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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "***\n",
      "# 15. \ud30c\uc774\uc36c \ud568\uc218\n",
      "***\n",
      "***"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "## 1 \ud568\uc218\uc758 \uc815\uc758\uc640 \ud638\ucd9c\n",
      "***\n",
      "- \ud568\uc218: \uc5ec\ub7ec \uac1c\uc758 Statement\ub4e4\uc744 \ud558\ub098\ub85c \ubb36\uc740 \ub2e8\uc704\n",
      "- \ud568\uc218 \uc0ac\uc6a9\uc758 \uc7a5\uc810\n",
      "  - \ubc18\ubcf5\uc801\uc778 \uc218\ud589\uc774 \uac00\ub2a5\ud558\ub2e4\n",
      "  - \ucf54\ub4dc\ub97c \ub17c\ub9ac\uc801\uc73c\ub85c \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc744 \uc900\ub2e4\n",
      "  - \ucf54\ub4dc\uc758 \uc77c\uc815 \ubd80\ubd84\uc744 \ubcc4\ub3c4\uc758 \ub17c\ub9ac\uc801 \uac1c\ub150\uc73c\ub85c \ub3c5\ub9bd\ud654\ud560 \uc218 \uc788\uc74c\n",
      "    - \uc218\ud559\uc5d0\uc11c \ubcf5\uc7a1\ud55c \uac1c\ub150\uc744 \ud558\ub098\uc758 \ub2e8\uc21c\ud55c \uae30\ud638\ub85c \ub300\uce58\ud558\ub294 \uac83\uacfc \ube44\uc2b7"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 1-1 \uac04\ub2e8\ud55c \ud568\uc218\uc758 \uc815\uc758\n",
      "-  \ud568\uc218 \uc815\uc758\uc2dc \uc0ac\uc6a9\ud558\ub294 \ud0a4\uc6cc\ub4dc: def"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def add(a, b):\n",
      "    return a+b\n",
      "\n",
      "print add(1, 2)\n",
      "print\n",
      "\n",
      "def myabs(x):\n",
      "    if x < 0 : \n",
      "        x = -x\n",
      "    return x\n",
      "\n",
      "print abs(-4)\n",
      "print myabs(-4)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "3\n",
        "\n",
        "4\n",
        "4\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 1-2 \ud568\uc218 \uac1d\uccb4\uc640 \ud568\uc218 \ud638\ucd9c\n",
      "- \ud568\uc218\uc758 \uc774\ub984 \uc790\uccb4\ub294 \ud568\uc218 \uac1d\uccb4\uc758 \ub808\ud37c\ub7f0\uc2a4(Reference)\ub97c \uc9c0\ub2c8\uace0 \uc788\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def add(a, b):\n",
      "    return a + b\n",
      "\n",
      "print add"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "<function add at 0x10d9ad6e0>\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "c = add(10, 30)\n",
      "print c"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "40\n"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc774\ub984\uc5d0 \uc800\uc7a5\ub41c \ub808\ud37c\ub7f0\uc2a4\ub97c \ub2e4\ub978 \ubcc0\uc218\uc5d0 \ud560\ub2f9\ud558\uc5ec \uadf8 \ubcc0\uc218\ub97c \uc774\uc6a9\ud55c \ud568\uc218 \ud638\ucd9c \uac00\ub2a5 "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "f = add\n",
      "print f(4, 5)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "9\n"
       ]
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print f\n",
      "\n",
      "print f is add"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "<function add at 0x10b5ad758>\n",
        "True\n"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218\uc758 \ubab8\uccb4\uc5d0\ub294 \ucd5c\uc18c\ud55c \ud55c\uac1c \uc774\uc0c1\uc758 statement\uac00 \uc874\uc7ac\ud574\uc57c \ud568\n",
      "  - \uc544\ubb34\ub7f0 \ub0b4\uc6a9\uc774 \uc5c6\ub294 \ubab8\uccb4\ub97c \uc9c0\ub2cc \ud568\uc218\ub97c \ub9cc\ub4e4 \ub54c\uc5d0\ub294 pass \ub77c\ub294 \ud0a4\uc6cc\ub4dc\ub97c \ubab8\uccb4\uc5d0 \uc801\uc5b4\uc8fc\uc5b4\uc57c \ud568"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def simpleFunction():\n",
      "    pass\n",
      "\n",
      "simpleFunction()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 8
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc0ac\uc6a9 \uc608"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def addmember(members, newmember):\n",
