Week-02-03-List Comprehensions

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   "cells": [
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     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Slide 3\n",
      "mylist = [1,3,2,5,8]\n",
      "# Create a list comprehension that squares every element in mylist\n",
      "mynewlist = [elmnt*2 for elmnt in mylist]\n",
      "print mynewlist"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Slide 4\n",
      "mynames = ['Tom', 'Dick', 'Harry']\n",
      "x = ['Hello ' + person for person in mynames]\n",
      "print x\n",
      "\n",
      "myfloats = [1.2345, 2.3456, 3,4567]\n",
      "x = [round(mynum,2) for mynum in myfloats]\n",
      "print x\n",
      "\n",
      "def mysqplusone(a):\n",
      "    return a**2+1\n",
      "mynums = [1,2,3]\n",
      "x = [mysqplusone(i) for i in mynums]\n",
      "print x\n",
      "\n",
      "a = [1,2,3]\n",
      "b = [3,4,5]\n",
      "x = [c+d for c in a for d in b]\n",
      "print x"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Slide 7\n",
      "mynames = ['Tom', 'Dick', 'Harry']\n",
      "x = ['Hello ' + person for person in mynames if len(person) > 3]\n",
      "print x\n",
      "\n",
      "myfloats = [1.2345, 2.3456, 3,4567]\n",
      "x = [round(mynum,2) for mynum in myfloats if int(mynum)%2==0]\n",
      "print x\n",
      "\n",
      "a = [1,2,3]\n",
      "b = [3,4,5]\n",
      "x = [(c,d) for c in a for d in b if c%2 == 0 and d%2 == 0]\n",
      "print x"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Slide 8\n",
      "# S = {x\u00b2 : x in {0 ... 9}}\n",
      "S = [x**2 for x in range(10)]\n",
      "print S\n",
      "\n",
      "# V = (1, 2, 4, 8, ..., 2\u00b9\u00b2)\n",
      "V = [2**i for i in range(13)]\n",
      "print V\n",
      "\n",
      "#M = {x | x in S and x even}\n",
      "M = [x for x in S if x % 2 == 0]\n",
      "print M"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
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