python07.ipynb

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  {
   "cells": [
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "***\n",
      "# 7. \uc0ac\uc804(Dictionaries)\n",
      "***\n",
      "***"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "## 01 \uc804 \uac1d\uccb4\uc758 \uae30\ucd08 \uc5f0\uc0b0\n",
      "***\n",
      "- \uc0ac\uc804(Dictionary) \uac1d\uccb4\uc758 \ud2b9\uc9d5\n",
      "  - \uc9d1\ud569\uc801 \uc790\ub8cc\ud615\n",
      "  - \uc790\ub8cc\uc758 \uc21c\uc11c\ub97c \uc815\ud558\uc9c0 \uc54a\ub294 \ub9e4\ud551(Mapping)\ud615\n",
      "    - \ud0a4(Key)\ub97c \uc774\uc6a9\ud558\uc5ec \uac12(Value)\uc5d0 \uc811\uadfc\n",
      "  - \ud0a4\uc640 \uac12\uc758 \ub9e4\ud551 1\uac1c\ub97c \uc544\uc774\ud15c(item)\uc774\ub77c\uace0 \ubd80\ub984"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "member = {'basketball':5, 'soccer':11, 'baseball':9}\n",
      "member['baseball'] # \uac80\uc0c9"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 6,
       "text": [
        "9"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uac12\uc744 \uc800\uc7a5\ud560 \uc2dc\uc5d0 \ud0a4\ub97c \uc0ac\uc6a9\n",
      "  - \ud0a4\uac00 \uc5c6\ub2e4\uba74 \uc0c8\ub85c\uc6b4 \ud0a4\uc640 \uac12\uc758 \uc544\uc774\ud15c\uc774 \uc0dd\uc131\n",
      "  - \ud0a4\uac00 \uc774\ubbf8 \uc874\uc7ac\ud55c\ub2e4\uba74 \uadf8 \ud0a4\uc5d0 \ud574\ub2f9\ud558\ub294 \uac12\uc774 \ubcc0\uacbd"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "member = {'basketball':5, 'soccer':11, 'baseball':9}\n",
      "member['volleyball'] = 7 # \uc0c8\ub85c\uc6b4 \uc544\uc774\ud15c \uc124\uc815\n",
      "member['volleyball'] = 6 # \ubcc0\uacbd\n",
      "print member\n",
      "print len(member)        # \uc544\uc774\ud15c\uc758 \uac1c\uc218 \ubc18\ud658 "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'soccer': 11, 'basketball': 5, 'baseball': 9, 'volleyball': 6}\n",
        "4\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc0ac\uc804\uc744 \ucd9c\ub825\ud558\uba74 \uac01 \uc544\uc774\ud15c\ub4e4\uc774 \uc784\uc758\uc758 \uc21c\uc11c\ub85c \ucd9c\ub825\ub41c\ub2e4.\n",
      "- \uc0c8\ub85c\uc6b4 \uc544\uc774\ud15c\uc774 \ub4e4\uc5b4\uc624\uba74 \ud0a4 \ub0b4\uc6a9\uc5d0 \ub530\ub77c \uadf8 \uc21c\uc11c\uac00 \ub2ec\ub77c\uc9c4\ub2e4.\n",
      "- \ub0b4\ubd80\uc801\uc73c\ub85c \ud0a4 \ub0b4\uc6a9\uc5d0 \ub300\ud574 \ud574\uc26c(Hash) \uae30\ubc95\uc744 \uc0ac\uc6a9\n",
      "  - \uac80\uc0c9 \uc18d\ub3c4\uac00 \ub9e4\uc6b0 \ube60\ub984\n",
      "  - [\ucc38\uace0]: http://www.laurentluce.com/posts/python-dictionary-implementation/\n",
      "- \ud0a4\uc640 \uac12 \ub9e4\ud551\uc5d0 \ub300\ud55c \uc544\uc774\ud15c\uc744 \uc0ad\uc81c\ud560 \ub54c\uc5d0\ub294 del\uacfc \ud568\uaed8 \ud0a4\uac12 \uba85\uc2dc "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "member = {'basketball':5, 'soccer':11, 'baseball':9}\n",
      "del member['basketball'] # \ud56d\ubaa9 \uc0ad\uc81c\n",
      "print member"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'soccer': 11, 'baseball': 9}\n"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc0ac\uc804\uc5d0 \uc785\ub825\ub418\ub294 \uac12\uc740 \uc784\uc758\uc758 \uac1d\uccb4\n",
      "- [\ub9e4\uc6b0 \uc911\uc694] \ud0a4\ub294 \ubcc0\uacbd \ubd88\uac00\ub2a5 (Immutable) \uc790\ub8cc\ub9cc \uac00\ub2a5\n",
      "  - \ubb38\uc790\uc5f4, \uc22b\uc790, \ud29c\ud50c\uc740 \uac00\ub2a5\n",
      "  - \ub9ac\uc2a4\ud2b8, \uc0ac\uc804\uc740 \ud0a4\uac00 \ub420 \uc218 \uc5c6\uc74c"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "d = {}\n",
      "d['str'] = 'abc'\n",
      "d[1] = 4\n",
      "d[(1,2,3)] = 'tuple'\n",
      "d[[1,2,3]] = 'list'      # \ub9ac\uc2a4\ud2b8\ub294 \ud0a4\uac00 \ub420 \uc218 \uc5c6\ub2e4."
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "TypeError",
       "evalue": "unhashable type: 'list'",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-7-74462e683085>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[1;32m      3\u001b[0m \u001b[0md\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;36m4\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      4\u001b[0m \u001b[0md\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m2\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m3\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m'tuple'\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 5\u001b[0;31m \u001b[0md\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m2\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m3\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m'list'\u001b[0m      \u001b[0;31m# \ub9ac\uc2a4\ud2b8\ub294 \ud0a4\uac00 \ub420 \uc218 \uc5c6\ub2e4.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mTypeError\u001b[0m: unhashable type: 'list'"
       ]
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "d[{1:2}] = 3             # \uc0ac\uc804\uc740 \ud0a4\uac00 \ub420 \uc218 \uc5c6\ub2e4."
