Day3파이썬최종.ipynb

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      "include_colab_link": true
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    "kernelspec": {
      "name": "python3",
      "display_name": "Python 3"
    },
    "language_info": {
      "name": "python"
    }
  },
  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "view-in-github",
        "colab_type": "text"
      },
      "source": [
        "<a href=\"https://colab.research.google.com/github/wnsmir/DSBA5/blob/main/Day3%ED%8C%8C%EC%9D%B4%EC%8D%AC%EC%B5%9C%EC%A2%85.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "id": "kFrKLnuYSrLW"
      },
      "outputs": [],
      "source": [
        "# 1. enumerate"
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "some_list=['foo','bar','baz']\n",
        "for v in some_list:\n",
        "  print(v)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "GXW7_KsjTRGY",
        "outputId": "00dcc15f-5b36-4cc2-b818-79db1c9652c8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "foo\n",
            "bar\n",
            "baz\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "some_list=['foo','bar','baz']\n",
        "mapping={} # null dict type\n",
        "for i,v in enumerate(some_list):\n",
        "  mapping[v]=i\n",
        "print(mapping)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "7dxSFDI0Tvoh",
        "outputId": "ddf96733-390b-48e2-a11f-b27479ffcb2a"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "{'foo': 0, 'bar': 1, 'baz': 2}\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# 2. zip\n",
        "seq1=['foo','bar','baz']\n",
        "seq2=['one','two','three']"
      ],
      "metadata": {
        "id": "wvZv4puIUPru"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "zip1=list(zip(seq1,seq2))"
      ],
      "metadata": {
        "id": "5ZKHRaykUorS"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "print(zip1)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "w_5tZ_EbVU_M",
        "outputId": "c1ad5a2f-6de9-4e5c-e405-44997ba05426"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "[('foo', 'one'), ('bar', 'two'), ('baz', 'three')]\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "zip1[2]"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "MDxM2n-QVXf7",
        "outputId": "daef614a-8ed3-4c8b-9f57-e98ce4436eee"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "('baz', 'three')"
            ]
          },
          "metadata": {},
          "execution_count": 33
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "seq1=['foo','bar','baz']\n",
        "seq2=['one','two','three']\n",
        "seq3=[False,True]\n",
        "list(zip(seq1,seq2,seq3)) # 가장 짧은 크기를 따른다."
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "oslGbALXWBy6",
        "outputId": "833962cf-4875-44c9-e1b6-d1b2c09bf4bf"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "[('foo', 'one', False), ('bar', 'two', True)]"
            ]
          },
          "metadata": {},
          "execution_count": 35
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# 3. map 함수\n",
        "def ftn1(x):\n",
        "  return x**2\n",
        "ftn1(100)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "IUXNtkGRW4ay",
        "outputId": "220c3e5e-152e-4016-85fb-ef1fe4242d50"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "10000"
            ]
          },
          "metadata": {},
          "execution_count": 36
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "numbers=[1,2,3,4,5]\n",
        "ftn1(numbers)"
      ],
      "metadata": {
        "collapsed": true,
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 277
        },
        "id": "gMkDmKjtXEIL",
        "outputId": "4ebf0cf2-e7cb-4f90-d0c4-d4890225a550"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "error",
          "ename": "TypeError",
          "evalue": "unsupported operand type(s) for ** or pow(): 'list' and 'int'",
          "traceback": [
            "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
            "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
            "\u001b[0;32m<ipython-input-43-09d3ebce3f01>\u001b[0m in \u001b[0;36m<cell line: 2>\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0mnumbers\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;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m \u001b[0mftn1\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mnumbers\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
            "\u001b[0;32m<ipython-input-36-66f76807894b>\u001b[0m in \u001b[0;36mftn1\u001b[0;34m(x)\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0;31m# 3. map 함수\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      2\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mftn1\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mx\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 3\u001b[0;31m   \u001b[0;32mreturn\u001b[0m \u001b[0mx\u001b[0m\u001b[0;34m**\u001b[0m\u001b[0;36m2\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      4\u001b[0m \u001b[0mftn1\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m100\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
            "\u001b[0;31mTypeError\u001b[0m: unsupported operand type(s) for ** or pow(): 'list' and 'int'"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "res=[]\n",
        "for v in numbers:\n",
        "  res.append(ftn1(v))\n",
        "print(res)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "QoNzQixwXLhN",
        "outputId": "66521ea8-0101-4aba-8942-3ba6c0d9b5f4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "[1, 4, 9, 16, 25]\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "res=list(map(ftn1,numbers))\n",
        "print(res)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "vU13Q7TVXWdw",
        "outputId": "3c60bab2-3a16-40f0-8bd2-069602c3b816"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "[1, 4, 9, 16, 25]\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "numbers1=[1,2,3]\n",
        "numbers2=[4,5,6]\n",
        "result=list(map(lambda x,y:x+y,numbers1,numbers2))\n",
        "print(result)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "pAwJ6VygYsFq",
        "outputId": "f1b21eaa-ab33-48a1-e1a2-23dd27c815e7"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "[5, 7, 9]\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## numpy\n",
        "import numpy as np\n",
        "np.array([1,2,3])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "k0RvR45SZGUr",
        "outputId": "37ab204b-a86f-4622-ef9c-bdd9862f86e8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1, 2, 3])"
            ]
          },
          "metadata": {},
          "execution_count": 45
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.zeros(5)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "_AslnkJFq1fu",
        "outputId": "f222094a-ffcf-4c81-fa71-3fb0d07d3d80"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([0., 0., 0., 0., 0.])"
