Created on Cognitive Class Labs

Python Lab3-3.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1 if you add one 2\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# First function example: Add 1 to a and store as b\n",
    "\n",
    "def add(a):\n",
    "    b = a + 1\n",
    "    print(a, \"if you add one\", b)\n",
    "    return(b)\n",
    "\n",
    "add(1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on function add in module __main__:\n",
      "\n",
      "add(a)\n",
      "\n"
     ]
    }
   ],
   "source": [
    "# Get a help on add function\n",
    "\n",
    "help(add)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1 if you add one 2\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Call the function add()\n",
    "\n",
    "add(1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2 if you add one 3\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Call the function add()\n",
    "\n",
    "add(2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Define a function for multiple two numbers\n",
    "\n",
    "def Mult(a, b):\n",
    "    c = a * b\n",
    "    return(c)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "6"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Use mult() multiply two integers\n",
    "\n",
    "Mult(2, 3)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "31.400000000000002"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Use mult() multiply two floats\n",
    "\n",
    "Mult(10.0, 3.14)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Michael Jackson Michael Jackson '"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Use mult() multiply two different type values together\n",
    "\n",
    "Mult(2, \"Michael Jackson \")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2 if you square + 1 5\n"
     ]
    }
   ],
   "source": [
    "# Function Definition\n",
    "\n",
    "def square(a):\n",
    "    \n",
    "    # Local variable b\n",
    "    b = 1\n",
    "    c = a * a + b\n",
    "    print(a, \"if you square + 1\", c) \n",
    "    return(c)\n",
    "\n",
    "x = 2\n",
    "z = square(2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "3 if you square + 1 10\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "10"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Initializes Global variable  \n",
    "\n",
    "x = 3\n",
    "# Makes function call and return function a y\n",
    "y = square(x)\n",
    "y\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2 if you square + 1 5\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "5"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Directly enter a number as parameter\n",
    "\n",
    "square(2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Define functions, one with return value None and other without return value\n",
    "\n",
    "def MJ():\n",
    "    print('Michael Jackson')\n",
    "    \n",
    "def MJ1():\n",
    "    print('Michael Jackson')\n",
    "    return(None)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Michael Jackson\n"
     ]
    }
   ],
   "source": [
    "# See the output\n",
    "\n",
    "MJ()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Michael Jackson\n"
     ]
    }
   ],
   "source": [
    "# See the output\n",
    "\n",
    "MJ1()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Michael Jackson\n",
      "None\n",
      "Michael Jackson\n",
      "None\n"
     ]
    }
   ],
   "source": [
    "# See what functions returns are\n",
    "\n",
    "print(MJ())\n",
    "print(MJ1())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Define the function for combining strings\n",
    "\n",
    "def con(a, b):\n",
    "    return(a + b)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'This is'"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Test on the con() function\n",
    "\n",
    "con(\"This \", \"is\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "5"
      ]
     },
     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# a and b calculation block1\n",
    "\n",
    "a1 = 4\n",
    "b1 = 5\n",
    "c1 = a1 + b1 + 2 * a1 * b1 - 1\n",
    "if(c1 < 0):\n",
    "    c1 = 0 \n",
    "else:\n",
    "    c1 = 5\n",
    "c1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# a and b calculation block2\n",
    "\n",
    "a2 = 0\n",
    "b2 = 0\n",
    "c2 = a2 + b2 + 2 * a2 * b2 - 1\n",
    "if(c2 < 0):\n",
    "    c2 = 0 \n",
    "else:\n",
    "    c2 = 5\n",
    "c2   "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Make a Function for the calculation above\n",
    "\n",
    "def Equation(a,b):\n",
    "    c = a1 + b1 + 2 * a2 * b2 - 1\n",
    "    if(c < 0):\n",
    "        c = 0 \n",
    "    else:\n",
    "        c = 5\n",
    "    return(c) "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "5"
      ]
     },
     "execution_count": 32,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "a1 = 4\n",
    "b1 = 5\n",
    "c1 = Equation(a1, b1)\n",
    "c1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "5"
      ]
     },
     "execution_count": 33,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "a2 = 0\n",
    "b2 = 0\n",
    "c2 = Equation(a2, b2)\n",
    "c2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[10.0, 8.5, 9.5, 7.0, 7.0, 9.5, 9.0, 9.5]\n"
     ]
    }
   ],
   "source": [
    "# Build-in function print()\n",
    "\n",
    "album_ratings = [10.0, 8.5, 9.5, 7.0, 7.0, 9.5, 9.0, 9.5] \n",
    "print(album_ratings)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "70.0"
      ]
     },
     "execution_count": 35,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Use sum() to add every element in a list or tuple together\n",
    "\n",
    "sum(album_ratings)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "8"
      ]
     },
     "execution_count": 36,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Show the length of the list or tuple\n",
    "\n",
    "len(album_ratings)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Michael Jackson Thriller 1980\n",
      "Oldie\n"
