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Error handling extra #63

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74 changes: 74 additions & 0 deletions .ipynb_checkpoints/lab-python-error-handling-checkpoint.ipynb
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Original file line number Diff line number Diff line change
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{
"cells": [
{
"cell_type": "markdown",
"id": "25d7736c-ba17-4aff-b6bb-66eba20fbf4e",
"metadata": {},
"source": [
"# Lab | Error Handling"
]
},
{
"cell_type": "markdown",
"id": "6f8e446f-16b4-4e21-92e7-9d3d1eb551b6",
"metadata": {},
"source": [
"Objective: Practice how to identify, handle and recover from potential errors in Python code using try-except blocks."
]
},
{
"cell_type": "markdown",
"id": "e253e768-aed8-4791-a800-87add1204afa",
"metadata": {},
"source": [
"## Challenge \n",
"\n",
"Paste here your lab *functions* solutions. Apply error handling techniques to each function using try-except blocks. "
]
},
{
"cell_type": "markdown",
"id": "9180ff86-c3fe-4152-a609-081a287fa1af",
"metadata": {},
"source": [
"The try-except block in Python is designed to handle exceptions and provide a fallback mechanism when code encounters errors. By enclosing the code that could potentially throw errors in a try block, followed by specific or general exception handling in the except block, we can gracefully recover from errors and continue program execution.\n",
"\n",
"However, there may be cases where an input may not produce an immediate error, but still needs to be addressed. In such situations, it can be useful to explicitly raise an error using the \"raise\" keyword, either to draw attention to the issue or handle it elsewhere in the program.\n",
"\n",
"Modify the code to handle possible errors in Python, it is recommended to use `try-except-else-finally` blocks, incorporate the `raise` keyword where necessary, and print meaningful error messages to alert users of any issues that may occur during program execution.\n",
"\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
"metadata": {},
"outputs": [],
"source": [
"# your code goes here"
]
}
],
"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": "3.9.13"
}
},
"nbformat": 4,
"nbformat_minor": 5
}
208 changes: 204 additions & 4 deletions lab-python-error-handling.ipynb
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Expand Up @@ -41,12 +41,212 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 1,
"id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The value of i is -2 and the inverse of i is -0.5\n",
"-0.5\n",
"The value of i is -1 and the inverse of i is -1.0\n",
"-1.0\n",
"The value of i is 0, cannot divide by zero!\n",
"The value of i is 1 and the inverse of i is 1.0\n",
"1.0\n",
"The value of i is 2 and the inverse of i is 0.5\n",
"0.5\n",
"The value of i is 3 and the inverse of i is 0.3333333333333333\n",
"0.3333333333333333\n",
"The value of i is 4 and the inverse of i is 0.25\n",
"0.25\n"
]
}
],
"source": [
"# your code goes here"
"for i in range(-2, 5): \n",
" try:\n",
" inverse = 1 / i\n",
" print(f\"The value of i is {i} and the inverse of i is {1/i}\")\n",
" print(inverse)\n",
" except ZeroDivisionError:\n",
" print(f\"The value of i is {i}, cannot divide by zero!\")"
]
},
{
"cell_type": "code",
"execution_count": 6,
"id": "4fd42b6b-3743-4cd0-b6db-278a28652483",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The ratio (1/i) is -0.5\n",
"The ratio (1/i) is -1.0\n",
"Error for i = 0: Why do you want to divide by 0?\n",
"The ratio (1/i) is 1.0\n",
"The ratio (1/i) is 0.5\n",
"The ratio (1/i) is 0.3333333333333333\n",
"The ratio (1/i) is 0.25\n",
"The ratio (1/i) is 0.2\n",
"The ratio (1/i) is 0.16666666666666666\n",
"The ratio (1/i) is 0.14285714285714285\n",
"The ratio (1/i) is 0.125\n",
"The ratio (1/i) is 0.1111111111111111\n",
"The ratio (1/i) is 0.1\n",
"The ratio (1/i) is 0.09090909090909091\n",
"The ratio (1/i) is 0.08333333333333333\n",
"The ratio (1/i) is 0.07692307692307693\n",
"The ratio (1/i) is 0.07142857142857142\n"
]
}
],
"source": [
"for i in range(-2, 15):\n",
" try:\n",
" if i == 0:\n",
" raise ZeroDivisionError(\"Why do you want to divide by 0?\")\n",
" else:\n",
" ratio = 1 / i\n",
" print(f\"The ratio (1/i) is {ratio}\")\n",
" \n",
" except ZeroDivisionError as e:\n",
" print(f\"Error for i = {i}: {e}\")"
]
},
{
"cell_type": "code",
"execution_count": 8,
"id": "9e04bfce-c147-4a8b-92a8-8e988a1c5c7c",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"HELLO, WORLD!\n",
"Error: 'str' object has no attribute 'age'\n"
]
}
],
"source": [
"text = \"Hello, world!\"\n",
"print(text.upper()) \n",
" \n",
"\n",
"try:\n",
" print(text.age)\n",
"except AttributeError as e:\n",
" print(f\"Error: {e}\")\n",
" "
]
},
{
"cell_type": "code",
"execution_count": 9,
"id": "f06a74d6-137b-4052-bb64-6e31be36db2c",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"3\n",
"Error: list index out of range\n"
]
}
],
"source": [
"numbers = [1, 2, 3]\n",
"print(numbers[2]) \n",
"\n",
"try:\n",
" print(numbers[5]) \n",
"except IndexError as e:\n",
" print(f\"Error: {e}\")"
]
},
{
"cell_type": "code",
"execution_count": 10,
"id": "1163fa6f-e345-4c80-a496-fbd67321e1a4",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Alice\n",
"Error: 'gender'\n"
]
}
],
"source": [
"person = {\"name\": \"Alice\", \"age\": 30}\n",
"print(person[\"name\"]) \n",
"\n",
"try:\n",
" print(person[\"gender\"]) \n",
"except KeyError as e:\n",
" print(f\"Error: {e}\")\n"
]
},
{
"cell_type": "code",
"execution_count": 16,
"id": "8e43d0d3-e39b-458f-9b59-03e3818a635e",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Error: unsupported operand type(s) for +: 'int' and 'str'\n"
]
}
],
"source": [
"num1 = 5\n",
"num2 = \"10\"\n",
"\n",
"try:\n",
" sum_result = num1 + num2 \n",
" print(f\"The sum is: {sum_result}\")\n",
"except TypeError as e:\n",
" print(f\"Error: {e}\")"
]
},
{
"cell_type": "code",
"execution_count": 18,
"id": "f19d2190-532d-45be-ba54-af126876afb0",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"123\n",
"Error: invalid literal for int() with base 10: 'abc'\n"
]
}
],
"source": [
"num_str = \"123\"\n",
"num_int = int(num_str) \n",
"print(num_int) \n",
"\n",
"invalid_str = \"abc\"\n",
"\n",
"try:\n",
" invalid_int = int(invalid_str)\n",
" print(f\"The integer is {invalid_str}\")\n",
"except ValueError as e:\n",
" print(f\"Error: {e}\")"
]
}
],
Expand All @@ -66,7 +266,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
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