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "TypeError",
       "evalue": "unhashable type: 'dict'",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-8-bac5c5696879>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0md\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m{\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;36m2\u001b[0m\u001b[0;34m}\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;36m3\u001b[0m             \u001b[0;31m# \uc0ac\uc804\uc740 \ud0a4\uac00 \ub420 \uc218 \uc5c6\ub2e4.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mTypeError\u001b[0m: unhashable type: 'dict'"
       ]
      }
     ],
     "prompt_number": 8
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc774\ub984\uc740 \uc0ac\uc804\uc758 \ud0a4\ub098 \uac12\uc73c\ub85c \uc0ac\uc6a9 \uac00\ub2a5\ud568"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def add(a, b):\n",
      "    return a+b\n",
      "\n",
      "def sub(a, b):\n",
      "    return a-b\n",
      "\n",
      "action = {0: add, 1: sub}   # \ud568\uc218 \uc774\ub984\uc744 \uc0ac\uc804\uc758 \uac12\uc73c\ub85c \uc0ac\uc6a9\n",
      "print action[0](4, 5)\n",
      "print action[1](4, 5)\n",
      "print\n",
      "action2 = {add: 1, sub: 2}  # \ud568\uc218 \uc774\ub984\uc744 \uc0ac\uc804\uc758 \ud0a4\ub85c \uc0ac\uc6a9\n",
      "print action2[add]\n",
      "print add(4, 5)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "9\n",
        "-1\n",
        "\n",
        "1\n",
        "9\n"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc0ac\uc804\uc744 \uc0dd\uc131\ud558\ub294 \ub2e4\ub978 \ubc29\ubc95: \ub0b4\uc7a5\ud568\uc218 dict() \uc0ac\uc6a9"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "dict()\n",
      "print dict(one=1, two=2)\n",
      "print dict([('one', 1), ('two', 2)])    # \ucd94\ud6c4\uc5d0 \ubc30\uc6b0\ub294 items()\uc758 \uc5ed\ubcc0\ud658\uc5d0 \ud574\ub2f9\n",
      "print dict({'one':1, 'two':2})"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'two': 2, 'one': 1}\n",
        "{'two': 2, 'one': 1}\n",
        "{'two': 2, 'one': 1}\n"
       ]
      }
     ],
     "prompt_number": 15
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "keys = ['one', 'two', 'three']\n",
      "values = (1, 2, 3)\n",
      "print zip(keys, values)        # zip(): \ub450 \uac1c\uc758 \uc790\ub8cc\ub97c \uc21c\uc11c\ub300\ub85c \uc30d\uc73c\ub85c \ubb36\uc740 \ud29c\ud50c\ub4e4\uc758 \ub9ac\uc2a4\ud2b8 \ubc18\ud658\n",
      "print dict(zip(keys, values))"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "[('one', 1), ('two', 2), ('three', 3)]\n",
        "{'three': 3, 'two': 2, 'one': 1}\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "## 02 \uc0ac\uc804 \uac1d\uccb4\uc758 \uba54\uc3d8\ub4dc\n",
      "***\n",
      "- D.keys(): \uc0ac\uc804 D\uc5d0\uc11c \ud0a4\ub4e4\uc744 \ub9ac\uc2a4\ud2b8\ub85c \ubc18\ud658\n",
      "- D.values(): \uc0ac\uc804 D\uc5d0\uc11c \uac12\ub4e4\uc744 \ub9ac\uc2a4\ud2b8\ub85c \ubc18\ud658\n",
      "- D.items(): \uc0ac\uc804 D\uc5d0\uc11c \uac01 \uc544\uc774\ud15c\uc744 \ud29c\ud50c\ud615\ud0dc\ub85c \uac00\uc838\uc640 \ub9ac\uc2a4\ud2b8\ub85c \ubc18\ud658\n",
      "- key in D: \uc0ac\uc804 D\uc548\uc5d0 key\ub97c \ud0a4\uac12\uc744 \uac00\uc9c4 \uc544\uc774\ud15c\uc774 \uc788\ub294\uc9c0 \ud655\uc778"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "phone = {'jack':9465215, 'jin':1111, 'Joseph':6584321}\n",
      "\n",
      "print phone.keys() #\ud0a4\uc758 \ub9ac\uc2a4\ud2b8 \ubc18\ud658\n",
      "print phone.values() #\uac12\ub4e4\uc758 \ub9ac\uc2a4\ud2b8 \ubc18\ud658\n",
      "print phone.items() #(\ud0a4, \uac12)\uc758 \ub9ac\uc2a4\ud2b8 \ubc18\ud658\n",
      "print\n",
      "print 'jack' in phone #'jack'\uc774 phone\uc758 \ud0a4\uc5d0 \ud3ec\ud568\ub418\uc5b4 \uc788\ub294\uac00?\n",
      "print 'lee' in phone"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "['jin', 'Joseph', 'jack']\n",
        "[1111, 6584321, 9465215]\n",
        "[('jin', 1111), ('Joseph', 6584321), ('jack', 9465215)]\n",
        "\n",
        "True\n",
        "False\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- D2 = D.copy(): \uc0ac\uc804 D\ub97c \ubcf5\uc0ac\ud558\uc5ec D2 \uc0ac\uc804\uc5d0 \ud560\ub2f9\ud55c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "phone = {'jack':9465215, 'jin':1111, 'Joseph':6584321}\n",
      "p = phone            # \uc0ac\uc804 \ub808\ud37c\ub7f0\uc2a4 \ubcf5\uc0ac. \uc0ac\uc804 \uac1d\uccb4\ub294 \uacf5\uc720\ub41c\ub2e4.\n",
      "\n",
      "phone['jack'] = 1234 # phone\uc744 \ubcc0\uacbd\ud558\uba74\n",
      "print phone\n",
      "print p              # p\ub3c4 \ud568\uaed8 \ubcc0\uacbd\ub41c\ub2e4.\n",
      "print\n",
      "\n",
      "ph = phone.copy()    # \uc0ac\uc804\ubcf5\uc0ac. \ubcc4\ub3c4\uc758 \uc0ac\uc804 \uac1d\uccb4\uac00 \ub9c8\ub828\ub41c\ub2e4.\n",
      "phone['jack'] = 1111 # phone\uc744 \ubc14\uafd4\ub3c4\n",
      "print phone\n",
      "print ph             # ph\ub294 \ubc14\ub00c\uc9c0 \uc54a\ub294\ub2e4."
