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..8231f75 --- /dev/null +++ b/.ipynb_checkpoints/lab-python-error-handling-checkpoint.ipynb @@ -0,0 +1,385 @@ +{ + "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": "e811bde3-9103-4c23-a8e2-913e0ee53928", + "metadata": {}, + "outputs": [], + "source": [ + "# 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" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "id": "ff199957-0723-4cef-8204-7de27b7c210d", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 5\n", + "Enter the quantity of mugs available: -1\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Quantity cannot be negative. Please enter a valid quantity.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of mugs available: 3\n", + "Enter the quantity of hats available: tres\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Invalid input. Please enter a valid quantity.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of hats available: 5\n", + "Enter the quantity of books available: 0\n", + "Enter the quantity of keychains available: 43e\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Invalid input. Please enter a valid quantity.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of keychains available: 5\n", + "Enter the number of customer orders: 3\n", + "Enter the name of product 1: table\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error:This product is not in the inventory.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the name of product 1: mug\n", + "Enter the name of product 2: mug\n", + "Enter the name of product 3: h12\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error:This product is not in the inventory.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the name of product 3: Hat\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "Order Statistics:\n", + "Total Products Ordered: 3\n", + "Percentage of Products Ordered: 60.0 %\n", + "\n", + "Updated Inventory:\n", + "t-shirt: 5\n", + "mug: 1\n", + "hat: 4\n", + "book: 0\n", + "keychain: 5\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of mug: 5\n", + "Enter the price of mug: 5\n", + "Enter the price of hat: 23\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Total Price: 33.0\n" + ] + } + ], + "source": [ + "#Last exercise code lIST COMPREHENSION\n", + "\n", + "# Function 1 ---- CHANGE FOR Q1\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", + " # Function 2 --- CHANGE FOR Q3\n", + "def get_customer_orders (inventory):\n", + " customer_orders= []\n", + "\n", + " while True:\n", + " try:\n", + " num_orders =int(input(\"Enter the number of customer orders: \"))\n", + " if num_orders <0:\n", + " print(\"The number of orders cannot be negative. Please place a correct number.\")\n", + " else:\n", + " break\n", + " except ValueError:\n", + " print(\"Invalid input. Please enter a valid quantity.\")\n", + " for pname in range(num_orders):\n", + " valid_product = False\n", + " while not valid_product:\n", + " try:\n", + " product = input(f\"Enter the name of product {pname + 1}: \").lower()\n", + "\n", + " if product not in inventory:\n", + " raise ValueError(\"This product is not in the inventory.\")\n", + "\n", + " if inventory [product] <= 0:\n", + " raise ValueError(\"This product is out of stock.\")\n", + "\n", + " customer_orders.append(product)\n", + " inventory [product] -= 1\n", + " valid_product = True\n", + "\n", + " except ValueError as error:\n", + " print(f\"Error:{error}\")\n", + "\n", + " return customer_orders\n", + " \n", + "\n", + "#NEW FUNCTION --- CHANGE FOR Q2\n", + "\n", + "def calculate_total_price (customer_orders):\n", + " total_price = 0\n", + "\n", + " for product in customer_orders:\n", + " valid_input = False\n", + " while not valid_input:\n", + " try:\n", + " price = float(input(f\"Enter the price of {product}: \"))\n", + " if price >= 0:\n", + " total_price += price\n", + " valid_input =True\n", + " else:\n", + " print(\"Price cannot be negative. Please enter a valid price.\")\n", + " except ValueError:\n", + " print(\"Invalid input. Please enter a valid price.\")\n", + " \n", + " return total_price\n", + "\n", + " # Function 4\n", + "def calculate_order_statistics (customer_orders, products):\n", + " total_products_ordered = len(customer_orders)\n", + " \n", + " percentage_ordered = (total_products_ordered / len(products)) * 100\n", + " \n", + " return total_products_ordered,percentage_ordered\n", + "\n", + "''' Print the total price of the customer order. '''\n", + " #Function 5\n", + "def print_order_statistics(order_statistics):\n", + " total_products_ordered = order_statistics [0]\n", + " percentage_ordered = order_statistics [1]\n", + " \n", + " print(\"\\nOrder Statistics:\")\n", + " print(\"Total Products Ordered:\", total_products_ordered)\n", + " print(\"Percentage of Products Ordered:\", percentage_ordered, \"%\")\n", + "\n", + " #Function 6 - HERE Q1\n", + "def print_updated_inventory (inventory):\n", + " print(\"\\nUpdated Inventory:\")\n", + " for product, quantity in inventory.items():\n", + " print(f\"{product}: {quantity}\")\n", + "\n", + "# List of products\n", + "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n", + "\n", + "inventory =initialize_inventory(products)\n", + "customer_orders = get_customer_orders (inventory)\n", + "order_statistics = calculate_order_statistics (customer_orders, products)\n", + "print_order_statistics(order_statistics)\n", + "print_updated_inventory (inventory)\n", + "\n", + "total_price = calculate_total_price(customer_orders)\n", + "print(f\"Total Price: {total_price}\")\n" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "21a4881b-70d4-4447-ad67-ded3fda76a7d", + "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": "3.13.9" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +} diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb index f4c6ef6..8231f75 100644 --- a/lab-python-error-handling.ipynb +++ b/lab-python-error-handling.ipynb @@ -72,13 +72,300 @@ "\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": "e811bde3-9103-4c23-a8e2-913e0ee53928", + "metadata": {}, + "outputs": [], + "source": [ + "# 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" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "id": "ff199957-0723-4cef-8204-7de27b7c210d", + "metadata": {}, + "outputs": [ + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of t-shirts available: 5\n", + "Enter the quantity of mugs available: -1\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Quantity cannot be negative. Please enter a valid quantity.