     ]
    }
   ],
   "source": [
    "# Function example\n",
    "\n",
    "def type_of_album(artist, album, year_released):\n",
    "    \n",
    "    print(artist, album, year_released)\n",
    "    if year_released > 1980:\n",
    "        return \"Modern\"\n",
    "    else:\n",
    "        return \"Oldie\"\n",
    "    \n",
    "x = type_of_album(\"Michael Jackson\", \"Thriller\", 1980)\n",
    "print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Print the list using for loop\n",
    "\n",
    "def PrintList(the_list):\n",
    "    for element in the_list:\n",
    "        print(element)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "1\n",
      "the man\n",
      "abc\n"
     ]
    }
   ],
   "source": [
    "# Implement the printlist function\n",
    "\n",
    "PrintList(['1', 1, 'the man', \"abc\"])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Example for setting param with default value\n",
    "\n",
    "def isGoodRating(rating=4): \n",
    "    if(rating < 7):\n",
    "        print(\"this album sucks it's rating is\",rating)\n",
    "        \n",
    "    else:\n",
    "        print(\"this album is good its rating is\",rating)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "this album sucks it's rating is 4\n",
      "this album is good its rating is 10\n"
     ]
    }
   ],
   "source": [
    "# Test the value with default value and with input\n",
    "\n",
    "isGoodRating()\n",
    "isGoodRating(10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 44,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Michael Jackson is an artist\n"
     ]
    }
   ],
   "source": [
    "# Example of global variable\n",
    "\n",
    "artist = \"Michael Jackson\"\n",
    "def printer1(artist):\n",
    "    internal_var = artist\n",
    "    print(artist, \"is an artist\")\n",
    "    \n",
    "printer1(artist)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'internal_var' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-45-0a3947ae8535>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      6\u001b[0m     \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0martist\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"is an artist\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      7\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 8\u001b[0;31m \u001b[0mprinter1\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minternal_var\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mNameError\u001b[0m: name 'internal_var' is not defined"
     ]
    }
   ],
   "source": [
    "# Example of global variable\n",
    "\n",
    "artist = \"Michael Jackson\"\n",
    "def printer1(artist):\n",
    "    internal_var = artist\n",
    "    print(artist, \"is an artist\")\n",
    "    \n",
    "printer1(internal_var)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Michael Jackson is an artist\n",
      "Whitney Houston is an artist\n"
     ]
    }
   ],
   "source": [
    "#create global variables from within a function as follows:\n",
    "\n",
    "artist = \"Michael Jackson\"\n",
    "\n",
    "def printer(artist):\n",
    "    global internal_var \n",
    "    internal_var= \"Whitney Houston\"\n",
    "    print(artist,\"is an artist\")\n",
    "\n",
    "printer(artist) \n",
    "printer(internal_var)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 47,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "AC/DC's rating is: 10.0\n",
      "Deep Purple's rating is: 0.0\n",
      "My favourite band is: AC/DC\n"
     ]
    }
   ],
   "source": [
    "# Example of global variable\n",
    "\n",
    "myFavouriteBand = \"AC/DC\"\n",
    "\n",
    "def getBandRating(bandname):\n",
    "    if bandname == myFavouriteBand:\n",
    "        return 10.0\n",
    "    else:\n",
    "        return 0.0\n",
    "\n",
    "print(\"AC/DC's rating is:\", getBandRating(\"AC/DC\"))\n",
    "print(\"Deep Purple's rating is:\",getBandRating(\"Deep Purple\"))\n",
    "print(\"My favourite band is:\", myFavouriteBand)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 48,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "AC/DC's rating is:  10.0\n",
      "Deep Purple's rating is:  0.0\n",
      "My favourite band is AC/DC\n"
     ]
    }
   ],
   "source": [
    "# Example of local variable\n",
    "\n",
    "def getBandRating(bandname):\n",
    "    myFavouriteBand = \"AC/DC\"\n",
    "    if bandname == myFavouriteBand:\n",
    "        return 10.0\n",
    "    else:\n",
    "        return 0.0\n",
    "\n",
    "print(\"AC/DC's rating is: \", getBandRating(\"AC/DC\"))\n",
    "print(\"Deep Purple's rating is: \", getBandRating(\"Deep Purple\"))\n",
    "print(\"My favourite band is\", myFavouriteBand)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "AC/DC's rating is: 0.0\n",
      "Deep Purple's rating is:  10.0\n",
      "My favourite band is: AC/DC\n"
     ]
    }
   ],
   "source": [
    "# Example of global variable and local variable with the same name\n",
    "\n",
    "myFavouriteBand = \"AC/DC\"\n",
    "\n",
    "def getBandRating(bandname):\n",
    "    myFavouriteBand = \"Deep Purple\"\n",
    "    if bandname == myFavouriteBand:\n",
    "        return 10.0\n",
    "    else:\n",
    "        return 0.0\n",
    "\n",
    "print(\"AC/DC's rating is:\",getBandRating(\"AC/DC\"))\n",
    "print(\"Deep Purple's rating is: \",getBandRating(\"Deep Purple\"))\n",
    "print(\"My favourite band is:\",myFavouriteBand)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "metadata": {},
   "outputs": [],
   "source": [
    "#Come up with a function that divides the first input by the second input:\n",
    "\n",
    "def div(a, b):\n",
    "    return(a/b)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 51,
   "metadata": {},
   "outputs": [],
   "source": [
    "#Use the function con for the following question.\n",
    "\n",
    "def con(a, b):\n",
    "    return(a + b)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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