From e1f938281c5a3ddf51c701d5606b204e283fd3ef Mon Sep 17 00:00:00 2001 From: Charul Mathur Date: Wed, 26 Nov 2025 20:04:11 +0100 Subject: [PATCH] Day 4 Lab Solved --- ...lab-python-error-handling-checkpoint.ipynb | 391 ++++++++++++++++++ lab-python-error-handling.ipynb | 295 ++++++++++++- 2 files changed, 685 insertions(+), 1 deletion(-) 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..1d2588d --- /dev/null +++ b/.ipynb_checkpoints/lab-python-error-handling-checkpoint.ipynb @@ -0,0 +1,391 @@ +{ + "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": 68, + "id": "1cce3eb4-8c8d-4e4d-a6ae-1938d735facf", + "metadata": {}, + "outputs": [], + "source": [ + "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]" + ] + }, + { + "cell_type": "code", + "execution_count": 69, + "id": "ac015339-ffbc-43fb-96ad-bc68c6b143ae", + "metadata": {}, + "outputs": [], + "source": [ + "# Step 1: Define the function for initializing the inventory with error handling\n", + "\n", + "def initialize_inventory(products):\n", + " inventory = {}\n", + " \n", + " for product in products:\n", + " valid_quantity = False\n", + " \n", + " while not valid_quantity:\n", + " try:\n", + " quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n", + " \n", + " if quantity < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " \n", + " valid_quantity = True\n", + " \n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " \n", + " inventory[product] = quantity\n", + " return inventory" + ] + }, + { + "cell_type": "code", + "execution_count": 70, + "id": "d8c7db11-aee9-48be-8f27-70ca51b98398", + "metadata": {}, + "outputs": [], + "source": [ + "\n", + "def get_valid_orders():\n", + " while True:\n", + " try:\n", + " valid_orders = int(input(\"Enter the number of customer orders: \"))\n", + " \n", + " if valid_orders < 0:\n", + " print(\"Error: Order Number cannot be negative. Try Again!!\")\n", + " continue\n", + " return valid_orders\n", + " except ValueError:\n", + " print(\"Error: Please enter valid number of orders\")" + ] + }, + { + "cell_type": "code", + "execution_count": 71, + "id": "796eab51-237a-4b69-b06b-ac146e1ff0f5", + "metadata": {}, + "outputs": [], + "source": [ + "def get_valid_product(inventory):\n", + " while True:\n", + " product = input(\"Enter the product name that a customer wants to order: \").strip().lower()\n", + "\n", + " if product not in products:\n", + " print(\"Invalid Product. Choose from: \", products)\n", + " continue\n", + "\n", + " if inventory.get(product, 0) <= 0:\n", + " print(f\"Error: '{product}' is not in stock. Choose another product: \")\n", + " continue\n", + "\n", + " return product" + ] + }, + { + "cell_type": "code", + "execution_count": 72, + "id": "5a2de987-fea9-47d5-a0a7-d8698d101170", + "metadata": {}, + "outputs": [], + "source": [ + "def get_customer_orders(inventory):\n", + " num_orders = get_valid_orders()\n", + "\n", + " if num_orders == 0:\n", + " return set()\n", + "\n", + " orders = [get_valid_product(inventory) for _ in range(num_orders)]\n", + "\n", + " customer_orders = set(orders)\n", + " return customer_orders" + ] + }, + { + "cell_type": "code", + "execution_count": 73, + "id": "65212efb-03d0-43e0-b1c6-504f79c8970f", + "metadata": {}, + "outputs": [], + "source": [ + "def calculate_order_statistics(customer_orders, products):\n", + " total_products_ordered = len(customer_orders)\n", + "\n", + " if len(products) == 0:\n", + " percentage_ordered = 0\n", + " else:\n", + " percentage_ordered = (total_products_ordered / len(products)) * 100\n", + "\n", + " return total_products_ordered, percentage_ordered" + ] + }, + { + "cell_type": "code", + "execution_count": 74, + "id": "09c81448-cff1-4e4d-8fb2-fd6dfa9601d2", + "metadata": {}, + "outputs": [], + "source": [ + "def