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268 changes: 266 additions & 2 deletions lab-python-error-handling.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -72,11 +72,275 @@
"\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": "b383f78e",
"metadata": {},
"source": [
"### ANSWER"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "9ab94e79",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"=== CUSTOMER ORDER MANAGEMENT SYSTEM ===\n",
"\n",
"Step 1: Initialize Inventory\n",
"\n",
"Initial inventory: {'t-shirt': 5, 'mug': 10, 'hat': 12, 'book': 8, 'keychain': 12}\n",
"\n",
"==================================================\n",
"Step 2: Get Customer Orders\n",
"'mug' added to order. Total: 1 product(s).\n",
"'hat' added to order. Total: 2 product(s).\n",
"Error: 'spoone' is not in the inventory. Available products: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
"'t-shirt' added to order. Total: 3 product(s).\n",
"'book' added to order. Total: 4 product(s).\n",
"Order confirmed with 4 product(s).\n",
"\n",
"Customer orders: {'t-shirt', 'hat', 'book', 'mug'}\n",
"\n",
"==================================================\n",
"Step 3: Calculate Total Price\n",
"\n",
"Total price of the order: $47.00\n",
"\n",
"==================================================\n",
"Step 4: Update Inventory\n",
"\n",
"--- Updated Inventory ---\n",
"t-shirt: 4\n",
"mug: 9\n",
"hat: 11\n",
"book: 7\n",
"keychain: 12\n",
"\n",
"==================================================\n",
"Step 5: Order Statistics\n",
"\n",
"--- Order Statistics ---\n",
"Percentage of unique products ordered: 80.0%\n",
"Total products ordered: 4\n",
"\n",
"==================================================\n",
"Program completed successfully!\n"
]
}
],
"source": [
"# ============================================================================\n",
"# FONCTION 1 : Initialize Inventory (fournie dans l'énoncé)\n",
"# ============================================================================\n",
"\n",
"def initialize_inventory(products):\n",
" inventory = {}\n",
" for product in products:\n",
" while True: # Repeat until valid input\n",
" try:\n",
" qty = int(input(f\"Quantity for {product}: \"))\n",
" if qty < 0:\n",
" # Explicitly raising an error for negative values\n",
" raise ValueError(\"Negative numbers are not allowed.\")\n",
" inventory[product] = qty\n",
" break # Exit the while loop if input is valid\n",
" except ValueError:\n",
" # Catching both text input and raised negative value error\n",
" print(\"Invalid input. Please enter a positive whole number.\")\n",
" return inventory\n",
"\n",
"\n",
"# ============================================================================\n",
"# FONCTION 2 : Calculate Total Price (à corriger selon l'énoncé)\n",
"# ============================================================================\n",
"\n",
"def calculate_total_price(customer_orders):\n",
" total = 0\n",
" for product in customer_orders:\n",
" while True:\n",
" try:\n",
" # float() is used to allow prices like 9.99\n",
" price = float(input(f\"Price for {product}: \"))\n",
" total += price\n",
" break\n",
" except ValueError:\n",
" print(\"Error: Please enter a valid price (numeric).\")\n",
" return total\n",
"\n",
"\n",
"# ============================================================================\n",
"# FONCTION 3 : Get Customer Orders (à corriger selon l'énoncé)\n",
"# ============================================================================\n",
"\n",
"def get_customer_orders(inventory):\n",
" \"\"\"\n",
" Récupère les commandes clients avec validation complète :\n",
" - Nombre de commandes valide (entier positif)\n",
" - Produits existants dans l'inventaire\n",
" - Produits avec stock disponibles\n",
" - Possibilité d'annuler avec 'escape'\n",
" - Possibilité de confirmer avec 'Enter' vide après avoir entré au moins 1 produit\n",
" \"\"\"\n",
" customer_orders = set()\n",
" \n",
" # Validation du nombre de commandes\n",
" valid_num = False\n",
" while not valid_num:\n",
" try:\n",
" num_orders_input = input(\"Enter the number of customer orders: \").strip().lower()\n",
" if num_orders_input == 'escape':\n",
" print(\"Order cancelled.\")\n",
" return set()\n",
" num_orders = int(num_orders_input)\n",
" if num_orders <= 0:\n",
" raise ValueError(\"Please enter a positive number.\")\n",
" valid_num = True\n",
" except ValueError as error:\n",
" print(f\"Invalid input! {error}\")\n",
" \n",
" # Récupération des produits commandés\n",
" for i in range(num_orders):\n",
" valid_product = False\n",
" while not valid_product:\n",
" prompt = f\"Enter the name of product {i+1} (or press 'Enter' to finish, or type 'escape' to cancel): \"\n",
" product = input(prompt).strip().lower()\n",
" \n",
" # ✅ Permettre de sortir avec 'escape'\n",
" if product == 'escape':\n",
