Error Handling explained
mehul
GitHub
parent
2322b3951c
commit
b3ca37c38a
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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Errors and Exceptions:"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 1,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"OS Error occured\n",
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"Always going to run\n"
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]
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}
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],
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"source": [
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"try:\n",
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" with open('newfile.txt','r') as f:\n",
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" f.write(\"New line to write.\")\n",
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"except OSError:\n",
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" print('OS Error occured')\n",
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"finally:\n",
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" print('Always going to run')"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"metadata": {},
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"outputs": [],
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"source": [
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"def ask_for_int():\n",
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" \n",
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" while True:\n",
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" try:\n",
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" result = int(input(\"Please provide a number: \"))\n",
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" except:\n",
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" print(\"\\nIncorrect Value!\\n\")\n",
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" continue\n",
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" else:\n",
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" print(\"\\n Thank you. \")\n",
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" break\n",
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" finally:\n",
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" print(\"End of the code block. \\n\\n\")\n",
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" "
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Please provide a number: ty\n",
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"\n",
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"Incorrect Value!\n",
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"\n",
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"End of the code block. \n",
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"\n",
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"\n",
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"Please provide a number: 2.3\n",
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"\n",
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"Incorrect Value!\n",
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"\n",
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"End of the code block. \n",
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"\n",
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"\n",
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"Please provide a number: 4\n",
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"\n",
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" Thank you. \n",
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"End of the code block. \n",
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"\n",
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"\n"
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]
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}
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],
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"source": [
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"ask_for_int()"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### Problem 1\n",
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"Handle the exception thrown by the code below by using <code>try</code> and <code>except</code> blocks."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 16,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Error Occured\n"
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]
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}
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],
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"source": [
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"try:\n",
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" for i in ['a','b','c']:\n",
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" print(i**2)\n",
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"except:\n",
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" print('Error Occured')"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### Problem 2\n",
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"Handle the exception thrown by the code below by using <code>try</code> and <code>except</code> blocks. Then use a <code>finally</code> block to print 'All Done.'"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 17,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Cannot divide by 0\n",
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"All Done\n"
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]
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}
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],
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"source": [
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"try:\n",
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" x = 5\n",
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" y = 0\n",
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"\n",
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" z = x/y\n",
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"except ZeroDivisionError:\n",
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" print('Cannot divide by 0')\n",
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"except:\n",
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" print('Error Occured')\n",
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"finally:\n",
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" print('All Done')"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### Problem 3\n",
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"Write a function that asks for an integer and prints the square of it. Use a <code>while</code> loop with a <code>try</code>, <code>except</code>, <code>else</code> block to account for incorrect inputs."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 7,
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"metadata": {},
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"outputs": [],
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"source": [
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"def ask():\n",
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" \n",
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" # Waiting for the correct response\n",
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" waiting = True\n",
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" while waiting:\n",
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" try:\n",
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" number = int(input('Input an integer: '))\n",
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" except:\n",
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" print('\\nAn error occurred! Please try again!\\n')\n",
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" continue\n",
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" else:\n",
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" waiting = False\n",
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" \n",
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" print(f'\\nThank you, your number squared is {number**2}') "
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]
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Input an integer: y\n",
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"\n",
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"An error occurred! Please try again!\n",
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"\n",
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"Input an integer: r\n",
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"\n",
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"An error occurred! Please try again!\n",
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"\n",
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"Input an integer: 5\n",
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"\n",
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"Thank you, your number squared is 25\n"
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]
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}
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],
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"source": [
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"ask()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.6.5"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}
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