update_inventory(customer_orders, inventory):\n", + " \n", + " updated_inventory = {\n", + " product: quantity - (1 if product in customer_orders else 0)\n", + "\n", + " for product, quantity in inventory.items()\n", + "\n", + " if quantity - (1 if product in customer_orders else 0) > 0\n", + " }\n", + " return update_inventory" + ] + }, + { + "cell_type": "code", + "execution_count": 75, + "id": "bc161b13-c28e-4ea5-8c9e-d58953986c01", + "metadata": {}, + "outputs": [], + "source": [ + "def print_order_statistics(order_statistics):\n", + " \n", + " total_products_ordered, percentage_ordered = order_statistics\n", + " \n", + " print(\"\\nOrder statistics: \")\n", + " print(\"Total products ordered: \", total_products_ordered)\n", + " print(\"Percentage of products ordered: \", percentage_ordered)" + ] + }, + { + "cell_type": "code", + "execution_count": 80, + "id": "f49cb01d-de75-4864-99cb-b5fdf4419d69", + "metadata": {}, + "outputs": [], + "source": [ + "def print_updated_inventory(inventory):\n", + " print(\"\\nUpdated Inventory: \")\n", + " [print(f\"{product}: {quantity}\") for product, quantity in inventory.items()]" + ] + }, + { + "cell_type": "code", + "execution_count": 81, + "id": "0f551d37-8198-4490-930e-6faf24ba9179", + "metadata": {}, + "outputs": [], + "source": [ + "def get_valid_price(product):\n", + " \n", + " while True:\n", + " try:\n", + " price = float(input(f\"Enter the price of the {product}: \"))\n", + "\n", + " if price < 0:\n", + " print(\"Error: Price cannot be negative. Try again!!\")\n", + " continue\n", + " return price\n", + "\n", + " except ValueError:\n", + " print(\"Error: Please enter a valid numerical price: \")" + ] + }, + { + "cell_type": "code", + "execution_count": 82, + "id": "86d42222-f4b0-430e-9585-e60658a7f44d", + "metadata": {}, + "outputs": [], + "source": [ + "def calculate_total_price(customer_orders):\n", + " if not customer_orders:\n", + " return 0.0\n", + "\n", + " prices = {\n", + " product: get_valid_price(product)\n", + " for product in customer_orders\n", + " }\n", + " total_price = sum(prices.values())\n", + " return total_price" + ] + }, + { + "cell_type": "code", + "execution_count": 86, + "id": "c9b68a74-c134-48ff-8370-f9b6956a2897", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 1\n", + "Enter the quantity of mugs available: 2\n", + "Enter the quantity of hats available: 3\n", + "Enter the quantity of books available: 4\n", + "Enter the quantity of keychains available: 5\n", + "Enter the number of customer orders: 1\n", + "Enter the product name that a customer wants to order: mug\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "\n", + "Order statistics: \n", + "Total products ordered: 1\n", + "Percentage of products ordered: 20.0\n", + "dict_items([('t-shirt', 1), ('mug', 2), ('hat', 3), ('book', 4), ('keychain', 5)])\n", + "\n", + "Updated Inventory: \n", + "t-shirt: 1\n", + "mug: 2\n", + "hat: 3\n", + "book: 4\n", + "keychain: 5\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of the mug: 10\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Total Price: 10.0\n" + ] + } + ], + "source": [ + "def main():\n", + " inventory = initialize_inventory(products)\n", + "\n", + " customer_orders = get_customer_orders(inventory)\n", + "\n", + " order_stats = calculate_order_statistics(customer_orders, products)\n", + " print()\n", + " print_order_statistics(order_stats)\n", + "\n", + " print(inventory.items())\n", + "\n", + " update_inventory(customer_orders, inventory)\n", + " \n", + " print_updated_inventory(inventory)\n", + "\n", + " total_price = calculate_total_price(customer_orders)\n", + " print(\"Total Price: \", total_price)\n", + "\n", + "if __name__ == \"__main__\":\n", + " main()" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "274e92dd-ba10-437f-b881-b24cd7489a48", + "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": "3.13.5" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +} diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb index f4c6ef6..1d2588d 100644 --- a/lab-python-error-handling.ipynb +++ b/lab-python-error-handling.ipynb @@ -72,6 +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": 68, + "id": "1cce3eb4-8c8d-4e4d-a6ae-1938d735facf", + "metadata": {}, + "outputs": [], + "source": [ + "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]" + ] + }, + { + "cell_type": "code", + "execution_count": 69, + "id": "ac015339-ffbc-43fb-96ad-bc68c6b143ae", + "metadata": {}, + "outputs": [], + "source": [ + "# Step 1: Define the function for initializing the inventory with error handling\n", + "\n", + "def initialize_inventory(products):\n", + " inventory = {}\n", + " \n", + " for product in products:\n", + " valid_quantity = False\n", + " \n", + " while not valid_quantity:\n", + " try:\n", + " quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n", + " \n", + " if quantity < 0:\n", + " raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n", + " \n", + " valid_quantity = True\n", + " \n", + " except ValueError as error:\n", + " print(f\"Error: {error}\")\n", + " \n", + " inventory[product] = quantity\n", + " return inventory" + ] + }, + { + "cell_type": "code", + "execution_count": 70, + "id": "d8c7db11-aee9-48be-8f27-70ca51b98398", + "metadata": {}, + "outputs": [], + "source": [ + "\n", + "def get_valid_orders():\n", + " while True:\n", + " try:\n", + " valid_orders = int(input(\"Enter the number of customer orders: \"))\n", + " \n", + " if valid_orders < 0:\n", + " print(\"Error: Order Number cannot be negative. Try Again!!\")\n", + " continue\n", + " return valid_orders\n", + " except ValueError:\n", + " print(\"Error: Please enter valid number of orders\")" + ] + }, + { + "cell_type": "code", + "execution_count": 71, + "id": "796eab51-237a-4b69-b06b-ac146e1ff0f5", + "metadata": {}, + "outputs": [], + "source": [ + "def get_valid_product(inventory):\n", + " while True:\n", + " product = input(\"Enter the product name that a customer wants to order: \").strip().lower()\n", + "\n", + " if product not in products:\n", + " print(\"Invalid Product. Choose from: \", products)\n", + " continue\n", + "\n", + " if inventory.get(product, 0) <= 0:\n", + " print(f\"Error: '{product}' is not in stock. Choose another product: \")\n", + " continue\n", + "\n", + " return product" + ] + }, + { + "cell_type": "code", + "execution_count": 72, + "id": "5a2de987-fea9-47d5-a0a7-d8698d101170", + "metadata": {}, + "outputs": [], + "source": [ + "def get_customer_orders(inventory):\n", + " num_orders = get_valid_orders()\n", + "\n", + " if num_orders == 0:\n", + " return set()\n", + "\n", + " orders = [get_valid_product(inventory) for _ in range(num_orders)]\n", + "\n", + " customer_orders = set(orders)\n", + " return customer_orders" + ] + }, + { + "cell_type": "code", + "execution_count": 73, + "id": "65212efb-03d0-43e0-b1c6-504f79c8970f", + "metadata": {}, + "outputs": [], + "source": [ + "def calculate_order_statistics(customer_orders, products):\n", + " total_products_ordered = len(customer_orders)\n", + "\n", + " if len(products) == 0:\n", + " percentage_ordered = 0\n", + " else:\n", + " percentage_ordered = (total_products_ordered / len(products)) * 100\n", + "\n", + " return total_products_ordered, percentage_ordered" + ] + }, + { + "cell_type": "code", + "execution_count": 74, + "id": "09c81448-cff1-4e4d-8fb2-fd6dfa9601d2", + "metadata": {}, + "outputs": [], + "source": [ + "def update_inventory(customer_orders, inventory):\n", + " \n", + " updated_inventory = {\n", + " product: quantity - (1 if product in customer_orders else 0)\n", + "\n", + " for product, quantity in inventory.items()\n", + "\n", + " if