      "    if newmember not in members:   # \uae30\uc874 \uba64\ubc84\uac00 \uc544\ub2c8\uba74\n",
      "        members.append(newmember)  # \ucd94\uac00\n",
      "\n",
      "members = ['hwang', 'lee', 'park', 'youn']  # \ub9ac\uc2a4\ud2b8\uc5d0 \ucd08\uae30 \uba64\ubc84 \uc124\uc815\n",
      "\n",
      "addmember(members, 'jo')  # \uc0c8\ub85c\uc6b4 \uba64\ubc84 \ucd94\uac00\n",
      "\n",
      "addmember(members, 'hwang') # (\uc774\ubbf8 \uc874\uc7ac\ud558\ub294) \uc0c8\ub85c\uc6b4 \uba64\ubc84 \ucd94\uac00\n",
      "\n",
      "print members"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "['hwang', 'lee', 'park', 'youn', 'jo']\n"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 1-3 \ud568\uc218 \uc778\uc218\uac12 \uc804\ub2ec\ubc29\ubc95\n",
      "- \ud30c\uc774\uc36c\uc5d0\uc11c\uc758 \uc778\uc218\uac12 \uc804\ub2ec \ubc29\ubc95\n",
      "  - \uae30\ubcf8\uc801\uc73c\ub85c \uac12\uc5d0 \uc758\ud55c \ud638\ucd9c(Call-by-Value)\n",
      "  - \ud558\uc9c0\ub9cc \ubcc0\uc218\uc5d0 \uc800\uc7a5\ub41c \uac12\uc774 \ucc38\uc870\uac12(Reference)\uc774\ubbc0\ub85c \uc2e4\uc81c\ub85c\ub294 \ucc38\uc870\uc5d0 \uc758\ud55c \ud638\ucd9c(Call-by-Reference)\ub85c \uc2e4\ud589\ub428"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc778\uc790\uc5d0 \ubcc0\uacbd\ubd88\uac00\ub2a5(Immutable) \uac1d\uccb4\uc778 \uc22b\uc790\uac12\uc744 \uc804\ub2ec\n",
      "  - \ud568\uc218 \ub0b4\uc5d0\uc11c \ub2e4\ub978 \uc22b\uc790\uac12\uc73c\ub85c \uce58\ud658 --> \uc758\ubbf8 \uc5c6\ub294 \uc778\uc790 \uc804\ub2ec"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def f1(b):\n",
      "    b = 100\n",
      "\n",
      "a = 200\n",
      "f1(a)\n",
      "print a"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "200\n"
       ]
      }
     ],
     "prompt_number": 23
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "![image](images/function_arg_int.png)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc778\uc790\uc5d0 \ubcc0\uacbd\ubd88\uac00\ub2a5(Immutable) \uac1d\uccb4\uc778 \ubb38\uc790\uc5f4\uc744 \uc804\ub2ec\n",
      "  - \ud568\uc218 \ub0b4\uc5d0\uc11c \ub2e4\ub978 \ubb38\uc790\uc5f4\ub85c \uce58\ud658 --> \uc758\ubbf8 \uc5c6\ub294 \uc778\uc790 \uc804\ub2ec"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def f2(b):\n",
      "    b = \"abc\"\n",
      "\n",
      "a = \"def\"\n",
      "f2(a)\n",
      "print a"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "def\n"
       ]
      }
     ],
     "prompt_number": 26
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "![image](images/function_arg_str.png)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc778\uc790\uc5d0 \ubcc0\uacbd\ubd88\uac00\ub2a5(Immutable) \uac1d\uccb4\uc778 \ud29c\ud50c\uc744 \uc804\ub2ec\n",
      "  - \ud568\uc218 \ub0b4\uc5d0\uc11c \ub2e4\ub978 \ud29c\ud50c\ub85c \uce58\ud658 --> \uc758\ubbf8 \uc5c6\ub294 \uc778\uc790 \uc804\ub2ec"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def f3(b):\n",
      "    b = (1,2,3)\n",
      "\n",
      "a = (4,5,6)\n",
      "f3(a)\n",
      "print a"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "(4, 5, 6)\n"
       ]
      }
     ],
     "prompt_number": 27
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "![image](images/function_arg_tuple.png)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc778\uc790\uc5d0 \ubcc0\uacbd\uac00\ub2a5\ud55c(Mutable)\ud55c \uac1d\uccb4\uc778 \ub9ac\uc2a4\ud2b8 \uc804\ub2ec \ubc0f \ub0b4\uc6a9 \uc218\uc815\n",
      "  - \uc804\ud615\uc801\uc778 \ud568\uc218 \uc778\uc790 \uc804\ub2ec\ubc95 \ubc0f \ud65c\uc6a9\ubc95"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def f4(b):\n",
      "    b[1] = 10\n",