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'jin': 1111, 'Joseph': 6584321, 'jack': 1234}\n",
        "{'jin': 1111, 'Joseph': 6584321, 'jack': 1234}\n",
        "\n",
        "{'jin': 1111, 'Joseph': 6584321, 'jack': 1111}\n",
        "{'jin': 1111, 'Joseph': 6584321, 'jack': 1234}\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [\uc8fc\uc758] D.copy()\ub294 Shallow Copy\ub97c \uc218\ud589\ud55c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "phone = {'a': [1,2,3], 'b': 4}\n",
      "phone2 = phone.copy()\n",
      "print phone\n",
      "print phone2\n",
      "print\n",
      "\n",
      "phone['b'] = 100\n",
      "print phone\n",
      "print phone2\n",
      "print\n",
      "\n",
      "phone['a'][0] = 100\n",
      "print phone\n",
      "print phone2"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'a': [1, 2, 3], 'b': 4}\n",
        "{'a': [1, 2, 3], 'b': 4}\n",
        "\n",
        "{'a': [1, 2, 3], 'b': 100}\n",
        "{'a': [1, 2, 3], 'b': 4}\n",
        "\n",
        "{'a': [100, 2, 3], 'b': 100}\n",
        "{'a': [100, 2, 3], 'b': 4}\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "![image](images/shallow_copy.png)"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "ph = {'jack':9465215, 'jin':1111, 'Joseph':6584321}\n",
      "\n",
      "print ph.get('jack')  # 'jack'\uc5d0 \ub300\ud55c \uac12\uc744 \uc5bb\ub294\ub2e4. ph['jack']\uacfc \uac19\ub2e4.\n",
      "print ph.get('gslee') # 'gslee'\uc5d0 \ub300\ud55c \uac12\uc744 \uc5bb\ub294\ub2e4. \uac12\uc774 \uc5c6\ub294 \uacbd\uc6b0 None\ubc18\ud658"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "9465215\n",
        "None\n"
       ]
      }
     ],
     "prompt_number": 12
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "ph = {'jack':9465215, 'jin':1111, 'Joseph':6584321}\n",
      "print ph['gslee']     # ph['gslee']\ub294 \ud0a4\uac00 \uc5c6\ub294 \uacbd\uc6b0 \uc608\uc678\ubc1c\uc0dd"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "KeyError",
       "evalue": "'gslee'",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mKeyError\u001b[0m                                  Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-11-00dc298a68ec>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0mph\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m{\u001b[0m\u001b[0;34m'jack'\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;36m9465215\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m'jin'\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;36m1111\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m'Joseph'\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;36m6584321\u001b[0m\u001b[0;34m}\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m \u001b[0;32mprint\u001b[0m \u001b[0mph\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m'gslee'\u001b[0m\u001b[0;34m]\u001b[0m     \u001b[0;31m# ph['gslee']\ub294 \ud0a4\uac00 \uc5c6\ub294 \uacbd\uc6b0 \uc608\uc678\ubc1c\uc0dd\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mKeyError\u001b[0m: 'gslee'"
       ]
      }
     ],
     "prompt_number": 11
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "ph = {'jack':9465215, 'jin':1111, 'Joseph':6584321}\n",
      "print ph.get('gslee', 5284)        # \uc778\uc218\ub97c \ud558\ub098 \ub354 \uc81c\uacf5\ud558\uba74 'gslee'\uac00 \uc5c6\ub294 \uacbd\uc6b0\uc5d0 5284 \ub9ac\ud134\n",
      "print ph                           # \uc0ac\uc804\uc5d0\ub294 \ubcc0\ud654\uac00 \uc5c6\ub2e4\n",
      "print \n",
      "\n",
      "print ph.setdefault('gslee', 5284) # 'gslee'\uac12\uc744 \uaebc\ub0b4\ub418, \uc5c6\uc73c\uba74 \uc0c8\ub85c\uc6b4 \uc544\uc774\ud15c\uc73c\ub85c 'gslee': 5284\ub97c \ub123\uc5b4\uc8fc\uace0 \uaebc\ub0b8\ub2e4. \n",
      "print ph                           # 'gslee':5284\uac00 \uc124\uc815\ub418\uc5b4 \uc788\ub2e4. \n",
      "print \n",
      "\n",
      "print ph.popitem()                 # \uc784\uc758\uc758 \uc544\uc774\ud15c\uc744 \uaebc\ub0b8\ub2e4.\n",
      "print ph\n",
      "print ph.popitem()                 # \uc784\uc758\uc758 \uc544\uc774\ud15c\uc744 \uaebc\ub0b8\ub2e4.\n",
      "print ph \n",
      "print\n",
      "print ph.pop('jack')               # \ud0a4 \uac12\uc744 \ud1b5\ud574 \ud574\ub2f9 \uc544\uc774\ud15c\uc744 \uc9c0\uc815\ud558\uc5ec \uaebc\ub0b8\ub2e4.\n",
      "print ph"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "5284\n",
        "{'jin': 1111, 'Joseph': 6584321, 'jack': 9465215}\n",
        "\n",
        "5284\n",
        "{'jin': 1111, 'Joseph': 6584321, 'jack': 9465215, 'gslee': 5284}\n",
        "\n",
        "('jin', 1111)\n",
        "{'Joseph': 6584321, 'jack': 9465215, 'gslee': 5284}\n",
        "('Joseph', 6584321)\n",
        "{'jack': 9465215, 'gslee': 5284}\n",
        "\n",
        "9465215\n",
        "{'gslee': 5284}\n"
       ]
      }
     ],
     "prompt_number": 16
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "phone = {'jack':9465215, 'jin':1111, 'Joseph':6584321}\n",
      "ph = {'kim':12312, 'lee': 9090}\n",
      "phone.update(ph) #\uc0ac\uc804 phone\uc758 \ub0b4\uc6a9\uc744 ph\uc73c\ub85c \ucd94\uac00 \uac31\uc2e0\n",
      "print phone\n",
      "print\n",
      "phone.clear() #\uc0ac\uc804\uc758 \ubaa8\ub4e0 \uc785\ub825\uc744 \uc5c6\uc564\ub2e4.\n",
      "print phone"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'jin': 1111, 'Joseph': 6584321, 'jack': 9465215, 'kim': 12312, 'lee': 9090}\n",
        "\n",
        "{}\n"
       ]
      }
     ],
     "prompt_number": 19
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "## 03 \uc2ec\ubcfc \ud14c\uc774\ube14\n",
      "***\n",
      "- \\_\\_\uc2ec\ubcfc__ : Private \ubcc0\uc218\ub098 \uba54\uc18c\ub4dc"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print __name__      # \ud604\uc7ac \ubaa8\ub4c8\uc758 \uc774\ub984\n",
      "print\n",
      "import sys\n",
      "print sys.__name__  # sys \ubaa8\ub4c8\uc758 \uc774\ub984"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "__main__\n",
        "\n",
        "sys\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc2ec\ubcfc \ud14c\uc774\ube14: http://en.wikipedia.org/wiki/Symbol_table\n",
      "  - \ucef4\ud30c\uc77c\ub7ec\ub098 \uc778\ud130\ud504\ub9ac\ud130\uc5d0 \uc758\ud574 \uc0ac\uc6a9\ub418\ub294 \uc790\ub8cc \uad6c\uc870\ub85c\uc11c \ud504\ub85c\uadf8\ub7a8 \uc18c\uc2a4 \ucf54\ub4dc\uc5d0 \uc874\uc7ac\ud558\ub294 \uac01 \uc2dd\ubcc4\uc790 (\ubcc0\uc218 \uc774\ub984, \uc0c1\uc218 \uc774\ub984, \ud568\uc218 \uc774\ub984 \ub4f1)\uc5d0 \ub300\ud574 \uad00\ub828\ub41c \uc815\ubcf4 (\ud0c0\uc785, \ubc94\uc704(Scope), \uba54\ubaa8\ub9ac \uc704\uce58)\ub97c \ud568\uaed8 \uc800\uc7a5\ud574\ub454\ub2e4."
