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Solved Lab #593

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262 changes: 261 additions & 1 deletion lab-python-error-handling.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,266 @@
"\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": "02c698d9-b4a8-4618-8046-de780025aa2e",
"metadata": {},
"outputs": [],
"source": [
"#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), \n",
"#display an error message and ask them to re-enter the price for that product.\n",
"\n",
"#Use a try-except block to handle the error and continue prompting the user until a valid price is entered."
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "4b1e3c91-374c-4580-b47e-3d4856e16208",
"metadata": {},
"outputs": [],
"source": [
"#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),\n",
"#(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, \n",
"#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."
]
},
{
"cell_type": "code",
"execution_count": 7,
"id": "1987c819-4af8-4a86-9d87-70c8266da5fc",
"metadata": {},
"outputs": [],
"source": [
"products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
]
},
{
"cell_type": "code",
"execution_count": 46,
"id": "6c930497-056e-45ad-8fa0-bcb4a74ba02c",
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"{'t-shirt': 5, 'mug': 4, 'hat': 2, 'book': 2, 'keychain': 0}"
]
},
"execution_count": 46,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"inventory = {\"t-shirt\" : 5, \"mug\" : 4, \"hat\" : 2, \"book\": 2, \"keychain\" : 0}\n",
"inventory\n"
]
},
{
"cell_type": "code",
"execution_count": 47,
"id": "49d8888d-8e1d-40ba-9da2-d9fd9855792c",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the number of customer orders: 3\n",
"Enter product name: e\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Product not in inventory\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter product name: .\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Product not in inventory\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter product name: t-shirt\n",
"Enter product name: mug\n",
"Enter product name: keychain\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"stock not available\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter product name: hat\n"
]
}
],
"source": [
"def get_customer_orders():\n",
" orders_number = 0 \n",
" customer_orders = set()\n",
" \n",
" correct = False\n",
" while not correct:\n",
" try:\n",
" orders_number = int(input(\"Enter the number of customer orders: \"))\n",
" \n",
" if orders_number <=0:\n",
" print(\"Number must be positive\")\n",
" print()\n",
" continue \n",
" correct = True \n",
"\n",
" \n",
" except:\n",
" print(\"Invalid number of orders. Might be a non-numeric or a negative.\")\n",
" print()\n",
"\n",
" for order in range(orders_number):\n",
" correct = False\n",
" while not correct:\n",
" try:\n",
" product = input(\"Enter product name: \")\n",
" \n",
" if product not in inventory:\n",
" raise KeyError\n",
" if inventory[product] <= 0:\n",
" print(\"stock not available\")\n",
" continue\n",
" \n",
"\n",
" customer_orders.add(product)\n",
" correct = True\n",
"\n",
" except KeyError:\n",
" print(\"Product not in inventory\")\n",
"\n",
" return customer_orders\n",
"\n",
"customer_orders = get_customer_orders() \n",
"\n",
" \n",
"\n",
" "
]
},
{
"cell_type": "code",
"execution_count": 54,
"id": "e055f410-28d2-4cf9-ac12-e579506bb1c3",
"metadata": {},
"outputs": [
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of t-shirt: 5\n",
"Enter the price of hat: 10\n",
"Enter the price of mug: e\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Enter a numerical price\n",
"\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of mug: -2\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Please, use a positive price\n",
"\n"
]
},
{
"name": "stdin",
"output_type": "stream",
"text": [
"Enter the price of mug: 15\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Total Price: 30.0\n"
]
}
],
"source": [
"def total_order_price(customer_orders):\n",
" prices = []\n",
" \n",
" for product in customer_orders:\n",
" correct_price = False \n",
"\n",
" while not correct_price:\n",
" try:\n",
" price = float(input(f\"Enter the price of {product}: \"))\n",
" \n",
" if price < 0:\n",
" print(\"Please, use a positive price\")\n",
" print()\n",
" continue \n",
" prices.append(price)\n",
" correct_price = True \n",
" \n",
" except ValueError:\n",
" print(\"Enter a numerical price\")\n",
" print()\n",
"\n",
" total = sum(prices) \n",
" return total\n",
"\n",
"total = total_order_price(customer_orders)\n",
"print(\"Total Price: \", total)\n",
" "
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "85988886-f3eb-492b-b6b0-d1928b749806",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
Expand All @@ -90,7 +350,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
Expand Down