            ]
          },
          "metadata": {},
          "execution_count": 46
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.zeros((2,3))"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "ZJrgy5gaq6bS",
        "outputId": "ed62b78e-e527-4c64-f37e-ace29c0beda0"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[0., 0., 0.],\n",
              "       [0., 0., 0.]])"
            ]
          },
          "metadata": {},
          "execution_count": 48
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.ones(5)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "hUrnTND-rLcs",
        "outputId": "23ac4906-9ed5-4898-8602-1941c60e3954"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1., 1., 1., 1., 1.])"
            ]
          },
          "metadata": {},
          "execution_count": 49
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.ones((2,3))"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "tE3wAB02rO_M",
        "outputId": "29e3d916-1b23-46c9-d804-fbe3cfbd9c45"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[1., 1., 1.],\n",
              "       [1., 1., 1.]])"
            ]
          },
          "metadata": {},
          "execution_count": 50
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([[1,2,3],[4,5,6]])\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "D8onRCWUrU9B",
        "outputId": "2745b133-859e-40b6-f2d3-580db234c5fd"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[1, 2, 3],\n",
              "       [4, 5, 6]])"
            ]
          },
          "metadata": {},
          "execution_count": 51
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.zeros_like(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "qsVK2Zdxrbj5",
        "outputId": "fae9115f-2ac2-4ad9-8ea6-14d9749a0162"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[0, 0, 0],\n",
              "       [0, 0, 0]])"
            ]
          },
          "metadata": {},
          "execution_count": 52
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.ones_like(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "4N36KN1xrhoI",
        "outputId": "974c716a-0f7f-4630-e150-4bd80d6bf9fc"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[1, 1, 1],\n",
              "       [1, 1, 1]])"
            ]
          },
          "metadata": {},
          "execution_count": 53
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "### identity matrix : 단위행렬\n",
        "np.eye(3,3)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "r9wbq5RYsEeM",
        "outputId": "32e79d43-890b-48b7-c5ee-7234dffc210e"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[1., 0., 0.],\n",
              "       [0., 1., 0.],\n",
              "       [0., 0., 1.]])"
            ]
          },
          "metadata": {},
          "execution_count": 54
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.identity(3)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "H1-aIp00sOtd",
        "outputId": "0a6d2715-2a07-4e82-cd42-2b1c215e88ba"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[1., 0., 0.],\n",
              "       [0., 1., 0.],\n",
              "       [0., 0., 1.]])"
            ]
          },
          "metadata": {},
          "execution_count": 55
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "### 연산\n",
        "np.sqrt(2)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "tqII0bS6sv87",
        "outputId": "85e0a2ef-2a55-4b32-e55a-030391be23c9"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "1.4142135623730951"
            ]
          },
          "metadata": {},
          "execution_count": 57
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "ar1=np.arange(10)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "NVJcBm5vs8lS",
        "outputId": "53aebd85-71b0-4346-9374-fea26d4224d1"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])"
            ]
          },
          "metadata": {},
          "execution_count": 58
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "ar2=np.random.randn(10)\n",
        "print(ar2)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "eqrMtB4YtELi",
        "outputId": "feae1e42-043c-4668-b107-78371976f585"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "[ 0.39126982 -1.38610223 -0.76420442  0.72470724 -1.70311816  1.84579358\n",
            " -0.53909797 -0.08875536  0.19116399  0.36632365]\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "### abs, sqrt, exp, log, log10, sign"
      ],
      "metadata": {
        "id": "Gjx6ZUketRKD"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "np.sign(ar2)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "saiLMGLktZHv",
        "outputId": "e3e95cfe-a540-40b5-9e50-ad8158a94775"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1., -1., -1.,  1., -1.,  1., -1., -1.,  1.,  1.])"