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 3-1 \uc804\uc5ed/\uc9c0\uc5ed \uc2ec\ubcfc \ud14c\uc774\ube14"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a = 1\n",
      "b = 100\n",
      "name = 'gslee'\n",
      "dic = {'Python':'Good', 'Perl':'Not Good'}"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- globals(): \uc804\uc5ed \uc2ec\ubcfc \ud14c\uc774\ube14\uc744 \ud3ec\ud568\ud55c \uc0ac\uc804 \ubc18\ud658 \n",
      "- locals(): \uc9c0\uc5ed \uc2ec\ubcfc \ud14c\uc774\ube14\uc744 \ud3ec\ud568\ud55c \uc0ac\uc804 \ubc18\ud658"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print globals()\n",
      "print locals()\n",
      "\n",
      "def func():\n",
      "  a = 10\n",
      "  print globals()\n",
      "  print locals()\n",
      "\n",
      "func()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 3-2 \ud074\ub798\uc2a4\uc640 \uac1d\uccb4\uc758 \uc2ec\ubcfc \ud14c\uc774\ube14\n",
      "  - https://docs.python.org/2/library/functions.html#vars\n",
      "  - \ub300\uc0c1.\\__dict__ :  \uc784\uc758\uc758 \ub300\uc0c1\ub4e4\uc774 \uc9c0\ub2c8\uace0 \uc788\ub294 \uc2dd\ubcc4\uc790\uc640 \uadf8 \uc2dd\ubcc4\uc790\uc640 \uc5f0\ub3d9\ub41c \uac12\uc774 \uc0ac\uc804(Dictionary) \ud615\ud0dc\ub85c \uc800\uc7a5\ub418\uc5b4 \uc788\ub2e4. "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "class C:\n",
      "    x = 10\n",
      "    y = 20\n",
      "\n",
      "print C.__dict__ # \ud074\ub798\uc2a4\uc758 \uc2ec\ubcfc \ud14c\uc774\ube14\uc744 \uc5bb\ub294\ub2e4.\n",
      "print vars(C)    # vars(C)\ub294 \ub0b4\ubd80\uc801\uc73c\ub85c C.__dict__ \uc758 \uac12\uc744 \ubc18\ud658\ud55c\ub2e4. "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'y': 20, 'x': 10, '__module__': '__main__', '__doc__': None}\n",
        "{'y': 20, 'x': 10, '__module__': '__main__', '__doc__': None}\n"
       ]
      }
     ],
     "prompt_number": 31
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "c = C()          # \ud074\ub798\uc2a4 C\ub85c\ubd80\ud130 \uac1d\uccb4 c \uc0dd\uc131\n",
      "c.x = 100\n",
      "c.y = 200\n",
      "print c.__dict__ # \ud074\ub798\uc2a4 \uc778\uc2a4\ud134\uc2a4\uc758 \uc2ec\ubcfc \ud14c\uc774\ube14\uc744 \uc5bb\ub294\ub2e4.\n",
      "print vars(c)\n",
      "print\n",
      "print C.__dict__ # \ud074\ub798\uc2a4\uc758 \uc2ec\ubcfc \ud14c\uc774\ube14\uc744 \uc5bb\ub294\ub2e4.\n",
      "print vars(C)    # vars(C)\ub294 \ub0b4\ubd80\uc801\uc73c\ub85c C.__dict__ \uc758 \uac12\uc744 \ubc18\ud658\ud55c\ub2e4. "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'y': 200, 'x': 100}\n",
        "{'y': 200, 'x': 100}\n",
        "\n",
        "{'y': 20, 'x': 10, '__module__': '__main__', '__doc__': None}\n",
        "{'y': 20, 'x': 10, '__module__': '__main__', '__doc__': None}\n"
       ]
      }
     ],
     "prompt_number": 32
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def f():\n",
      "    pass\n",
      "\n",
      "f.a = 1\n",
      "f.b = 2\n",
      "print f.__dict__ # \ud568\uc218\uc758 \uc2ec\ubcfc \ud14c\uc774\ube14\uc744 \uc5bb\ub294\ub2e4."
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'a': 1, 'b': 2}\n"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "## 04 \uc0ac\uc804\uc744 for\ubb38\uc73c\ub85c \ucc38\uc870\ud558\uae30\n",
      "***"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc0ac\uc804\uc758 \ubaa8\ub4e0 \ud0a4\uac12\uc744 \uc21c\ucc28\uc801\uc73c\ub85c \ucc38\uc870\ud558\ub294 \ubc29\ubc95"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "D = {'a':1, 'b':2, 'c':3}\n",
      "for key in D.keys():\n",
      "    print key, D[key]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "a 1\n",
        "c 3\n",
        "b 2\n"
       ]
      }
     ],
     "prompt_number": 15
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc0ac\uc804 \uc790\uccb4\ub97c for\ub8e8\ud504\uc5d0 \ud65c\uc6a9\ud558\uba74 \ud0a4\uc5d0 \ub300\ud55c \ub8e8\ud504\uac00 \uc2e4\ud589\ub41c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "D = {'a':1, 'b':2, 'c':3}\n",
      "for key in D:\n",
      "    print key, D[key]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "a 1\n",
        "c 3\n",
        "b 2\n"
       ]
      }
     ],
     "prompt_number": 16
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud0a4\uc640 \uac12\uc744 \ub3d9\uc2dc\uc5d0 \ucc38\uc870\ud558\ub824\uba74 D.items()\ub97c \ud65c\uc6a9\ud55c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "for key, value in D.items():\n",
      "    print key, value"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "a 1\n",
        "c 3\n",
        "b 2\n"
       ]
      }
     ],
     "prompt_number": 17
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc0ac\uc804\uc5d0 \uc785\ub825\ub41c \uc544\uc774\ud15c\ub4e4\uc740 \uc77c\uc815\ud55c \uc21c\uc11c\uac00 \uc5c6\ub2e4.\n",
      "- \ud0a4\uac12\uc5d0 \ub300\ud55c \uc815\ub82c\uc740 \uc544\uc774\ud15c\ub4e4\uc744 \ub9ac\uc2a4\ud2b8\ub85c \ubf51\uc740 \ub2e4\uc74c\uc5d0 \ud574\ub2f9 \ub9ac\uc2a4\ud2b8\uc5d0 \uc788\ub294 sort() \ud568\uc218\ub97c \ud65c\uc6a9\ud55c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "D = {'a':1, 'b':2, 'c':3}\n",
      "items = D.items()\n",
      "print items\n",
      "print\n",
      "\n",
      "items.sort()\n",
      "print items\n",
      "print \n",
      "\n",
      "for k,v in items:\n",
      "    print k, v"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "[('a', 1), ('c', 3), ('b', 2)]\n",
        "\n",
        "[('a', 1), ('b', 2), ('c', 3)]\n",
        "\n",
        "a 1\n",
        "b 2\n",
        "c 3\n"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "d = {'one':1, 'two':2, 'three':3}\n",
      "L = d.items()\n",
      "print L\n",
      "print\n",
      "\n",
      "L.sort()\n",
