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lab pyton error handling completed #415

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176 changes: 174 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 +72,183 @@
"\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": 10,
"id": "f7afecde",
"metadata": {},
"outputs": [],
"source": [
"products = ['book', 'mug', 'hat']\n",
"\n",
"inventory = {\n",
" 'book': 10,\n",
" 'mug': 20,\n",
" 'hat': 0\n",
"}\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"
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "6b934843",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"bad input invalid literal for int() with base 10: 'p'\n",
"bad input Invalid price! Please enter a non-negative value.\n"
]
},
{
"data": {
"text/plain": [
"14"
]
},
"execution_count": 5,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"def calculate_price (customer_orders):\n",
" price_list = []\n",
" for product in customer_orders:\n",
" valid_input = False\n",
" while not valid_input:\n",
" try:\n",
" price = int(input(f'How much is the {product}?'))\n",
" if price <= 0:\n",
" raise ValueError(\"Invalid price! Please enter a non-negative value.\")\n",
" valid_input = True\n",
" except ValueError as error:\n",
" print ('bad input', error)\n",
" price_list.append(price) \n",
" return sum(price_list)\n",
"\n",
"calculate_price({'book', 'mug'})\n"
]
},
{
"cell_type": "code",
"execution_count": 11,
"id": "2be770ad",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"You made a mistake: hat is out of stock\n",
"You made a mistake: There is no such a key\n"
]
},
{
"data": {
"text/plain": [
"{'book', 'mug'}"
]
},
"execution_count": 11,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"def get_customer_orders(inventory):\n",
" result = set()\n",
" valid_unit = False\n",
" while not valid_unit:\n",
" try:\n",
" unit = int(input('Enter the number of customer orders: '))\n",
" if unit < 0:\n",
" raise ValueError(\"Invalid unit! Please enter a non-negative value.\")\n",
" valid_unit = True\n",
" except ValueError as error:\n",
" print ('bad input', error)\n",
"\n",
" for i in range(int(unit)):\n",
" \n",
" valid_product = False\n",
" while not valid_product:\n",
" try:\n",
" product = input('Enter the name of a product that a customer wants to order: ')\n",
" if product not in inventory:\n",
" raise ValueError(f\"There is no such a {product}\")\n",
" elif inventory[product] == 0:\n",
" raise ValueError(f\"{product} is out of stock\")\n",
" else:\n",
" valid_product = True\n",
" result.add(product)\n",
" except ValueError as error:\n",
" print('You made a mistake:', error)\n",
" \n",
" return (result)\n",
"\n",
"get_customer_orders(inventory)\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "cf11437f",
"metadata": {},
"outputs": [],
"source": [
"## Version 2:\n",
"\n",
"def get_customer_orders2(inventory):\n",
" result = set()\n",
" while True:\n",
" try:\n",
" unit = int(input('Enter the number of customer orders: '))\n",
" if unit < 0:\n",
" raise ValueError(\"Invalid unit! Please enter a non-negative value.\")\n",
" else:\n",
" break\n",
" except ValueError as error:\n",
" print ('bad input', error)\n",
"\n",
" for i in range(int(unit)):\n",
" while True:\n",
" try:\n",
" product = input('Enter the name of a product that a customer wants to order: ')\n",
" if product not in inventory:\n",
" raise ValueError(f\"There is no such a {product}\")\n",
" elif inventory[product] == 0:\n",
" raise ValueError(f\"{product} is out of stock\")\n",
" else:\n",
" result.add(product)\n",
" break\n",
" except ValueError as error:\n",
" print('You made a mistake:', error)\n",
" \n",
" return (result)\n"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "base",
"language": "python",
"name": "python3"
},
Expand All @@ -90,7 +262,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.12.7"
}
},
"nbformat": 4,
Expand Down