quantity - (1 if product in customer_orders else 0) > 0\n", + " }\n", + " return update_inventory" + ] + }, + { + "cell_type": "code", + "execution_count": 75, + "id": "bc161b13-c28e-4ea5-8c9e-d58953986c01", + "metadata": {}, + "outputs": [], + "source": [ + "def print_order_statistics(order_statistics):\n", + " \n", + " total_products_ordered, percentage_ordered = order_statistics\n", + " \n", + " print(\"\\nOrder statistics: \")\n", + " print(\"Total products ordered: \", total_products_ordered)\n", + " print(\"Percentage of products ordered: \", percentage_ordered)" + ] + }, + { + "cell_type": "code", + "execution_count": 80, + "id": "f49cb01d-de75-4864-99cb-b5fdf4419d69", + "metadata": {}, + "outputs": [], + "source": [ + "def print_updated_inventory(inventory):\n", + " print(\"\\nUpdated Inventory: \")\n", + " [print(f\"{product}: {quantity}\") for product, quantity in inventory.items()]" + ] + }, + { + "cell_type": "code", + "execution_count": 81, + "id": "0f551d37-8198-4490-930e-6faf24ba9179", + "metadata": {}, + "outputs": [], + "source": [ + "def get_valid_price(product):\n", + " \n", + " while True:\n", + " try:\n", + " price = float(input(f\"Enter the price of the {product}: \"))\n", + "\n", + " if price < 0:\n", + " print(\"Error: Price cannot be negative. Try again!!\")\n", + " continue\n", + " return price\n", + "\n", + " except ValueError:\n", + " print(\"Error: Please enter a valid numerical price: \")" + ] + }, + { + "cell_type": "code", + "execution_count": 82, + "id": "86d42222-f4b0-430e-9585-e60658a7f44d", + "metadata": {}, + "outputs": [], + "source": [ + "def calculate_total_price(customer_orders):\n", + " if not customer_orders:\n", + " return 0.0\n", + "\n", + " prices = {\n", + " product: get_valid_price(product)\n", + " for product in customer_orders\n", + " }\n", + " total_price = sum(prices.values())\n", + " return total_price" + ] + }, + { + "cell_type": "code", + "execution_count": 86, + "id": "c9b68a74-c134-48ff-8370-f9b6956a2897", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 1\n", + "Enter the quantity of mugs available: 2\n", + "Enter the quantity of hats available: 3\n", + "Enter the quantity of books available: 4\n", + "Enter the quantity of keychains available: 5\n", + "Enter the number of customer orders: 1\n", + "Enter the product name that a customer wants to order: mug\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "\n", + "Order statistics: \n", + "Total products ordered: 1\n", + "Percentage of products ordered: 20.0\n", + "dict_items([('t-shirt', 1), ('mug', 2), ('hat', 3), ('book', 4), ('keychain', 5)])\n", + "\n", + "Updated Inventory: \n", + "t-shirt: 1\n", + "mug: 2\n", + "hat: 3\n", + "book: 4\n", + "keychain: 5\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of the mug: 10\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Total Price: 10.0\n" + ] + } + ], + "source": [ + "def main():\n", + " inventory = initialize_inventory(products)\n", + "\n", + " customer_orders = get_customer_orders(inventory)\n", + "\n", + " order_stats = calculate_order_statistics(customer_orders, products)\n", + " print()\n", + " print_order_statistics(order_stats)\n", + "\n", + " print(inventory.items())\n", + "\n", + " update_inventory(customer_orders, inventory)\n", + " \n", + " print_updated_inventory(inventory)\n", + "\n", + " total_price = calculate_total_price(customer_orders)\n", + " print(\"Total Price: \", total_price)\n", + "\n", + "if __name__ == \"__main__\":\n", + " main()" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "274e92dd-ba10-437f-b881-b24cd7489a48", + "metadata": {}, + "outputs": [], + "source": [] } ], "metadata": { @@ -90,7 +383,7 @@ "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython3", - "version": "3.9.13" + "version": "3.13.5" } }, "nbformat": 4,