      "print L"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "[('three', 3), ('two', 2), ('one', 1)]\n",
        "\n",
        "[('one', 1), ('three', 3), ('two', 2)]\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ub78c\ub2e4(lamda) \ud568\uc218 \ub610\ub294 \ucd95\uc57d \ud568\uc218: https://wikidocs.net/64\n",
      "  - \uc77c\ubc18\uc801\uc778 \ud568\uc218\ub97c \ud55c \uc904\uc758 \ubb38(Statement)\ub85c \uc815\uc758\ud560 \uc218 \uc788\ub294 \uc0c8\ub85c\uc6b4 \ud568\uc218 \uc815\uc758 \ub9ac\ud130\ub7f4\n",
      "    - \ud568\uc218 \ubab8\uccb4\uc5d0\ub294 \uc2dd(expression)\ub9cc\uc774 \uc62c \uc218 \uc788\ub2e4. \n",
      "  - \ub300\ubd80\ubd84\uc758 \uacbd\uc6b0 \ud568\uc218 \uc774\ub984\uc744 \uc815\uc758\ud558\uc9c0 \uc54a\uc73c\uba74\uc11c \uc77c\ud68c\uc131\uc73c\ub85c \ud65c\uc6a9\ud560 \ud568\uc218\ub97c \uc815\uc758\ud560 \ub54c \ud65c\uc6a9\n",
      "  - \uad6c\ubb38\n",
      "    - lambda \ucf64\ub9c8\ub85c \uad6c\ubd84\ub41c \uc778\uc218\ub4e4: \uc2dd(expression)\n",
      "  - <pre>>>> def hap(x, y):\n",
      "...   return x + y\n",
      "...\n",
      ">>> hap(10, 20)\n",
      "30\n",
      "</pre>\n",
      "  - <pre>\n",
      ">>> (lambda x,y: x + y)(10, 20)\n",
      "30\n",
      "</pre>"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "d = {'three':3, 'two':2, 'one':1}\n",
      "L = d.items()\n",
      "print L\n",
      "print\n",
      "\n",
      "L.sort(key=lambda item:item[1])      #lamda item:item[1] ==> f(item): return item[1]\n",
      "print L"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "[('one', 1), ('three', 3), ('two', 2)]\n",
        "\n",
        "[('one', 1), ('two', 2), ('three', 3)]\n"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "d = {'three':3, 'two':2, 'one':1}\n",
      "for key, value in sorted(d.items(), key=lambda item:item[1]):\n",
      "    print key, value"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "one 1\n",
        "two 2\n",
        "three 3\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [\uc608\uc81c 1]\n",
      "  - \uc0ac\uc804\uc5d0 \uc774\ub984\uacfc \uc804\ud654\ubc88\ud638\ub97c \ub4f1\ub85d\ud558\uace0 \ucd9c\ub825\ud55c\ub2e4. "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# file : directory.py\n",
      "\n",
      "def print_menu():\n",
      "    print '1. \uc804\ud654 \ubc88\ud638 \ucd9c\ub825'\n",
      "    print '2. \uc804\ud654 \ubc88\ud638 \ucd94\uac00'\n",
      "    print '3. \uc804\ud654 \ubc88\ud638 \uc0ad\uc81c'\n",
      "    print '4. \uc804\ud654 \ubc88\ud638 \ucc3e\uae30'\n",
      "    print '5. \uc885\ub8cc'\n",
      "    print\n",
      "    \n",
      "def print_dic(numbers):\n",
      "    print \"\uc804\ud654\ubc88\ud638: \"\n",
      "    for name in numbers :\n",
      "        print \"\uc774\ub984: \", name,\" \\t\ubc88\ud638: \",numbers[name]\n",
      "    print\n",
      "    \n",
      "def add_member(numbers):\n",
      "    print \"\uc774\ub984\uacfc \ubc88\ud638 \ucd94\uac00\"\n",
      "    name = raw_input(\"\uc774\ub984: \")\n",
      "    phone = raw_input(\"\ubc88\ud638: \")\n",
      "    numbers[name] = phone\n",
      "\n",
      "def remove_member(numbers):\n",
      "    print \"\uc774\ub984\uacfc \ubc88\ud638 \uc0ad\uc81c\"\n",
      "    name = raw_input(\"\uc774\ub984: \")\n",
      "    if name in numbers:\n",
      "        del numbers[name]\n",
      "    else:\n",
      "        print name, \" \uc740 \uc5c6\uc2b5\ub2c8\ub2e4.\"\n",
      "        \n",
      "def lookup_member(numbers):\n",
      "    print \"\ubc88\ud638 \ucc3e\uae30\"\n",
      "    name = raw_input(\"\uc774\ub984: \")\n",
      "    if name in numbers:\n",
      "        print \"\ubc88\ud638 : \", numbers[name]\n",
      "    else :\n",
      "        print name, \"\ub97c \ucc3e\uc744 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.\"\n",
      "        \n",
      "#------------------- \uc5ec\uae30\uc11c \ubd80\ud130 \uc2e4\ud589\ub41c\ub2e4.\n",
      "\n",
      "numbers = {}\n",
      "menu_choice = 0\n",
      "print_menu()\n",
      "while menu_choice != 5:\n",
      "    menu_choice = input(\"\ubc88\ud638\ub97c \uc785\ub825\ud574 \uc8fc\uc138\uc694 (1-5):\")\n",
      "    if menu_choice == 1:\n",
      "        print_dic(numbers)\n",
      "    elif menu_choice == 2:\n",
      "        add_member(numbers)\n",
      "    elif menu_choice == 3:\n",
      "        remove_member(numbers)\n",
      "    elif menu_choice == 4:\n",
      "        lookup_member(numbers)\n",
      "    if menu_choice != 5:\n",
      "        print_menu()\n",
      "    "
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [\uc608\uc81c 2]\n",
      "  - \ud568\uc218 \ub808\ud37c\ub7f0\uc2a4\ub97c \uc0ac\uc804\uc5d0 \uc800\uc7a5\ud574 \ub450\uace0 \ud574\ub2f9 \ud568\uc218\ub97c \uaebc\ub0b4\uc5b4\uc11c \ud638\ucd9c\ud55c\ub2e4. "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#arith.py\n",
      "def add(a, b):\n",
      "    return a+b\n",
      "\n",
      "def sub(a, b):\n",
      "    return a-b\n",
      "\n",
      "def mul(a, b):\n",
      "    return a*b\n",
      "\n",
      "def div(a, b):\n",
      "    return a/b\n",
      "\n",
      "def choose_menu():\n",
      "    print 'What do you want to do?'\n",
      "    print 'add, sub, mul, div, quit'\n",
      "    return raw_input('Your choice: ')\n",
      "\n",
      "# \ud0a4\ub294 \uc5f0\uc0b0\uc758 \uc774\ub984, \uac12\uc740 \ud568\uc218 \uac1d\uccb4\n",
      "menu = {'add':add, 'sub':sub, 'mul':mul, 'div':div}\n",
      "choice = choose_menu()\n",
      "while choice != 'quit':\n",
      "    if choice in menu :\n",
      "        x = input('first value : ')\n",
      "        y = input('Second value : ')\n",