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of mugs available: 3\n", + "Enter the quantity of hats available: tres\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Invalid input. Please enter a valid quantity.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of hats available: 5\n", + "Enter the quantity of books available: 0\n", + "Enter the quantity of keychains available: 43e\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Invalid input. Please enter a valid quantity.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the quantity of keychains available: 5\n", + "Enter the number of customer orders: 3\n", + "Enter the name of product 1: table\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error:This product is not in the inventory.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the name of product 1: mug\n", + "Enter the name of product 2: mug\n", + "Enter the name of product 3: h12\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Error:This product is not in the inventory.\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the name of product 3: Hat\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "Order Statistics:\n", + "Total Products Ordered: 3\n", + "Percentage of Products Ordered: 60.0 %\n", + "\n", + "Updated Inventory:\n", + "t-shirt: 5\n", + "mug: 1\n", + "hat: 4\n", + "book: 0\n", + "keychain: 5\n" + ] + }, + { + "name": "stdin", + "output_type": "stream", + "text": [ + "Enter the price of mug: 5\n", + "Enter the price of mug: 5\n", + "Enter the price of hat: 23\n" + ] + }, + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Total Price: 33.0\n" + ] + } + ], + "source": [ + "#Last exercise code lIST COMPREHENSION\n", + "\n", + "# Function 1 ---- CHANGE FOR Q1\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", + " # Function 2 --- CHANGE FOR Q3\n", + "def get_customer_orders (inventory):\n", + " customer_orders= []\n", + "\n", + " while True:\n", + " try:\n", + " num_orders =int(input(\"Enter the number of customer orders: \"))\n", + " if num_orders <0:\n", + " print(\"The number of orders cannot be negative. Please place a correct number.\")\n", + " else:\n", + " break\n", + " except ValueError:\n", + " print(\"Invalid input. Please enter a valid quantity.\")\n", + " for pname in range(num_orders):\n", + " valid_product = False\n", + " while not valid_product:\n", + " try:\n", + " product = input(f\"Enter the name of product {pname + 1}: \").lower()\n", + "\n", + " if product not in inventory:\n", + " raise ValueError(\"This product is not in the inventory.\")\n", + "\n", + " if inventory [product] <= 0:\n", + " raise ValueError(\"This product is out of stock.\")\n", + "\n", + " customer_orders.append(product)\n", + " inventory [product] -= 1\n", + " valid_product = True\n", + "\n", + " except ValueError as error:\n", + " print(f\"Error:{error}\")\n", + "\n", + " return customer_orders\n", + " \n", + "\n", + "#NEW FUNCTION --- CHANGE FOR Q2\n", + "\n", + "def calculate_total_price (customer_orders):\n", + " total_price = 0\n", + "\n", + " for product in customer_orders:\n", + " valid_input = False\n", + " while not valid_input:\n", + " try:\n", + " price = float(input(f\"Enter the price of {product}: \"))\n", + " if price >= 0:\n", + " total_price += price\n", + " valid_input =True\n", + " else:\n", + " print(\"Price cannot be negative. Please enter a valid price.\")\n", + " except ValueError:\n", + " print(\"Invalid input. Please enter a valid price.\")\n", + " \n", + " return total_price\n", + "\n", + " # Function 4\n", + "def calculate_order_statistics (customer_orders, products):\n", + " total_products_ordered = len(customer_orders)\n", + " \n", + " percentage_ordered = (total_products_ordered / len(products)) * 100\n", + " \n", + " return total_products_ordered,percentage_ordered\n", + "\n", + "''' Print the total price of the customer order. '''\n", + " #Function 5\n", + "def print_order_statistics(order_statistics):\n", + " total_products_ordered = order_statistics [0]\n", + " percentage_ordered = order_statistics [1]\n", + " \n", + " print(\"\\nOrder Statistics:\")\n", + " print(\"Total Products Ordered:\", total_products_ordered)\n", + " print(\"Percentage of Products Ordered:\", percentage_ordered, \"%\")\n", + "\n", + " #Function 6 - HERE Q1\n", + "def print_updated_inventory (inventory):\n", + " print(\"\\nUpdated Inventory:\")\n", + " for product, quantity in inventory.items():\n", + " print(f\"{product}: {quantity}\")\n", + "\n", + "# List of products\n", + "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n", + "\n", + "inventory =initialize_inventory(products)\n", + "customer_orders = get_customer_orders (inventory)\n", + "order_statistics = calculate_order_statistics (customer_orders, products)\n", + "print_order_statistics(order_statistics)\n", + "print_updated_inventory (inventory)\n", + "\n", + "total_price = calculate_total_price(customer_orders)\n", + "print(f\"Total Price: {total_price}\")\n" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "21a4881b-70d4-4447-ad67-ded3fda76a7d", + "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 +377,7 @@ "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython3", - "version": "3.9.13" + "version": "3.13.9" } }, "nbformat": 4,