_orders(inventory)\n", + "\n", + "print(\"\\nResults of test\")\n", + "print(f\"inventory after the initialization: {inventory}\")\n", + "print(f\"Valid orders entered: {customer_orders}\")" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "c2a8ed52-dbaf-41b0-a350-efc123487836", + "metadata": {}, + "outputs": [], + "source": [] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python [conda env:base] *", + "language": "python", + "name": "conda-base-py" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 3 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython3", + "version": "3.13.5" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +} diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb index f4c6ef6..71fb50d 100644 --- a/lab-python-error-handling.ipynb +++ b/lab-python-error-handling.ipynb @@ -72,13 +72,273 @@ "\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": 1, + "id": "14a1fb09-2344-4c9e-9c99-09a05f34997c", + "metadata": {}, + "outputs": [], + "source": [ + "# 1. # Step 1: Define the function for initializing the inventory with error handling\n", + "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n", + "\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" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "id": "7379cf8a-7081-458b-801a-5d39e4b98092", + "metadata": {}, + "outputs": [], + "source": [ + "# 2. Modify the calculate_total_price function to include error handling\n", + "def calculate_total_price (customer_orders):\n", + " total_price = 0\n", + "\n", + " #loop for iterate on each product of the order\n", + " for product in customer_orders :\n", + " valid_price = False\n", + " while not valid_price :\n", + " \n", + " try:\n", + " # try to enter de price and store it only once\n", + " price = (float(input( f\"Enter the price of {product} : \")) )\n", + " if price < 0:\n", + " raise ValueError( \"the price cannot be negative. Please enter a valid price of product.\")\n", + " else :\n", + " valid_price = True\n", + " except ValueError:\n", + " print(\"invalid input. Error: {error}. Please enter a valid price of product.\")\n", + " total_price += price\n", + " \n", + " return total_price" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "id": "8f31cc0c-58bc-4c1e-bbfe-5d776423bb78", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of hat : 5\n", + "Enter the price of keychain : -2\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "invalid input. Error: {error}. Please enter a valid price of product.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of keychain : 4\n", + "Enter the price of t-shirt : hdf\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "invalid input. Error: {error}. Please enter a valid price of product.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of t-shirt : 3\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "Final Test Price: 12.0\n" + ] + } + ], + "source": [ + "# Exécution du Test\n", + "customer_orders_test = [\"hat\", \"keychain\", \"t-shirt\"]\n", + "final_price = calculate_total_price(customer_orders_test)\n", + "\n", + "print(f\"\\nFinal Test Price: {final_price:.1f}\")" + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "id": "fb8d2021-e5a7-49c8-8b08-272871a9504e", + "metadata": {}, + "outputs": [], + "source": [ + "# 3. Modify the get_customer_orders function to include error handling.\n", + "\n", + "\n", + "\n", + "def get_customer_orders(inventory): \n", + " customer_orders = []\n", + "\n", + " num_orders = -1\n", + " num_valid = False \n", + " while num_valid:\n", + " try:\n", + " num_orders_input = input(\"Enter the name of a product to order: \")\n", + " num_orders = int(num_orders_input)\n", + " if num_orders <0:\n", + " print(\"Error: The number of orders must be non-negative.\")\n", + " else :\n", + " num_valid = True\n", + " except ValueError:\n", + " print(\"Error: Invalid input. Please enter a valid non-numeric integer for the number of orders.\")\n", + " \n", + " # The enter and validation of each product\n", + " for i in range (num_orders):\n", + " order_valid = False\n", + " while not order_valid:\n", + " product_name = input (f\"Enter the name of product {i + 1}/{num_orders} to order: \").lower()\n", + " try:\n", + " product_name in inventory \n", + " except ValueError:\n", + " print (\"invalid input. Error: {error}.\")\n", + " try:\n", + " # valide the product name\n", + " if product_name not in inventory:\n", + " raise KeyError(f\"Product '{product_name}' not found in inventory.\")\n", + "\n", + " if inventory[product_name] <= 0:\n", + " raise ValueError(f\"Product '{product_name}' is out of stock.\")\n", + "\n", + " customer_orders.append(product_name)\n", + " order_valid = True\n", + " except KeyError as error:\n", + " # product name error or if the inventory is not well managed\n", + " print(f\"Invalid order: {error}. Please re-enter the product name.\")\n", + " \n", + " except ValueError as error:\n", + " # store error (quantity <= 0)\n", + " print(f\"Invalid order: {error}. Please re-enter the product name.\")\n", + " \n", + " return customer_orders" + ] + }, + { + "cell_type": "code", + "execution_count": 9, + "id": "006fe535-14df-40b2-829d-eae7facf634d", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Test of initialize inventory\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: -2\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error: Invalid quantity! Please enter a non-negative value.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 2 hat\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error: invalid literal for int() with base 10: '2 hat'\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 6\n", + "Enter the quantity of mugs available: 4\n", + "Enter the quantity of hats available: 5\n", + "Enter the quantity of books available: 2\n", + "Enter the quantity of keychains available: 4\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "Order entry test\n", + "\n", + "Results of test\n", + "inventory after the initialization: {'t-shirt': 6, 'mug': 4, 'hat': 5, 'book': 2, 'keychain': 4}\n", + "Valid orders entered: []\n" + ] + } + ], + "source": [ + "# 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", + "print(\"Test of initialize inventory\")\n", + "inventory = initialize_inventory(products)\n", + "\n", + "print()\n", + "print(\"Order entry test\")\n", + "customer_orders = get_customer_orders(inventory)\n", + "\n", + "print(\"\\nResults of test\")\n", + "print(f\"inventory after the initialization: {inventory}\")\n", + "print(f\"Valid orders entered: {customer_orders}\")" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "c2a8ed52-dbaf-41b0-a350-efc123487836", + "metadata": {}, + "outputs": [], + "source": [] } ], "metadata": { "kernelspec": { - "display_name": "Python 3 (ipykernel)", + "display_name": "Python [conda env:base] *", "language": "python", - "name": "python3" + "name": "conda-base-py" }, "language_info": { "codemirror_mode": { @@ -90,7 +350,7 @@ "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython3", - "version": "3.9.13" + "version": "3.13.5" } }, "nbformat": 4,