      "        print menu[choice](x,y)\n",
      "    choice = choose_menu()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "What do you want to do?\n",
        "add, sub, mul, div, quit\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Your choice: sub\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "first value : 1\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Second value : 2\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "-1\n",
        "What do you want to do?\n",
        "add, sub, mul, div, quit\n"
       ]
      }
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "## 05 \uc9d1\ud569 \uc790\ub8cc\ud615\n",
      "***\n",
      "- set\uc740 \ubcc0\uacbd \ubd88\uac00\ub2a5(Immutable)\ud55c \uc6d0\uc18c\ub4e4\uc744 \uc9c0\ub2c8\ub294 \ubcc0\uacbd \uac00\ub2a5(Mutable)\ud55c \uac1d\uccb4\uc774\ub2e4.\n",
      "  - \uac01 \uc6d0\uc18c\uac04\uc5d0 \uc21c\uc11c\ub294 \uc5c6\ub2e4.\n",
      "  - \uac01 \uc6d0\uc18c\ub294 \uc911\ubcf5\ub420 \uc218 \uc5c6\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a = set([1, 2, 3])\n",
      "print type(a)\n",
      "print a\n",
      "print\n",
      "\n",
      "b=set((1, 2, 3))\n",
      "print type(b)\n",
      "print b\n",
      "print\n",
      "\n",
      "c=set({'a':1, 'b':2, 'c':3})\n",
      "print type(c)\n",
      "print c\n",
      "print\n",
      "\n",
      "d=set({'a':1, 'b':2, 'c':3}.values())\n",
      "print type(d)\n",
      "print d"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "<type 'set'>\n",
        "set([1, 2, 3])\n",
        "\n",
        "<type 'set'>\n",
        "set([1, 2, 3])\n",
        "\n",
        "<type 'set'>\n",
        "set(['a', 'c', 'b'])\n",
        "\n",
        "<type 'set'>\n",
        "set([1, 2, 3])\n"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print set()                  # \ube48 set \uac1d\uccb4 \uc0dd\uc131\n",
      "print set([1,2,3,4,5])       # \ucd08\uae30 \uac12\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \uc2dc\ud000\uc2a4 \uc790\ub8cc\ud615\uc778 \ub9ac\uc2a4\ud2b8\ub97c \ub123\uc5b4\uc900\ub2e4.\n",
      "print set([1,2,3,2,3,4])     # \uc911\ubcf5\ub41c \uc6d0\uc18c\ub294 \ud55c \ubc88\ub9cc \ud45c\ud604\n",
      "print set('abc')             # \ubb38\uc790\uc5f4\uc740 \uac01 \ubb38\uc790\ub97c \uc9d1\ud569 \uc6d0\uc18c\ub85c \uc9c0\ub2cc\ub2e4.  \n",
      "print set([(1,2,3),(4,5,6)]) # \uac01 \ud29c\ud50c\uc740 \uc6d0\uc18c\ub85c \uac00\uc9c8 \uc218 \uc788\uc74c \n",
      "print set([[1,2,3],[4,5,6]]) # \ubcc0\uacbd \uac00\ub2a5 \uc790\ub8cc\uc778 \ub9ac\uc2a4\ud2b8\ub294 \uc9d1\ud569\uc758 \uc6d0\uc18c\uac00 \ub420 \uc218 \uc5c6\ub2e4."
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "set([])\n",
        "set([1, 2, 3, 4, 5])\n",
        "set([1, 2, 3, 4])\n",
        "set(['a', 'c', 'b'])\n",
        "set([(4, 5, 6), (1, 2, 3)])\n"
       ]
      },
      {
       "ename": "TypeError",
       "evalue": "unhashable type: 'list'",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-1-7f19fe538c1f>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[1;32m      4\u001b[0m \u001b[0;32mprint\u001b[0m \u001b[0mset\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'abc'\u001b[0m\u001b[0;34m)\u001b[0m             \u001b[0;31m# \ubb38\uc790\uc5f4\uc740 \uac01 \ubb38\uc790\ub97c \uc9d1\ud569 \uc6d0\uc18c\ub85c \uc9c0\ub2cc\ub2e4.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      5\u001b[0m \u001b[0;32mprint\u001b[0m \u001b[0mset\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m2\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m3\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m4\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m5\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m6\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m \u001b[0;31m# \uac01 \ud29c\ud50c\uc740 \uc6d0\uc18c\ub85c \uac00\uc9c8 \uc218 \uc788\uc74c\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 6\u001b[0;31m \u001b[0;32mprint\u001b[0m \u001b[0mset\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m2\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m3\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m4\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m5\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m6\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m \u001b[0;31m# \ubcc0\uacbd \uac00\ub2a5 \uc790\ub8cc\uc778 \ub9ac\uc2a4\ud2b8\ub294 \uc9d1\ud569\uc758 \uc6d0\uc18c\uac00 \ub420 \uc218 \uc5c6\ub2e4.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mTypeError\u001b[0m: unhashable type: 'list'"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print set(((1, 2), (1, 2)))   # \ub3d9\uc77c\ud55c \ub0b4\uc6a9\uc758 \ud29c\ud50c 2\uac1c\ub294 \uc9d1\ud569 \ub0b4\uc5d0 \ud55c \uac1c\uc758 \uc6d0\uc18c\ub85c \uc800\uc7a5\ub41c\ub2e4.\n",
      "print set([(1, 2), (1, 2)])"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "set([(1, 2)])\n",
        "set([(1, 2)])\n"
       ]
      }
     ],
     "prompt_number": 21
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- set\uc758 \uae30\ubcf8 \uc5f0\uc0b0 \uba54\uc18c\ub4dc\uc640 \uc5f0\uc0b0\uc790\n",
      "\n",
      "|          set \uc5f0\uc0b0         | \ub3d9\uc77c \uc5f0\uc0b0\uc790 | \ub0b4\uc6a9                        |\n",
      "|---------------------------|-------------|-----------------------------|\n",
      "| len(s)                    |             | \uc6d0\uc18c\uc758 \uac1c\uc218                 |\n",
      "| x in s                    |             | x\uac00 \uc9d1\ud569 s\uc758 \uc6d0\uc18c\uc778\uac00?      |\n",
      "| x not in s                |             | x\uac00 \uc9d1\ud569 s\uc758 \uc6d0\uc18c\uac00 \uc544\ub2cc\uac00? |\n",
