{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# 011_exceptions\n",
    "\n",
    "[Source](https://github.com/iArunava/Python-TheNoTheoryGuide/)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Simple exceptions\n",
    "''' Here are a few exceptions, try executing one while others are commented'''\n",
    "print (5/0)                # ZeroDivisionError\n",
    "print (\"string\" + 343)     # TypeError\n",
    "file = open (\"./test.txt\") # FileNotFoundError"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Simple try-catch to avoid Exceptions\n",
    "try:\n",
    "    print (5/0)\n",
    "except ZeroDivisionError:\n",
    "    print (\"Cannot Divide by zero\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# The else block\n",
    "# If the try block executes successfully, then the else block is executed\n",
    "deno = 1\n",
    "\n",
    "try:\n",
    "    print (5/deno)\n",
    "except ZeroDivisionError:\n",
    "    print (\"Deno is zero.\")\n",
    "else:\n",
    "    print (\"Deno is not Zero.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Handle expection and not do anything\n",
    "deno = 0\n",
    "\n",
    "try:\n",
    "    print (5/deno)\n",
    "except ZeroDivisionError:\n",
    "    pass\n",
    "else:\n",
    "    print (\"Deno not Zero.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Catch expection without explicitly knowing the type of exception\n",
    "deno = 1\n",
    "\n",
    "try:\n",
    "    ''' Here are a few exceptions, try executing one while others are commented'''\n",
    "    print (5/deno)\n",
    "    print (\"string\" + 343)\n",
    "    file = open (\"./test.txt\")\n",
    "except:\n",
    "    print (\"Some exception!\")\n",
    "else:\n",
    "    print (\"The try somehow executed completely!\\nDid you comment all lines?\")"
   ]
  }
 ],
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