            ]
          },
          "metadata": {},
          "execution_count": 68
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.log(10)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Jrc0uO92tn5f",
        "outputId": "8e2225da-1085-44a1-fb61-2ac154e0ac88"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "2.302585092994046"
            ]
          },
          "metadata": {},
          "execution_count": 66
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.log10(10)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "-3amCeowtsEA",
        "outputId": "d06fc7f8-9711-42dc-f8da-e1591cbf5017"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "1.0"
            ]
          },
          "metadata": {},
          "execution_count": 67
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.sign(-3)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "1ThYMIQNt8p7",
        "outputId": "78d68390-2c17-42a1-c874-1913267bb888"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "-1"
            ]
          },
          "metadata": {},
          "execution_count": 71
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# np.ceil, np.floor, np.rint, np.int64"
      ],
      "metadata": {
        "id": "DrAE54zVvEuB"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([1.3,1.5])\n",
        "np.ceil(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "LjigbMdvvL3f",
        "outputId": "77d5ffbd-b7d9-49dd-f4c7-110a9cea6a26"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([2., 2.])"
            ]
          },
          "metadata": {},
          "execution_count": 75
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.floor(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "6XXlR7DUvea3",
        "outputId": "7956e23f-807c-4585-e8d3-ef8ec257a1cb"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1., 1.])"
            ]
          },
          "metadata": {},
          "execution_count": 76
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.rint(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "opGGoEb0vhVr",
        "outputId": "1545b393-da53-4a15-c4a9-783039bcedba"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1., 2.])"
            ]
          },
          "metadata": {},
          "execution_count": 77
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.int64(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "9_pta7JDvw_K",
        "outputId": "56c55056-3a48-4ca5-add7-6dd738b65516"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1, 1])"
            ]
          },
          "metadata": {},
          "execution_count": 78
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## np.isnan, np.isfinite, isinf\n",
        "a=np.array([1.0,np.nan,3.5,np.nan])\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Y0oDBkifwM0b",
        "outputId": "96a1cb8d-3905-4cc6-8efa-6b9d2f07d57e"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1. , nan, 3.5, nan])"
            ]
          },
          "metadata": {},
          "execution_count": 79
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.isnan(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "7fHmiaEKwmVg",
        "outputId": "a12cd03c-7881-4c51-87d5-e0bf1a6cf536"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([False,  True, False,  True])"
            ]
          },
          "metadata": {},
          "execution_count": 80
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([1.0,np.inf, 1.5,-np.inf])\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "et81ogIWw3L7",
        "outputId": "2bd36fa1-fd39-4eed-e1b0-84dc77533cac"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1. ,  inf,  1.5, -inf])"
            ]
          },
          "metadata": {},
          "execution_count": 82
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.isfinite(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "12EnNMuJxCF2",
        "outputId": "b4934f85-edf9-4578-cee8-06f3beb7632f"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ True, False,  True, False])"
            ]
          },
          "metadata": {},
          "execution_count": 83
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.isinf(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "KDWKSWcuxGIN",
        "outputId": "f0a30aa8-66ff-45ad-b296-493c447867e5"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([False,  True, False,  True])"
            ]
          },
          "metadata": {},
          "execution_count": 84
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "abs(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "uM6qk9HcxNK9",
        "outputId": "6e3e915b-df9b-4268-c2fe-d81f1adba5af"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1. , inf, 1.5, inf])"
            ]
          },
          "metadata": {},
          "execution_count": 85
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## any 함수\n",
        "a=np.array([True,False,True])\n",
        "np.any(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "iW6k--mGyUE_",
        "outputId": "37a8168f-6f48-499d-a19c-e00848bbdb96"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "True"
            ]
          },
          "metadata": {},
          "execution_count": 87
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([False,False,False])\n",
        "np.any(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "KbDZz_zsyi1t",
        "outputId": "dcc152d7-3b8b-408b-8b35-7c0ff04e7167"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 88
