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..2b7dbdf --- /dev/null +++ b/.ipynb_checkpoints/lab-python-error-handling-checkpoint.ipynb @@ -0,0 +1,386 @@ +{ + "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": "markdown", + "id": "a8ae339d-1806-45a0-a3a4-47850dc43df6", + "metadata": {}, + "source": [ + "1. Define the function for initializing the inventory with error handling" + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "id": "1a34bb37-3f22-4a28-bb80-f7ba7b1ec887", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 10\n", + "Enter the quantity of mugs available: 19\n", + "Enter the quantity of hats available: 10\n", + "Enter the quantity of books available: 10\n", + "Enter the quantity of keychains available: 10\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "['t-shirt', 'mug', 'hat', 'book', 'keychain']\n" + ] + } + ], + "source": [ + "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\n", + " \n", + "inventory = initialize_inventory(products)\n", + "print(products)" + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "id": "882807d3-ff8a-424f-af82-a370d7eb7894", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "['t-shirt', 'mug', 'hat', 'book', 'keychain']" + ] + }, + "execution_count": 6, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "products" + ] + }, + { + "cell_type": "code", + "execution_count": 9, + "id": "2c6ad392-42a1-49c1-9b91-65d9825f0951", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "{'t-shirt': 10, 'mug': 19, 'hat': 10, 'book': 10, 'keychain': 10}" + ] + }, + "execution_count": 9, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "inventory" + ] + }, + { + "cell_type": "markdown", + "id": "079f3c4d-c2de-4cf2-9cc5-219d7011da50", + "metadata": {}, + "source": [ + "2. Modify the calculate_total_price function to include error handling.\n", + "\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" + ] + }, + { + "cell_type": "code", + "execution_count": 10, + "id": "02fda518-d0ec-4721-bbe0-98a51a4e12d3", + "metadata": {}, + "outputs": [], + "source": [ + "total_products_ordered={'t-shirt': 3, 'mug': 1}" + ] + }, + { + "cell_type": "code", + "execution_count": 18, + "id": "ee5d6ead-5aa6-4191-9073-de3499ba55a2", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Unit price of t-shirt: 4\n", + "Unit price of mug: 5\n", + "Unit price of hat: 6\n", + "Unit price of book: 7\n", + "Unit price of keychain: 8\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "17\n", + "{'t-shirt': 4, 'mug': 5, 'hat': 6, 'book': 7, 'keychain': 8}\n" + ] + } + ], + "source": [ + "def calculate_order_price(inventory,total_products_ordered):\n", + " inventory_cost = {}\n", + " \n", + " for product in inventory:\n", + " isValid = False\n", + " while not isValid:\n", + " try:\n", + " price = int(input(f\"Unit price of {product}: \"))\n", + " if price < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " isValid = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " inventory_cost[product]= price\n", + "\n", + " cost_of_order = sum(inventory_cost[product] * quantity for product,quantity in total_products_ordered.items())\n", + " \n", + " return cost_of_order,inventory_cost\n", + "\n", + "cost_of_order, inventory_cost = calculate_order_price(inventory,total_products_ordered)\n", + "\n", + "print(cost_of_order)\n", + "print(inventory_cost)" + ] + }, + { + "cell_type": "markdown", + "id": "35cd3972-a91d-4d83-a608-b72826b7fb2b", + "metadata": {}, + "source": [ + "3. Modify the get_customer_orders function to include error handling.\n", + "\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" + ] + }, + { + "cell_type": "code", + "execution_count": 34, + "id": "b5e5fb0f-e2ac-4922-9937-b26df98fc2a2", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "How many different products would you like to order? 2\n", + "Enter product #1: pizza\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error: Invalid product. Choose from: t-shirt, mug, hat, book, keychain\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter product #1: t-shirt\n", + "Quantity: 3\n", + "Enter product #2: mug\n", + "Quantity: 1\n" + ] + } + ], + "source": [ + "def get_customer_orders():\n", + " total_products_ordered = {}\n", + "\n", + " #Ask for number of different items to order\n", + " isValid = False\n", + " while not isValid:\n", + " try:\n", + " num_orders = int(input(f\"How many different products would you like to order? \"))\n", + " if num_orders < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " isValid = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + "\n", + " #Get the number of items per desired product \n", + " for i in range(num_orders):\n", + " isValid = False\n", + " while not isValid:\n", + " try:\n", + " product = input(f\"Enter product #{i + 1}: \").strip().lower()\n", + " if product not in products:\n", + " raise ValueError(f\"Invalid product. Choose from: {', '.join(products)}\")\n", + " ordered_quantity = int(input(\"Quantity: \"))\n", + " if ordered_quantity < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " total_products_ordered[product] = ordered_quantity\n", + " isValid = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " \n", + " return total_products_ordered\n", + " \n", + "#num_orders= get_customer_orders()\n", + "total_products_ordered = get_customer_orders()" + ] + }, + { + "cell_type": "code", + "execution_count": 35, + "id": "fd09737b-0b7e-4cc6-a83d-5db811ba17ef", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "{'t-shirt': 3, 'mug': 1}" + ] + }, + "execution_count": 35, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "total_products_ordered" + ] + }, + { + "cell_type": "markdown", + "id": "268f3130-ac56-4522-af0f-a6c6e72bad68", + "metadata": {}, + "source": [ + "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." + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "75fa4f0e-b324-4efc-976e-a6f9c52c2a69", + "metadata": {}, + "outputs": [], + "source": [] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 3 (ipykernel)", + "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": "3.14.5" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +} diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb index f4c6ef6..2b7dbdf 100644 --- a/lab-python-error-handling.ipynb +++ b/lab-python-error-handling.ipynb @@ -72,6 +72,294 @@ "\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": "markdown", + "id": "a8ae339d-1806-45a0-a3a4-47850dc43df6", + "metadata": {}, + "source": [ + "1. Define the function for initializing the inventory with error handling" + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "id": "1a34bb37-3f22-4a28-bb80-f7ba7b1ec887", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 10\n", + "Enter the quantity of mugs available: 19\n", + "Enter the quantity of hats available: 10\n", + "Enter the quantity of books available: 10\n", + "Enter the quantity of keychains available: 10\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "['t-shirt', 'mug', 'hat', 'book', 'keychain']\n" + ] + } + ], + "source": [ + "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\n", + " \n", + "inventory = initialize_inventory(products)\n", + "print(products)" + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "id": "882807d3-ff8a-424f-af82-a370d7eb7894", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "['t-shirt', 'mug', 'hat', 'book', 'keychain']" + ] + }, + "execution_count": 6, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "products" + ] + }, + { + "cell_type": "code", + "execution_count": 9, + "id": "2c6ad392-42a1-49c1-9b91-65d9825f0951", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "{'t-shirt': 10, 'mug': 19, 'hat': 10, 'book': 10, 'keychain': 10}" + ] + }, + "execution_count": 9, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "inventory" + ] + }, + { + "cell_type": "markdown", + "id": "079f3c4d-c2de-4cf2-9cc5-219d7011da50", + "metadata": {}, + "source": [ + "2. Modify the calculate_total_price function to include error handling.\n", + "\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" + ] + }, + { + "cell_type": "code", + "execution_count": 10, + "id": "02fda518-d0ec-4721-bbe0-98a51a4e12d3", + "metadata": {}, + "outputs": [], + "source": [ + "total_products_ordered={'t-shirt': 3, 'mug': 1}" + ] + }, + { + "cell_type": "code", + "execution_count": 18, + "id": "ee5d6ead-5aa6-4191-9073-de3499ba55a2", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Unit price of t-shirt: 4\n", + "Unit price of mug: 5\n", + "Unit price of hat: 6\n", + "Unit price of book: 7\n", + "Unit price of keychain: 8\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "17\n", + "{'t-shirt': 4, 'mug': 5, 'hat': 6, 'book': 7, 'keychain': 8}\n" + ] + } + ], + "source": [ + "def calculate_order_price(inventory,total_products_ordered):\n", + " inventory_cost = {}\n", + " \n", + " for product in inventory:\n", + " isValid = False\n", + " while not isValid:\n", + " try:\n", + " price = int(input(f\"Unit price of {product}: \"))\n", + " if price < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " isValid = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " inventory_cost[product]= price\n", + "\n", + " cost_of_order = sum(inventory_cost[product] * quantity for product,quantity in total_products_ordered.items())\n", + " \n", + " return cost_of_order,inventory_cost\n", + "\n", + "cost_of_order, inventory_cost = calculate_order_price(inventory,total_products_ordered)\n", + "\n", + "print(cost_of_order)\n", + "print(inventory_cost)" + ] + }, + { + "cell_type": "markdown", + "id": "35cd3972-a91d-4d83-a608-b72826b7fb2b", + "metadata": {}, + "source": [ + "3. Modify the get_customer_orders function to include error handling.\n", + "\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" + ] + }, + { + "cell_type": "code", + "execution_count": 34, + "id": "b5e5fb0f-e2ac-4922-9937-b26df98fc2a2", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "How many different products would you like to order? 2\n", + "Enter product #1: pizza\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error: Invalid product. Choose from: t-shirt, mug, hat, book, keychain\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter product #1: t-shirt\n", + "Quantity: 3\n", + "Enter product #2: mug\n", + "Quantity: 1\n" + ] + } + ], + "source": [ + "def get_customer_orders():\n", + " total_products_ordered = {}\n", + "\n", + " #Ask for number of different items to order\n", + " isValid = False\n", + " while not isValid:\n", + " try:\n", + " num_orders = int(input(f\"How many different products would you like to order? \"))\n", + " if num_orders < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " isValid = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + "\n", + " #Get the number of items per desired product \n", + " for i in range(num_orders):\n", + " isValid = False\n", + " while not isValid:\n", + " try:\n", + " product = input(f\"Enter product #{i + 1}: \").strip().lower()\n", + " if product not in products:\n", + " raise ValueError(f\"Invalid product. Choose from: {', '.join(products)}\")\n", + " ordered_quantity = int(input(\"Quantity: \"))\n", + " if ordered_quantity < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " total_products_ordered[product] = ordered_quantity\n", + " isValid = True\n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " \n", + " return total_products_ordered\n", + " \n", + "#num_orders= get_customer_orders()\n", + "total_products_ordered = get_customer_orders()" + ] + }, + { + "cell_type": "code", + "execution_count": 35, + "id": "fd09737b-0b7e-4cc6-a83d-5db811ba17ef", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "{'t-shirt': 3, 'mug': 1}" + ] + }, + "execution_count": 35, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "total_products_ordered" + ] + }, + { + "cell_type": "markdown", + "id": "268f3130-ac56-4522-af0f-a6c6e72bad68", + "metadata": {}, + "source": [ + "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." + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "75fa4f0e-b324-4efc-976e-a6f9c52c2a69", + "metadata": {}, + "outputs": [], + "source": [] } ], "metadata": { @@ -90,7 +378,7 @@ "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython3", - "version": "3.9.13" + "version": "3.14.5" } }, "nbformat": 4,