Exercise 4 Solutions.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#Basic example for using python debugger, you may also use \"pythontutor.com\" for online debugging\n",
    "#Do not use just (c)ontinue, use also (s)tep, (n)ext, (l)ist or (p)rint etc... to benefit from all features of the debugger\n",
    "import pdb\n",
    "\n",
    "def exam_func(number):\n",
    "    \n",
    "    number = number +1\n",
    "    \n",
    "    number = 2*number+3\n",
    "    \n",
    "    return (number)\n",
    "\n",
    "    \n",
    "\n",
    "a=5+6\n",
    "pdb.set_trace() # breakpoint\n",
    "b=7+8\n",
    "       \n",
    "exam_func(5)    \n",
    "\n",
    "print(\"Hello!\")  \n",
    "            \n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#A basic exception usage, try to remove 'try' and 'except' statements and run again, try to see what happens different\n",
    "try:\n",
    " a=5\n",
    " b=0\n",
    " c=a/b\n",
    "except:\n",
    " print(\"Division error\")   \n",
    "\n",
    "print ('Hello')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# Another basic exception with different kind of error, \n",
    "#Try to remove 'try' and 'except' statements and run again, try to see what happens different\n",
    "try:\n",
    " new_list = [1,2,3]\n",
    " c = new_list[5]\n",
    "except:\n",
    "  print('Out of index error')\n",
    "number = 3+4\n",
    "print(number)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# Mutiple subclass exceptions, run and think about the results, then swap 'Exception' and 'ZeroDivisionError' and see new result\n",
    "try:\n",
    " a=5\n",
    " b=0\n",
    " c=a/b\n",
    "except Exception:\n",
    " print(\"An error\") \n",
    "except ZeroDivisionError: \n",
    " print(\"Division error\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#----------------------------------------\n",
    "#Declaring your own exception\n",
    "class Interval_Exception(Exception):\n",
    "    pass\n",
    "#-----------------------------------------\n",
    "# Giving your own exception using \"raise\" within a function\n",
    "def example_func(number):\n",
    "  if(number>5 and number<10):\n",
    "     raise Interval_Exception\n",
    "  print(number)   \n",
    "\n",
    "\n",
    "try:\n",
    " example_func(8) # try also other values such as out of (5,10) interval\n",
    "except Interval_Exception:\n",
    " print(\"Error about interval!\")\n",
    "#-----------------------------------\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#Example for \"assert\" statement\n",
    "def exam_func(number):\n",
    "    return (2*number+3)\n",
    "    \n",
    "def test_func():\n",
    "    assert (exam_func(3)==7), \"Equation Error!\" #try different values for testing: /3->7,3->9/5->8,5->13/ etc...\n",
    "    print(\"Test is succesful\") \n",
    "\n",
    "try:        \n",
    " test_func()    \n",
    "except:\n",
    "  print(\"There is an equation error!\")  \n",
    "            \n"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 2",
   "language": "python",
   "name": "python2"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 2
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython2",
   "version": "2.7.9"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 0
}