Repository Updated.

Author: geonextgis

10 Exception Handling/.ipynb_checkpoints/01_Introduction_to_Exception_Handling-checkpoint.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "6729960a-a816-4285-b7e1-95c98c46e690",
+   "metadata": {},
+   "source": [
+    "## Exception Handling"
+   ]
+  }
+ ],
+ "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": "3.10.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

10 Exception Handling/.ipynb_checkpoints/02_try_except_Statement-checkpoint.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "4438521d-a198-4af9-b634-448e65fdc540",
+   "metadata": {},
+   "source": [
+    "## Try-Except Statement\n",
+    "In Python, exceptions can be handled using try-except blocks. \n",
+    "* If the Python program contains suspicious code that may throw the exception, we must place that code in the try block. \n",
+    "* The try block must be followed by the except statement, which contains a block of code that will be executed in case there is some exception in the try block. \n",
+    "* We can thus choose what operations to perform once we have caught the exception"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "aae2b4d8-d0e3-431b-ad11-7f63c3540186",
+   "metadata": {},
+   "source": [
+    "<center><img src=\"https://files.realpython.com/media/try_except.c94eabed2c59.png\" style=\"max-width:650px; height:auto\"></center>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0f743db4-d2aa-4874-acfb-c0d81414c9cb",
+   "metadata": {},
+   "source": [
+    "**Syntax:**\n",
+    "```python\n",
+    "try:\n",
+    "    # Code that may raise an exception\n",
+    "    # ...\n",
+    "except SomeException as e:\n",
+    "    # Code to handle the exception\n",
+    "    # ...\n",
+    "```\n",
+    "\n",
+    "**Example:**"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "9088a0a5-182b-442b-9bcf-c0e9a1a059d1",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The list item is: a\n",
+      "Oops! <class 'ValueError'> occured.\n",
+      "\n",
+      "The list item is: 0\n",
+      "Oops! <class 'ZeroDivisionError'> occured.\n",
+      "\n",
+      "The list item is: 2\n",
+      "The reciprocal of 2 is 0.5\n"
+     ]
+    }
+   ],
+   "source": [
+    "myList = [\"a\", 0, 2]\n",
+    "\n",
+    "for i in myList:\n",
+    "    try:\n",
+    "        print(\"The list item is:\", i)\n",
+    "        reciprocal = 1/int(i)\n",
+    "        print(\"The reciprocal of\", i, \"is\", reciprocal)\n",
+    "        \n",
+    "    except Exception as e: #Using Exception class\n",
+    "        print(\"Oops!\", e.__class__, \"occured.\")\n",
+    "        print()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d6cd5ce9-65d2-4db9-91fb-c7815d70b16e",
+   "metadata": {},
+   "source": [
+    "* In this program, we loop through the values of a list 'myList'. \n",
+    "* As previously mentioned, the portion that can cause an exception is placed inside the try block. \n",
+    "* If no exception occurs, the except block is skipped and normal flow continues (for last value). \n",
+    "* But if any exception occurs, it is caught by the except block (first and second values).\n",
+    "* Here, we print the name of the exception using the exc_info() function inside sys module. \n",
+    "* We can see that element “a” causes ValueError and 0 causes ZeroDivisionError."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "1e1674a9-286f-42b6-b707-26dfe2d0e7fb",
+   "metadata": {},
+   "source": [
+    "### Catching Specific Exceptions in Python\n",
+    "* In the above example, we did not mention any specific exception in the **except** clause. \n",
+    "* This is not a good programming practice as it will catch all exceptions and handle every case in the same way. \n",
+    "* We can specify which exceptions an **except** clause should catch. \n",
+    "* A try clause can have any number of **except** clauses to handle different exceptions, however, only one will be executed in case an exception occurs. \n",
+    "* You can use multiple **except** blocks for different types of exceptions. \n",
+    "* We can even use a tuple of values to specify multiple exceptions in an **except** clause. Here is an example to understand this better:"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e97b019d-0a77-45ba-af25-ddb49eb95cdb",
+   "metadata": {},
+   "source": [
+    "**Example:**"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "a94e3590-95fb-4687-9181-6e55ea6f17df",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Arithmetic Exception\n"
+     ]
+    }
+   ],
+   "source": [
+    "try:\n",
+    "    a = 10/0\n",
+    "    print(a)\n",
+    "    \n",
+    "except (ArithmeticError, IOError):\n",
+    "    print(\"Arithmetic Exception\")"
+   ]
+  }
+ ],
+ "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": "3.10.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

10 Exception Handling/.ipynb_checkpoints/03_try_except_else_Statement-checkpoint.ipynb

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+{
+ "cells": [],
+ "metadata": {},
+ "nbformat": 4,
+ "nbformat_minor": 5
+}