      "\n",
      "a = [4,5,6]\n",
      "f4(a)\n",
      "print a"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "[4, 10, 6]\n"
       ]
      }
     ],
     "prompt_number": 30
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "![image](images/function_arg_list.png)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc778\uc790\uc5d0 \ubcc0\uacbd\uac00\ub2a5\ud55c(Mutable)\ud55c \uac1d\uccb4\uc778 \uc0ac\uc804 \uc804\ub2ec \ubc0f \ub0b4\uc6a9 \uc218\uc815\n",
      "  - \uc804\ud615\uc801\uc778 \ud568\uc218 \uc778\uc790 \uc804\ub2ec\ubc95 \ubc0f \ud65c\uc6a9\ubc95"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def f5(b):\n",
      "    b['a'] = 10\n",
      "\n",
      "a = {\"a\":1, \"b\":2}\n",
      "f5(a)\n",
      "print a"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "{'a': 10, 'b': 2}\n"
       ]
      }
     ],
     "prompt_number": 33
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "![image](images/function_arg_dict.png)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 1-4 \ubc18\ud658(return)\ubb38"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc778\uc218 \uc5c6\uc774 return \ubb38\uc744 \uc0ac\uc6a9\ud558\uba74 \uc2e4\uc81c\ub85c\ub294 None \uac1d\uccb4\uac00 \uc804\ub2ec\ub41c\ub2e4.\n",
      "  - None \uac1d\uccb4: \ud30c\uc774\uc36c \ub0b4\uc7a5 \uac1d\uccb4\ub85c\uc11c \uc544\ubb34 \uac12\ub3c4 \uc5c6\uc74c\uc744 \ub098\ud0c0\ub0b4\uae30 \uc704\ud55c \uac1d\uccb4"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def nothing():\n",
      "    return\n",
      "\n",
      "print nothing()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "None\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- return\ubb38 \uc5c6\uc774 \ub9ac\ud134\ud558\uae30"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def print_menu():\n",
      "    print '1. Snack'\n",
      "    print '2. Snake'\n",
      "    print '3. Snick'\n",
      "    \n",
      "print_menu()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1. Snack\n",
        "2. Snake\n",
        "3. Snick\n"
       ]
      }
     ],
     "prompt_number": 38
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- return\ubb38 \uc5c6\ub294 \ud568\uc218\ub77c\uace0 \ud560 \uc9c0\ub77c\ub3c4 \uc2e4\uc81c\ub85c\ub294 None \uac1d\uccb4\uac00 \uc804\ub2ec\ub428"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a = print_menu()\n",
      "\n",
      "print a"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1. Snack\n",
        "2. Snake\n",
        "3. Snick\n",
        "None\n"
       ]
      }
     ],
     "prompt_number": 50
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud55c \uac1c\uc758 \uac12\uc744 \ub9ac\ud134\ud560 \ub54c"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def abs(x):\n",
      "    if x < 0 : return -x\n",
      "    return x\n",
      "\n",
      "print abs(-10)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "10\n"
       ]
      }
     ],
     "prompt_number": 40
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ub450 \uac1c \uc774\uc0c1\uc758 \uac12\uc744 \ub9ac\ud134\ud560 \ub54c"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def swap(x, y):\n",
      "    return y, x   # \ud29c\ud50c\ub85c \ub9ac\ud134\ub41c\ub2e4.\n",
      "\n",
      "a = 10\n",
      "b = 20\n",
      "print a, b\n",
      "print \n",
      "\n",
      "a, b = swap(a, b) # \uacb0\uacfc\uc801\uc73c\ub85c a, b = b, a\uc640 \ub3d9\uc77c\n",
      "print a, b\n",
      "print\n",
      "\n",
      "a = 10\n",
      "b = 20\n",
      "x = swap(a, b)\n",
      "print x[0], x[1]  # \ud558\ub098\uc758 \uc774\ub984\uc73c\ub85c \ud29c\ud50c\uc744 \ubc1b\uc544\uc11c \ucc98\ub9ac\ud560 \uc218 \ub3c4\uc788\ub2e4."