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## all 함수\n",
        "a=np.array([True,False,True])\n",
        "np.all(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Pgc-71GPysdl",
        "outputId": "df26e1ca-710b-49ba-b719-5a4c8e5bc08a"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "False"
            ]
          },
          "metadata": {},
          "execution_count": 89
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([True,True,True])\n",
        "np.all(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "gaeT4kEHywic",
        "outputId": "a21c33f1-42f0-42bf-881a-2b89c7e02dc1"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "True"
            ]
          },
          "metadata": {},
          "execution_count": 90
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "### axis=0, axis=1"
      ],
      "metadata": {
        "id": "mw0HJER5zWVr"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([[1,2,3],[4,5,6]])\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "zSqzyamWza3t",
        "outputId": "a380c978-51ae-4932-9984-489a33edd771"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[1, 2, 3],\n",
              "       [4, 5, 6]])"
            ]
          },
          "metadata": {},
          "execution_count": 91
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a.mean()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "q7gzMRjEziXi",
        "outputId": "c91f4d54-b77f-450b-e0ff-a7173578bd27"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "3.5"
            ]
          },
          "metadata": {},
          "execution_count": 92
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a.mean(axis=0)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "uFK60GtDzmYL",
        "outputId": "2971e2df-c697-4713-ae1f-97ce33737f05"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([2.5, 3.5, 4.5])"
            ]
          },
          "metadata": {},
          "execution_count": 93
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a.mean(axis=1)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "xI8IVS25zvu4",
        "outputId": "d802530e-0260-4b6f-d8ec-96f14d770bb3"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([2., 5.])"
            ]
          },
          "metadata": {},
          "execution_count": 94
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a.sum(axis=0)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "xNWYykJR0EpC",
        "outputId": "193e7ab4-25c5-4e9a-d89b-2e3d6f8f5fd3"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([5, 7, 9])"
            ]
          },
          "metadata": {},
          "execution_count": 95
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a.sum(axis=1)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "60xDoz3o0G2R",
        "outputId": "16bba703-1f40-4282-8382-7409650ef0f5"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 6, 15])"
            ]
          },
          "metadata": {},
          "execution_count": 97
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## cumsum\n",
        "print(a)\n",
        "a.cumsum(axis=0)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "KR_S-Ogf0LaE",
        "outputId": "16fa12ed-af67-448a-f7ab-ce560fb00b0e"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "[[1 2 3]\n",
            " [4 5 6]]\n"
          ]
        },
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[1, 2, 3],\n",
              "       [5, 7, 9]])"
            ]
          },
          "metadata": {},
          "execution_count": 100
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a.cumsum(axis=1)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "kAKaoZ8P4ZgJ",
        "outputId": "cc1a7e14-5d46-4c10-c263-87d93f6f6807"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 1,  3,  6],\n",
              "       [ 4,  9, 15]])"
            ]
          },
          "metadata": {},
          "execution_count": 101
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "### np.min, np.max, np.argmin, np.argmax"
      ],
      "metadata": {
        "id": "1hgtsYsi41ye"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([[10,20,30],[40,50,60]])\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "OfB1VUsA5OYT",
        "outputId": "be9dad79-615d-4a9d-dd21-ad593e52d070"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[10, 20, 30],\n",
              "       [40, 50, 60]])"
            ]
          },
          "metadata": {},
          "execution_count": 102
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.min(a,axis=0)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "hqz_Uhop5YQm",
        "outputId": "7c8e0ba6-9df6-4609-ab6c-db990f13e6d8"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([10, 20, 30])"
            ]
          },
          "metadata": {},
          "execution_count": 103
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.min(a,axis=1)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "U5z0gQp85dgc",
        "outputId": "9bd48b4c-b81d-423c-f6d7-48e2fb2e6c69"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([10, 40])"
            ]
          },
          "metadata": {},
          "execution_count": 105
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.argmin(a,axis=0)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "uSA_fYw65ksx",
        "outputId": "0cdfc878-6805-4ef0-d021-8986c3e27f56"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([0, 0, 0])"
            ]
          },
          "metadata": {},
          "execution_count": 107