      "| s.issubset(t)             | s <= t      | s\uac00 t\uc758 \ubd80\ubd84\uc9d1\ud569\uc778\uac00?       |\n",
      "| s.issuperset(t)           | s >= t      | s\uac00 t\uc758 \uc288\ud37c\uc9d1\ud569\uc778\uac00?       |\n",
      "| s.union(t)                | s &#124; t       | \uc0c8\ub85c\uc6b4 s\uc640 t\uc758 \ud569\uc9d1\ud569       |\n",
      "| s.intersection(t)         | s & t       | \uc0c8\ub85c\uc6b4 s\uc640 t\uc758 \uad50\uc9d1\ud569       |\n",
      "| s.difference(t)           | s - t       | \uc0c8\ub85c\uc6b4 s\uc640 t\uc758 \ucc28\uc9d1\ud569       |\n",
      "| s.symmetric_difference(t) | s ^ t       | \uc0c8\ub85c\uc6b4 s\uc640 t\uc758 \ubc30\ud0c0\uc9d1\ud569     |\n",
      "| s.copy()                  |             | \uc9d1\ud569 s\uc758 shallow \ubcf5\uc0ac      |"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "A = set([1,2,3,4,5,6,7,8,9])\n",
      "\n",
      "print len(A)      # \uc9d1\ud569\uc758 \uc6d0\uc18c\uc758 \uc218\n",
      "print 5 in A      # \uba64\ubc84\uc2ed \ud14c\uc2a4\ud2b8\n",
      "print 10 not in A # \uba64\ubc84\uc2ed \ud14c\uc2a4\ud2b8"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "9\n",
        "True\n",
        "True\n"
       ]
      }
     ],
     "prompt_number": 34
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "B = set([4,5,6,10,20,30])\n",
      "C = set([10,20,30])\n",
      "\n",
      "print C.issubset(B)    # C\uac00 B\uc758 \ubd80\ubd84\uc9d1\ud569?\n",
      "print C <= B\n",
      "print B.issuperset(C)  # B\uac00 C\ub97c \ud3ec\ud568\ud558\ub294 \uc9d1\ud569?\n",
      "print B >= C\n",
      "print"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "True\n",
        "True\n",
        "True\n",
        "True\n",
        "\n"
       ]
      }
     ],
     "prompt_number": 33
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "A = set([1,2,3,4,5,6,7,8,9])\n",
      "B = set([4,5,6,10,20,30])\n",
      "\n",
      "print A.union(B) #A\uc640 B\uc758 \ud569\uc9d1\ud569\n",
      "print A|B\n",
      "print A\n",
      "print\n",
      "\n",
      "print A.intersection(B) #A\uc640 B\uc758 \uad50\uc9d1\ud569\n",
      "print A&B #A\uc640 B\uc758 \uad50\uc9d1\ud569\n",
      "print A\n",
      "print\n",
      "\n",
      "print A.difference(B) #A - B (\ucc28\uc9d1\ud569)\n",
      "print A-B #A - B (\ucc28\uc9d1\ud569)\n",
      "print A\n",
      "print\n",
      "\n",
      "print A.symmetric_difference(B) #\ubca0\ud0c0\uc9d1\ud569. A,B \ud569\uc9d1\ud569\uc5d0\uc11c \uad50\uc9d1\ud569\uc758 \uc6d0\uc18c\ub97c \uc81c\uc678\ud55c \uc9d1\ud569\n",
      "print A^B\n",
      "print A"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "set([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30])\n",
        "set([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30])\n",
        "set([1, 2, 3, 4, 5, 6, 7, 8, 9])\n",
        "\n",
        "set([4, 5, 6])\n",
        "set([4, 5, 6])\n",
        "set([1, 2, 3, 4, 5, 6, 7, 8, 9])\n",
        "\n",
        "set([1, 2, 3, 7, 8, 9])\n",
        "set([1, 2, 3, 7, 8, 9])\n",
        "set([1, 2, 3, 4, 5, 6, 7, 8, 9])\n",
        "\n",
        "set([1, 2, 3, 7, 8, 9, 10, 20, 30])\n",
        "set([1, 2, 3, 7, 8, 9, 10, 20, 30])\n",
        "set([1, 2, 3, 4, 5, 6, 7, 8, 9])\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "A = set([1,2,3,4,5,6,7,8,9])\n",
      "D = A.copy()                # Shallow \ubcf5\uc0ac\n",
      "print D\n",
      "print\n",
      "\n",
      "print A == D #\uc790\ub8cc\uac12 \ube44\uad50\n",
      "print A is D #\uac1d\uccb4 \ub3d9\ub4f1\uc131 \ube44\uad50"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "set([1, 2, 3, 4, 5, 6, 7, 8, 9])\n",
        "\n",
        "True\n",
        "False\n"
       ]
      }
     ],
     "prompt_number": 39
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- set\uc740 \uc2dc\ud000\uc2a4 \uc790\ub8cc\ud615\uc774 \uc544\ub2c8\ubbc0\ub85c \uc778\ub371\uc2f1, \uc2ac\ub77c\uc774\uc2f1, \uc815\ub82c \ub4f1\uc744 \uc9c0\uc6d0\ud558\uc9c0 \uc54a\ub294\ub2e4. "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "A = set([1,2,3,4,5,6,7,8,9])\n",
      "print A[0]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "TypeError",
       "evalue": "'set' object does not support indexing",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-9-a0fca37959a3>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0mA\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mset\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m2\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m3\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m4\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m5\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m6\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m7\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m8\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m9\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m \u001b[0;32mprint\u001b[0m \u001b[0mA\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mTypeError\u001b[0m: 'set' object does not support indexing"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print A[1:4]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "TypeError",
       "evalue": "'set' object has no attribute '__getitem__'",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-13-795e14598526>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;32mprint\u001b[0m \u001b[0mA\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m1\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;36m4\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mTypeError\u001b[0m: 'set' object has no attribute '__getitem__'"
       ]
      }
     ],
     "prompt_number": 13