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "10 20\n",
        "\n",
        "20 10\n",
        "\n",
        "20 10\n"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uc0c8\ub85c\uc6b4 \ub9ac\uc2a4\ud2b8\ub97c \ub9ac\ud134\ud558\ub294 \ud568\uc218 \uc608\n",
      "  - \ubb38\uc790\uc5f4 \ub9ac\uc2a4\ud2b8\ub97c \ubc1b\uc544\uc11c \uac01 \ubb38\uc790\uc5f4\uc758 \uae38\uc774 \uc815\ubcf4\ub97c \uc9c0\ub2cc \ub9ac\uc2a4\ud2b8\ub97c \ub9ac\ud134 "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def length_list(l):\n",
      "    res = []\n",
      "    for el in l:\n",
      "        res.append(len(el))\n",
      "    return res\n",
      "\n",
      "l = ['python', 'pyson', 'pythong', 'pydon']\n",
      "print length_list(l)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "[6, 5, 7, 5]\n"
       ]
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "l = ['python', 'pyson', 'pythong', 'pydon']\n",
      "print [len(s) for s in l]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "[6, 5, 7, 5]\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 1-5 \ud568\uc218 \uc778\uc790\uc5d0 \ub300\ud55c \ub3d9\uc801\uc778 \uc790\ub8cc\ud615 \uacb0\uc815\n",
      "- \ud30c\uc774\uc36c\uc5d0\uc11c\ub294 \ubaa8\ub4e0 \uac1d\uccb4\ub294 \ub3d9\uc801\uc73c\ub85c (\uc2e4\ud589\uc2dc\uac04\uc5d0) \uadf8 \ud0c0\uc785\uc774 \uacb0\uc815\ub41c\ub2e4.\n",
      "- \uadf8\ub7ec\ubbc0\ub85c, \ud568\uc218 \uc778\uc790\ub294 \ud568\uc218\uac00 \ud638\ucd9c\ub418\ub294 \uc21c\uac04 \ud574\ub2f9 \uc778\uc790\uc5d0 \uc804\ub2ec\ub418\ub294 \uac1d\uccb4\uc5d0 \ub530\ub77c \uadf8 \ud0c0\uc785\uc774 \uacb0\uc815\ub41c\ub2e4.\n",
      "  - \ud568\uc218 \ubab8\uccb4 \ub0b4\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \uc5ec\ub7ec\uac00\uc9c0 \uc5f0\uc0b0\uc790\ub4e4\uc740 \ud568\uc218 \ud638\ucd9c\uc2dc\uc5d0 \uacb0\uc815\ub41c \uac1d\uccb4 \ud0c0\uc785\uc5d0 \ub9de\uac8c \uc2e4\ud589\ub41c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def add(a, b):\n",
      "    return a + b\n",
      "\n",
      "c = add(1, 3.4)\n",
      "d = add('dynamic', 'typing')\n",
      "e = add(['list'], ['and', 'list'])\n",
      "print c\n",
      "print d\n",
      "print e"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "4.4\n",
        "dynamictyping\n",
        "['list', 'and', 'list']\n"
       ]
      }
     ],
     "prompt_number": 49
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "***\n",
      "## 2 \ud568\uc218 \uc778\uc218 \ucc98\ub9ac\n",
      "***"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 2-1 \uae30\ubcf8 \uc778\uc218 \uac12\n",
      "- \uae30\ubcf8 \uc778\uc218 \uac12\n",
      "  - \ud568\uc218\ub97c \ud638\ucd9c\ud560 \ub54c \uc778\uc218\ub97c \ub118\uaca8\uc8fc\uc9c0 \uc54a\uc544\ub3c4 \uc778\uc218\uac00 \uae30\ubcf8\uc801\uc73c\ub85c \uac00\uc9c0\ub294 \uac12"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def incr(a, step=1):\n",
      "    return a + step\n",
      "\n",
      "b = 1\n",
      "b = incr(b)     # 1 \uc99d\uac00\n",
      "print b\n",
      "\n",
      "b = incr(b, 10) # 10 \uc99d\uac00\n",
      "print b"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "2\n",
        "12\n"
       ]
      }
     ],
     "prompt_number": 81
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [\uc8fc\uc758] \ud568\uc218 \uc815\uc758\ub97c \ud560 \ub54c \uae30\ubcf8 \uac12\uc744 \uc9c0\ub2cc \uc778\uc218 \ub4a4\uc5d0 \uc77c\ubc18\uc801\uc778 \uc778\uc218\uac00 \uc62c \uc218 \uc5c6\uc74c"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def incr(step=1, a):\n",
      "    return a + step"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "SyntaxError",