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.argmin(a,axis=1)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "rgSAmb2b5usl",
        "outputId": "8697a655-7d6c-467c-8aa5-1e8ff060b4a3"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([0, 0])"
            ]
          },
          "metadata": {},
          "execution_count": 108
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.argmax(a,axis=0)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "PgRBhdVv6cjk",
        "outputId": "7cb6923a-f36b-46d8-9ac5-ebe68457f242"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1, 1, 1])"
            ]
          },
          "metadata": {},
          "execution_count": 110
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.argmax(a,axis=1)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "AKfvsLlE6f9R",
        "outputId": "0b354ca8-8282-4467-af32-c5cfe40ee9e6"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([2, 2])"
            ]
          },
          "metadata": {},
          "execution_count": 111
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "### np.where\n",
        "a=np.array([3,-3,5,0,-5])\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "MP7E38Xg7C7k",
        "outputId": "9a51f2da-08f6-4704-cf89-87d3cc9a6e70"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 3, -3,  5,  0, -5])"
            ]
          },
          "metadata": {},
          "execution_count": 112
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "b=np.where(a>0,a,0)\n",
        "b"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "ublUl3ZT7Ob0",
        "outputId": "59c1cbc9-dfbb-4e23-8a4d-ddea099d2a3e"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([3, 0, 5, 0, 0])"
            ]
          },
          "metadata": {},
          "execution_count": 113
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([[1,-2,3],[2,-4,5]])\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "gSo63hQq7aSp",
        "outputId": "222b8f76-6fab-44a8-eae4-0238eb54d65f"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 1, -2,  3],\n",
              "       [ 2, -4,  5]])"
            ]
          },
          "metadata": {},
          "execution_count": 114
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "b=np.where(a>0,a,0)\n",
        "b"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "1aQ9V1DH7grq",
        "outputId": "c825a68f-73f7-4607-9977-8bb935096833"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[1, 0, 3],\n",
              "       [2, 0, 5]])"
            ]
          },
          "metadata": {},
          "execution_count": 115
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([1,2,3,np.nan])\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "HfQk7sH48M-p",
        "outputId": "12ac7253-bf86-4912-c565-3db243f8323e"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1.,  2.,  3., nan])"
            ]
          },
          "metadata": {},
          "execution_count": 116
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.where(np.isnan(a),0,a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "yLefx7ZS8TDn",
        "outputId": "9fdba1c5-f143-4020-f3fc-fe6d8cfc0b12"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1., 2., 3., 0.])"
            ]
          },
          "metadata": {},
          "execution_count": 118
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "(np.isnan(a)).sum()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "YFAOeyVe882e",
        "outputId": "4f43501b-25cc-4817-be3a-56aa03d5685b"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "1"
            ]
          },
          "metadata": {},
          "execution_count": 119
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## 선형대수 : 행렬연산\n",
        "x=np.array([[1,2,3],[4,5,6]])\n",
        "y=np.array([[6,23],[-1,7],[8,9]])\n",
        "print(x)\n",
        "print(y)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "phkxYf659bTv",
        "outputId": "d1bf047d-3dd7-45bc-d0e6-76d6d0055166"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "[[1 2 3]\n",
            " [4 5 6]]\n",
            "[[ 6 23]\n",
            " [-1  7]\n",
            " [ 8  9]]\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## 행렬의 곱\n",
        "x.dot(y)  ## x y"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "hYFLzWJO-Da3",
        "outputId": "f12d6e49-57f1-4665-8b77-5956453a245e"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 28,  64],\n",
              "       [ 67, 181]])"
            ]
          },
          "metadata": {},
          "execution_count": 121
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.dot(x,y)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "QdsHAQRt-OW8",
        "outputId": "808e36dd-3a8d-4fa3-8c32-b88a0553dcdc"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 28,  64],\n",
              "       [ 67, 181]])"
            ]
          },
          "metadata": {},
          "execution_count": 122
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.sum(x,axis=1)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "ZWeRZJ0v-hg9",
        "outputId": "cea30fc3-40d1-4281-e606-5af608bfc83c"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 6, 15])"
            ]
          },
          "metadata": {},
          "execution_count": 124
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.dot(x,np.ones(3))"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "x4X6xYYH-rth",
        "outputId": "eefd1502-45d7-4331-be3d-28edaa2a4688"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 6., 15.])"