" print(\"Order cancelled.\")\n",
" return set()\n",
" \n",
" # ✅ Permettre de confirmer avec Entrée vide SI au moins 1 produit a été saisi\n",
" if not product:\n",
" if len(customer_orders) > 0:\n",
" print(f\"Order confirmed with {len(customer_orders)} product(s).\")\n",
" return customer_orders\n",
" else:\n",
" print(\"Error: Product name cannot be empty. Please enter at least one product.\")\n",
" continue\n",
" \n",
" # Vérifier que le produit existe dans l'inventaire\n",
" if product not in inventory:\n",
" print(f\"Error: '{product}' is not in the inventory. Available products: {list(inventory.keys())}\")\n",
" continue\n",
" \n",
" # Vérifier que le produit a du stock disponible\n",
" if inventory[product] <= 0:\n",
" print(f\"Error: '{product}' is out of stock. Please choose another product.\")\n",
" continue\n",
" \n",
" # ✅ Si tout est valide, ajouter au set et passer au suivant\n",
" customer_orders.add(product)\n",
" print(f\"'{product}' added to order. Total: {len(customer_orders)} product(s).\")\n",
" valid_product = True\n",
" \n",
" # ✅ Si on arrive ici, c'est qu'on a fini tous les produits demandés\n",
" print(f\"Order completed with {len(customer_orders)} product(s).\")\n",
" return customer_orders\n",
"\n",
"\n",
"# ============================================================================\n",
"# FONCTIONS SUPPLÉMENTAIRES (pour un programme complet)\n",
"# ============================================================================\n",
"\n",
"def update_inventory(customer_orders, inventory):\n",
" \"\"\"\n",
" Met à jour l'inventaire en soustrayant les produits commandés.\n",
" \"\"\"\n",
" for product in customer_orders:\n",
" if product in inventory:\n",
" inventory[product] -= 1\n",
" return inventory\n",
"\n",
"\n",
"def calculate_order_statistics(customer_orders, products):\n",
" \"\"\"\n",
" Calcule les statistiques de commande.\n",
" \"\"\"\n",
" total_products_ordered = len(customer_orders)\n",
" unique_products_ordered = len(set(customer_orders))\n",
" if len(products) > 0:\n",
" percentage_unique = round((unique_products_ordered / len(products)) * 100, 2)\n",
" else:\n",
" percentage_unique = 0\n",
" return {\n",
" 'percentage_unique': percentage_unique, \n",
" 'total_products_ordered': total_products_ordered\n",
" }\n",
"\n",
"\n",
"def print_order_statistics(order_statistics):\n",
" \"\"\"\n",
" Affiche les statistiques de commande.\n",
" \"\"\"\n",
" print(\"\\n--- Order Statistics ---\")\n",
" print(f\"Percentage of unique products ordered: {order_statistics['percentage_unique']}%\")\n",
" print(f\"Total products ordered: {order_statistics['total_products_ordered']}\")\n",
"\n",
"\n",
"def print_updated_inventory(inventory):\n",
" \"\"\"\n",
" Affiche l'inventaire mis à jour.\n",
" \"\"\"\n",
" print(\"\\n--- Updated Inventory ---\")\n",
" for product, quantity in inventory.items():\n",
" print(f\"{product}: {quantity}\")\n",
"\n",
"\n",
"# ============================================================================\n",
"# PROGRAMME PRINCIPAL - TEST COMPLET\n",
"# ============================================================================\n",
"\n",
"if __name__ == \"__main__\":\n",
" # Définir les produits disponibles\n",
" products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
" \n",
" print(\"=== CUSTOMER ORDER MANAGEMENT SYSTEM ===\\n\")\n",
" \n",
" # 1. Initialiser l'inventaire\n",
" print(\"Step 1: Initialize Inventory\")\n",
" inventory = initialize_inventory(products)\n",
" print(f\"\\nInitial inventory: {inventory}\")\n",
" \n",
" # 2. Récupérer les commandes clients (avec validation)\n",
" print(\"\\n\" + \"=\"*50)\n",
" print(\"Step 2: Get Customer Orders\")\n",
" customer_orders = get_customer_orders(inventory)\n",
" print(f\"\\nCustomer orders: {customer_orders}\")\n",
" \n",
" # 3. Calculer le prix total (avec validation)\n",
" print(\"\\n\" + \"=\"*50)\n",
" print(\"Step 3: Calculate Total Price\")\n",
" total_price = calculate_total_price(customer_orders)\n",
" print(f\"\\nTotal price of the order: ${total_price:.2f}\")\n",
" \n",
" # 4. Mettre à jour l'inventaire\n",
" print(\"\\n\" + \"=\"*50)\n",
" print(\"Step 4: Update Inventory\")\n",
" inventory = update_inventory(customer_orders, inventory)\n",
" print_updated_inventory(inventory)\n",
" \n",
" # 5. Calculer et afficher les statistiques\n",
" print(\"\\n\" + \"=\"*50)\n",
" print(\"Step 5: Order Statistics\")\n",
" order_stats = calculate_order_statistics(customer_orders, products)\n",
" print_order_statistics(order_stats)\n",
" \n",
" print(\"\\n\" + \"=\"*50)\n",
" print(\"Program completed successfully!\")"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "base",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +354,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
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