       "evalue": "non-default argument follows default argument (<ipython-input-82-67693752f310>, line 1)",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-82-67693752f310>\"\u001b[0;36m, line \u001b[0;32m1\u001b[0m\n\u001b[0;31m    def incr(step=1, a):\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m non-default argument follows default argument\n"
       ]
      }
     ],
     "prompt_number": 82
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \uc815\uc758 \uc2dc\uc5d0 \uc5ec\ub7ec \uac1c\uc758 \uae30\ubcf8 \uc778\uc218 \uac12 \uc815\uc758 \uac00\ub2a5"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def incr(a, step=1, step2=10):\n",
      "    return a + step + step2\n",
      "\n",
      "print incr(10)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "21\n"
       ]
      }
     ],
     "prompt_number": 83
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 2-2 \ud0a4\uc6cc\ub4dc \uc778\uc218\n",
      "- \ud0a4\uc6cc\ub4dc \uc778\uc218\n",
      "  - \uc778\uc218 \uac12 \uc804\ub2ec \uc2dc\uc5d0 \uc778\uc218 \uc774\ub984\uacfc \ud568\uaed8 \uac12\uc744 \uc804\ub2ec\ud558\ub294 \ubc29\uc2dd\uc744 \uc77c\uceeb\ub294\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def area(height, width):\n",
      "    return height * width\n",
      "\n",
      "#\uc21c\uc11c\uac00 \uc544\ub2cc \uc774\ub984\uc73c\ub85c \uac12\uc774 \uc804\ub2ec\n",
      "a = area(height='height string ', width=3)\n",
      "print a\n",
      "\n",
      "b = area(width=20, height=10)\n",
      "print b"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "height string height string height string \n",
        "200\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218\ub97c \ud638\ucd9c \ud560 \ub54c\uc5d0 \ud0a4\uc6cc\ub4dc \uc778\uc218\ub294 \ub9c8\uc9c0\ub9c9\uc5d0 \ub193\uc5ec\uc838\uc57c \ud55c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print area(20, width=5)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "100\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [\uc8fc\uc758] \ud568\uc218 \ud638\ucd9c\uc2dc\uc5d0 \ud0a4\uc6cc\ub4dc \uc778\uc218 \ub4a4\uc5d0 \uc77c\ubc18 \uc778\uc218 \uac12\uc774 \uc62c \uc218 \uc5c6\ub2e4. "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "area(width=5, 20)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "SyntaxError",
       "evalue": "non-keyword arg after keyword arg (<ipython-input-80-32b5ca4bbf7f>, line 1)",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-80-32b5ca4bbf7f>\"\u001b[0;36m, line \u001b[0;32m1\u001b[0m\n\u001b[0;31m    area(width=5, 20)\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m non-keyword arg after keyword arg\n"
       ]
      }
     ],
     "prompt_number": 80
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \uae30\ubcf8 \uc778\uc218\uac12 \ubc0f \ud0a4\uc6cc\ub4dc \uc778\uc218\uc758 \ud63c\uc6a9"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def incr(a, step=1, step2=10, step3=100):\n",
      "    return a + step + step2 + step3\n",
      "\n",
      "print incr(10, 2, step2=100)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "212\n"
       ]
      }
     ],
     "prompt_number": 88
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \ud638\ucd9c \uc2dc\uc5d0 \ud0a4\uc6cc\ub4dc \uc778\uc218 \ub4a4\uc5d0 \uc77c\ubc18 \uc778\uc218 \uac12\uc774 \uc624\uba74 \uc5d0\ub7ec "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def incr(a, step=1, step2=10, step3=100):\n",
      "    return a + step + step2 + step3\n",
      "\n",
      "print incr(10, 2, step2=100, 200)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "SyntaxError",