            ]
          },
          "metadata": {},
          "execution_count": 125
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## inv((yTy)-1)"
      ],
      "metadata": {
        "id": "oFDdFftd_Kph"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "from numpy.linalg import inv"
      ],
      "metadata": {
        "id": "tQ48LEuy_qta"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "np.linalg.inv(y.T.dot(y))"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "zciIqbm6_asM",
        "outputId": "49590d69-9ed0-42fb-af40-12a8c51847ab"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 0.02599606, -0.00800789],\n",
              "       [-0.00800789,  0.00398422]])"
            ]
          },
          "metadata": {},
          "execution_count": 128
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "inv(y.T.dot(y))"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "fhRky_17_8kR",
        "outputId": "837d2c8d-81b4-46b3-b786-1d4cd6e2a810"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 0.02599606, -0.00800789],\n",
              "       [-0.00800789,  0.00398422]])"
            ]
          },
          "metadata": {},
          "execution_count": 130
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "### numpy 에서 난수(random number) 생성"
      ],
      "metadata": {
        "id": "Ou850Hp6CApb"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "np.random.seed(12345)\n",
        "np.random.rand(10)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "2bD3BqwaCGho",
        "outputId": "9e9cdb5f-59b7-42fb-ed06-cc9f150ffe35"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([0.92961609, 0.31637555, 0.18391881, 0.20456028, 0.56772503,\n",
              "       0.5955447 , 0.96451452, 0.6531771 , 0.74890664, 0.65356987])"
            ]
          },
          "metadata": {},
          "execution_count": 135
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "np.random.seed(123)\n",
        "np.random.rand(5)\n",
        "\n",
        "### 여기까지 실습! 15시까지 휴식!"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "NHQ29H5CCqt3",
        "outputId": "bb8f0212-f4f1-4339-c950-3018ea55388c"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([0.69646919, 0.28613933, 0.22685145, 0.55131477, 0.71946897])"
            ]
          },
          "metadata": {},
          "execution_count": 137
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "import random\n",
        "a=[1,2,3,'aa',4,5]\n",
        "random.choice(a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "XwjGgruBGIAj",
        "outputId": "50cc9d59-1387-415b-ffff-95ea8ac82f30"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "4"
            ]
          },
          "metadata": {},
          "execution_count": 138
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "random.choices(a,k=3) # 복원추출 : sampling with replacement"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "VhIeSMQrGZgG",
        "outputId": "df866e56-82d5-43cb-9ea0-8f217ccc773b"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "[4, 5, 5]"
            ]
          },
          "metadata": {},
          "execution_count": 143
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "random.sample(a,k=5) # 비복원추출 : sampling without replacement"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "RyitrNmnG3BS",
        "outputId": "4cf1918f-10d0-47bd-e816-1594e4ed99ff"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "[5, 1, 4, 'aa', 3]"
            ]
          },
          "metadata": {},
          "execution_count": 145
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "x=[]\n",
        "for i in range(10):\n",
        "  b=random.random()\n",
        "  x.append(b)\n",
        "print(x)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "mtuCWbyEHBuy",
        "outputId": "10eabb70-f0a3-442a-9858-08d369453e99"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "[0.3891344948064014, 0.38639855720954985, 0.7365105299674716, 0.7335750725683714, 0.8768695015904435, 0.5212354949307234, 0.8499646995279089, 0.659868948166257, 0.7354292588962066, 0.3936531978491151]\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([1,2,3,4,5])\n",
        "np.random.choice(a,3,replace=True) # 복원추출 : sampling with replacement"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "aaZm91sYIFoj",
        "outputId": "355d5327-8efe-4222-a4ee-db3a5477bfa6"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1, 2, 2])"
            ]
          },
          "metadata": {},
          "execution_count": 152
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([1,2,3,4,5])\n",
        "np.random.choice(a,3,replace=False) # 비복원추출 : sampling without replacement"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "IvCZ-R7nIT3X",
        "outputId": "bd4dd542-0b94-45cf-822d-5ad75dbd8f89"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([4, 2, 5])"
            ]
          },
          "metadata": {},
          "execution_count": 153
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=[1,2,3,'aa',4,5]\n",
        "random.shuffle(a)\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "ybC8U4RbI1Oi",
        "outputId": "6a8362ee-f4b1-48b2-ea39-9f093b164a45"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "[5, 2, 4, 1, 3, 'aa']"
            ]
          },
          "metadata": {},
          "execution_count": 157
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a=np.array([1,2,3,4,5])\n",
        "np.random.shuffle(a)\n",
        "a"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "7DaLnHQHJOjx",
        "outputId": "440f482d-a109-488b-89b8-f7adb0e85cd9"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([1, 5, 3, 4, 2])"
            ]
          },
          "metadata": {},
          "execution_count": 158
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "#### 문자열 처리\n",
        "s='Python love!'"