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print A.sort()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "AttributeError",
       "evalue": "'set' object has no attribute 'sort'",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-11-9fbe6777337f>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;32mprint\u001b[0m \u001b[0mA\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0msort\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mAttributeError\u001b[0m: 'set' object has no attribute 'sort'"
       ]
      }
     ],
     "prompt_number": 11
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc9d1\ud569\uc744 \ub9ac\uc2a4\ud2b8\ub098 \ud29c\ud50c\ub85c \ubcc0\uacbd\uac00\ub2a5\n",
      "  - \uc9d1\ud569\uc5d0 \uc778\ub371\uc2f1, \uc2ac\ub77c\uc774\uc2f1, \uc815\ub82c \ub4f1\uc744 \uc801\uc6a9\ud558\uae30 \uc704\ud574\uc11c\ub294 \ub9ac\uc2a4\ud2b8\ub098 \ud29c\ud50c\ub85c \ubcc0\uacbd\ud55c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print list(A)\n",
      "print tuple(A)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "[1, 2, 3, 4, 5, 6, 7, 8, 9]\n",
        "(1, 2, 3, 4, 5, 6, 7, 8, 9)\n"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud558\uc9c0\ub9cc \uc9d1\ud569\uc5d0 for ~ in \uc5f0\uc0b0\uc740 \uc801\uc6a9 \uac00\ub2a5\ud558\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "A = set([1,2,3,4,5,6,7,8,9])\n",
      "for ele in A:\n",
      "    print ele,"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1 2 3 4 5 6 7 8 9\n"
       ]
      }
     ],
     "prompt_number": 15
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- set\uc740 \ubcc0\uacbd \uac00\ub2a5(Mutable)\ud55c \uc790\ub8cc \uad6c\uc870 \uac1d\uccb4 \n",
      "- \ub2e4\uc74c \uba54\uc18c\ub4dc\ub4e4\uc740 set\uc744 \ubcc0\uacbd\ud558\ub294 \uc9d1\ud569 \uc790\ub8cc \uad6c\uc870 \uba54\uc18c\ub4dc\ub4e4\uc784\n",
      "\n",
      "|          set \uc5f0\uc0b0         | \ub3d9\uc77c \uc5f0\uc0b0\uc790 | \ub0b4\uc6a9                        |\n",
      "|---------------------------|-------------|-----------------------------|\n",
      "| s.update(t)               | s &#124;= t      | s\uc640 t\uc758 \ud569\uc9d1\ud569\uc744 s\uc5d0 \uc800\uc7a5      |\n",
      "| s.intersection_update(t)  | s &= t      | s\uc640 t\uc758 \uad50\uc9d1\ud569\uc744 s\uc5d0 \uc800\uc7a5      |\n",
      "| s.difference_update(t)    | s -= t      | s\uc640 t\uc758 \ucc28\uc9d1\ud569\uc744 s\uc5d0 \uc800\uc7a5      |\n",
      "| s.symmetric_difference_update(t)| s ^= t  | s\uc640 t\uc758 \ubc30\ud0c0\uc9d1\ud569\uc744 s\uc5d0 \uc800\uc7a5     |\n",
      "| s.add(x)                  |             | \uc6d0\uc18c x\ub97c \uc9d1\ud569 s\uc5d0 \ucd94\uac00      |\n",
      "| s.remove(x)               |             | \uc6d0\uc18c x\ub97c \uc9d1\ud569 s\uc5d0\uc11c \uc81c\uac70, \uc6d0\uc18c x\uac00 \uc9d1\ud569 s\uc5d0 \uc5c6\uc73c\uba74 \uc608\uc678 \ubc1c\uc0dd       |\n",
      "| s.discard(x)              |             | \uc6d0\uc18c x\ub97c \uc9d1\ud569 s\uc5d0\uc11c \uc81c\uac70       |\n",
      "| s.pop()                   |             | \uc784\uc758\uc758 \uc6d0\uc18c\ub97c \uc9d1\ud569 s\uc5d0\uc11c \uc81c\uac70, \uc9d1\ud569 s\uac00 \uacf5\uc9d1\ud569\uc774\uba74 \uc608\uc678 \ubc1c\uc0dd       |\n",
      "| s.clear()                 |             | \uc9d1\ud569 s\uc758 \ubaa8\ub4e0 \uc6d0\uc18c \uc81c\uac70     |"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "A = set([1,2,3,4])\n",
      "B = set([3,4,5,6])\n",
      "\n",
      "A.update(B) # A\uc5d0 B \uc9d1\ud569\uc758 \uc6d0\uc18c\ub97c \ucd94\uac00 \uc2dc\ud0b4\n",
      "print A\n",
      "\n",
      "A.intersection_update([4,5,6,7,8])     # &=\n",
      "print A\n",
      "\n",
      "A.difference_update([6,7,8])           # -=\n",
      "print A\n",
      "\n",
      "A.symmetric_difference_update([5,6,7]) # ^=\n",
      "print A\n",
      "\n",
      "A.add(8)    # \uc6d0\uc18c \ucd94\uac00\n",
      "print A\n",
      "\n",
      "A.remove(8) # \uc6d0\uc18c \uc81c\uac70\n",
      "print A"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "set([1, 2, 3, 4, 5, 6])\n",
        "set([4, 5, 6])\n",
        "set([4, 5])\n",
        "set([4, 6, 7])\n",
        "set([8, 4, 6, 7])\n",
        "set([4, 6, 7])\n"
       ]
      }
     ],
     "prompt_number": 40
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "A.remove(10) #\uc5c6\ub294 \uc6d0\uc18c\ub97c \uc81c\uac70\ud558\uba74 KeyError \ubc1c\uc0dd"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "KeyError",
       "evalue": "10",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mKeyError\u001b[0m                                  Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-21-1bcb28846ad3>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mA\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mremove\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m10\u001b[0m\u001b[0;34m)\u001b[0m \u001b[0;31m#\uc5c6\ub294 \uc6d0\uc18c\ub97c \uc81c\uac70\ud558\uba74 KeyError \ubc1c\uc0dd\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mKeyError\u001b[0m: 10"
       ]
      }
     ],
     "prompt_number": 21
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "A.discard(10) #remove\uc640 \uac19\uc73c\ub098 \uc608\uc678\uac00 \ubc1c\uc0dd\ud558\uc9c0 \uc54a\uc74c\n",
      "A.discard(6) #\uc6d0\uc18c 6\uc81c\uac70\n",
      "print A\n",
      "\n",
      "A.pop() #\uc784\uc758\uc758 \uc6d0\uc18c \ud558\ub098 \uaebc\ub0b4\uae30\n",
      "print A \n",
      "\n",
      "A = set([1,2,3,4])\n",
      "A.clear() #\uc6d0\uc18c\ub4e4 \uc5c6\uc560\uae30\n",
      "print A"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "set([4, 7])\n",
        "set([7])\n",
        "set([])\n"
       ]
      }
     ],
     "prompt_number": 41
    }
   ],
   "metadata": {}
  }
 ]
}