       "evalue": "non-keyword arg after keyword arg (<ipython-input-89-3dbdc3e84e66>, line 4)",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-89-3dbdc3e84e66>\"\u001b[0;36m, line \u001b[0;32m4\u001b[0m\n\u001b[0;31m    print incr(10, 2, step2=100, 200)\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m non-keyword arg after keyword arg\n"
       ]
      }
     ],
     "prompt_number": 89
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def incr(a, step=1, step2=10, step3=100):\n",
      "    return a + step + step2 + step3\n",
      "\n",
      "print incr(10, 2, step2=100, step3=200)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "312\n"
       ]
      }
     ],
     "prompt_number": 90
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 2-3 \uac00\ubcc0 \uc778\uc218 \ub9ac\uc2a4\ud2b8\n",
      "- \ud568\uc218 \uc815\uc758\uc2dc\uc5d0 \uc77c\ubc18\uc801\uc778 \uc778\uc218 \uc120\uc5b8 \ub4a4\uc5d0 *var \ud615\uc2dd\uc758 \uc778\uc218\ub85c \uac00\ubcc0 \uc778\uc218\ub97c \uc120\uc5b8\ud560 \uc218 \uc788\uc74c\n",
      "  - var\uc5d0\ub294 \ud568\uc218 \ud638\ucd9c\uc2dc \ub123\uc5b4\uc8fc\ub294 \uc778\uc218 \uac12\ub4e4 \uc911 \uc77c\ubc18 \uc778\uc218\uc5d0 \ud560\ub2f9\ub418\ub294 \uac12\uc744 \uc81c\uc678\ud55c \ub098\uba38\uc9c0 \uac12\ub4e4\uc744 \uc9c0\ub2cc \ud29c\ud50c \uac1d\uccb4\uac00 \ud560\ub2f9\ub41c\ub2e4."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def varg(a, *arg):\n",
      "    print a, arg\n",
      "\n",
      "varg(1)\n",
      "varg(2,3)\n",
      "varg(2,3,4,5,6)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1 ()\n",
        "2 (3,)\n",
        "2 (3, 4, 5, 6)\n"
       ]
      }
     ],
     "prompt_number": 91
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- C\uc5b8\uc5b4\uc758 printf\ubb38\uacfc \uc720\uc0ac\ud55c \ud615\ud0dc\uc758 printf \uc815\uc758 \ubc29\ubc95"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def printf(format, *args):\n",
      "    print format % args\n",
      "\n",
      "printf(\"I've spent %d days and %d night to do this\", 6, 5)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "I've spent 6 days and 5 night to do this\n"
       ]
      }
     ],
     "prompt_number": 84
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### 2-5 \ud29c\ud50c \uc778\uc218\uc640 \uc0ac\uc804 \uc778\uc218\ub85c \ud568\uc218 \ud638\ucd9c\ud558\uae30\n",
      "- \ud568\uc218 \ud638\ucd9c\uc5d0 \uc0ac\uc6a9\ub420 \uc778\uc218\uac12\ub4e4\uc774 \ud29c\ud50c\uc5d0 \uc788\ub2e4\uba74 \"*\ud29c\ud50c\ubcc0\uc218\"\ub97c \uc774\uc6a9\ud558\uc5ec \ud568\uc218 \ud638\ucd9c\uc774 \uac00\ub2a5"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def h(a, b, c):\n",
      "    print a,b,c\n",
      "    \n",
      "args = (1, 2, 3)\n",
      "h(*args)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1 2 3\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- \ud568\uc218 \ud638\ucd9c\uc5d0 \uc0ac\uc6a9\ub420 \uc778\uc218\uac12\ub4e4\uc774 \uc0ac\uc804\uc5d0 \uc788\ub2e4\uba74 \"*\uc0ac\uc804\ubcc0\uc218\"\ub97c \uc774\uc6a9\ud558\uc5ec \ud568\uc218 \ud638\ucd9c\uc774 \uac00\ub2a5"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "dargs = {'a':1, 'b':2, 'c':3}\n",
      "h(**dargs)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1 2 3\n"
       ]
      }
     ],
     "prompt_number": 88
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "<p style='text-align: right;'>\ucc38\uace0 \ubb38\ud5cc: \ud30c\uc774\uc36c(\uc5f4\ud608\uac15\uc758)(\uac1c\uc815\ud310 VER.2), \uc774\uac15\uc131, FreeLec, 2005\ub144 8\uc6d4 29\uc77c</p>"
     ]
    }
   ],
   "metadata": {}
  }
 ]
}