      ],
      "metadata": {
        "id": "37-FVy1HKvt8"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "s[-1]"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "iFRMLc7yLK_X",
        "outputId": "9070e69b-61f3-4709-9faf-b0b9738ec271"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'!'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 161
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## split 함수 : 문자열 분리\n",
        "s='Welcome to Python'\n",
        "s.split()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "MWkyegbmLPAv",
        "outputId": "7421305f-980f-4641-f0b0-c13cf6920b3d"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['Welcome', 'to', 'Python']"
            ]
          },
          "metadata": {},
          "execution_count": 162
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='2021.8.15'\n",
        "s.split('.')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "cv2K9xDWLhG9",
        "outputId": "35f9d454-54b7-471c-9dda-9b64c5d1baf4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['2021', '8', '15']"
            ]
          },
          "metadata": {},
          "execution_count": 164
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='Hello, World!'\n",
        "res=s.split(',')"
      ],
      "metadata": {
        "id": "gteWuImtMCsg"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "s1=[]\n",
        "for x in res:\n",
        "  s1.append(x.strip())\n",
        "s1"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "prQ4TswyMThv",
        "outputId": "ee59d8b3-31f6-48eb-9601-8512a9e60407"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['Hello', 'World!']"
            ]
          },
          "metadata": {},
          "execution_count": 177
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "[x.strip() for x in s.split(',')]"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Rqb_uGKdM_2g",
        "outputId": "35adcee7-d0b2-404f-cfdb-99a4522fc475"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['Hello', 'World!']"
            ]
          },
          "metadata": {},
          "execution_count": 178
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## 문자열 이어붙이기"
      ],
      "metadata": {
        "id": "p6Zja2wMMphh"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "''.join(['apple','grape','banana'])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "niXbGIPyN40L",
        "outputId": "990aaedc-bb12-4c3f-b262-712465e06913"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'applegrapebanana'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 181
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "' '.join(['apple','grape','banana'])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "ZeuwHdsNOF01",
        "outputId": "a3569798-dcc9-4eb8-f7ba-7c9f3974d1d7"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'apple grape banana'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 182
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'.'.join(['apple','grape','banana'])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "0l8Ld8LAOH81",
        "outputId": "8d046fb4-d051-45a5-a2e8-8e1612bf0045"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'apple.grape.banana'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 183
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "'-'.join(['apple','grape','banana'])"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "3U_lL6pNOuyC",
        "outputId": "b9cd2248-2cd8-4bcc-b2c8-2a10fc3694e6"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'apple-grape-banana'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 185
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## replace\n",
        "'010.1234.5678'.replace('.','-')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "I3W8rErKOgyu",
        "outputId": "a48adc92-5116-4e12-fd65-fa1c427d452e"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'010-1234-5678'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 184
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='hello world'\n",
        "''.join(list(s))"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "9FfprIf-O3Po",
        "outputId": "75bc16f9-d1dc-4ec0-8460-361586c36d82"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hello world'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 192
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "list(s)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "kxE1ZluBP-1R",
        "outputId": "55652a6e-4f34-4d3c-b02e-98f2a5c1bfe4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd']"
            ]
          },
          "metadata": {},
          "execution_count": 195
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='Actions \\n\\t speak louder than words'\n",
        "print(s)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "rDxetvMbPYxp",
        "outputId": "5613f7a7-f908-419e-8f2c-22e23ba2bff1"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "Actions \n",
            "\t speak louder than words\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "' '.join(s.split())"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "FiT6OKkAPllS",
        "outputId": "5f024d7b-5e74-4122-8a5d-5e1759f23746"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'Actions speak louder than words'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 191
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='Hello, World!'\n",
        "s.lower()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "EXD97ujjQKUa",
        "outputId": "e27fec33-cc2e-4b5e-c3b0-ec46b34941ed"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hello, world!'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 196
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='Hello, World!'\n",
        "s.upper()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "2aqmBzCgTtba",
        "outputId": "ad70fb79-59ef-466c-d9f2-bb4345418665"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'HELLO, WORLD!'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 197
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='hello, world!'\n",
        "s.capitalize()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "IhHTL2g_TwFu",
        "outputId": "af6b6808-0d35-4ec1-8774-568f190198d2"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'Hello, world!'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 198
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='    hello, world     '\n",
        "s.strip()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "DRHsdmt-UBox",
        "outputId": "8a8a5979-4a44-43b0-f52f-ba6a289f6633"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hello, world'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 199
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s.lstrip()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "X0rt2tRrUI3L",
        "outputId": "659d5dbf-452a-4777-9751-3b4a44a215d2"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hello, world     '"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 200
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s.rstrip()"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "9e4_SBJwUMhI",
        "outputId": "23f5c0ab-507e-4920-90a0-4be90bc470af"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'    hello, world'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 201
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='############hellow, world####################'\n",
        "s.strip('#')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "WTYGpcYQUPTH",
        "outputId": "962c9302-6dd7-46d0-a4a4-71d00e0bce81"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hellow, world'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 202
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s.lstrip('#')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "CyxCi0gUUWQO",
        "outputId": "2ac24a1c-9dda-4941-a1a6-774425f55892"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'hellow, world####################'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 203
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s.rstrip('#')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "ZnRSvnYMUY1U",
        "outputId": "7a1da5e8-cb91-4131-ca1a-b32268184d68"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'############hellow, world'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 204
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s='www.book.sr.co.kr'\n",
        "s.find('.kr')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Ebw5IS2AU5pc",
        "outputId": "16466007-1665-46f5-d336-b7f6564e20ed"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "14"
            ]
          },
          "metadata": {},
          "execution_count": 205
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s.find('x')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Ob_BLTrIVEKi",
        "outputId": "8d2b9d18-53a4-4e85-c6fb-4ac93d640f80"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "-1"
            ]
          },
          "metadata": {},
          "execution_count": 206
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "s.count('.')"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Z-AYFnSjVIXo",
        "outputId": "9ec665b0-92ee-49b7-bc51-e8d66697e87f"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "4"
            ]
          },
          "metadata": {},
          "execution_count": 207
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "## 정규표현식 (regular expression)\n",
        "## 메타문자"
      ],
      "metadata": {
        "id": "rcxc35TtVmeV"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "markdown",
      "source": [
        "*   ^ : 문자열의 시작을 의미\n",
        "*   $ : 문자열의 끝을 의미\n",
        "*   . : 모든 문자를 의미\n",
        "*   \\d : 숫자를 의미\n",
        "*   \\w : 숫자+영문자+한글문자를 의미\n",
        "*   \\s : 공백문자 (스페이스, 탭, 줄바꿈)\n",
        "*   \\S : 공백제외 모든 문자\n",
        "*  '*'  : 앞 문자가 0번 이상 반복\n",
        "*  '+' : 앞 문자가 1번이상 반복\n",
        "*   ?  : 앞에 있는 문자열이 없거나, 1개 {0,1}임을 의미\n",
        "*  [abc] : a,b,c, 가운데 하나의 문자\n",
        "*  [^abc] : a,b,c, 가 아닌 어떤 자\n",
        "*  {m,n} : m에서 n까지 반복\n",
        "*  | : or 연산자"
      ],
      "metadata": {
        "id": "mRUAInKmV6F3"
      }
    },
    {
      "cell_type": "code",
      "source": [
        "import re\n",
        "text='foo bar\\t baz \\tqux'\n",
        "regex=re.compile('\\S.')\n",
        "regex.findall(text)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "2PJ1rZJKWl8C",
        "outputId": "cf741cf4-bd43-440c-f666-ccd0b5b9a0b4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['fo', 'o ', 'ba', 'r\\t', 'ba', 'z ', 'qu']"
            ]
          },
          "metadata": {},
          "execution_count": 229
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "import re\n",
        "text='CAABBB'\n",
        "regex=re.compile('AB*')\n",
        "regex.findall(text)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "K-gda0eWZD2D",
        "outputId": "7712ebbe-59ca-4079-c5cb-bf580b923f56"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['A', 'ABBB']"
            ]
          },
          "metadata": {},
          "execution_count": 230
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "import re\n",
        "text='CA AB BB'\n",
        "regex=re.compile('ab+',re.I)\n",
        "regex.findall(text)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "y_msy-3yZPVs",
        "outputId": "4d1fb341-071f-4220-fb1c-bdd64804860a"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['AB']"
            ]
          },
          "metadata": {},
          "execution_count": 234
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "import re\n",
        "text='CB ABBB BB'\n",
        "regex=re.compile('[CA].')\n",
        "regex.findall(text)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "4c01laXQZ8Ry",
        "outputId": "cff099c6-2515-43e9-c222-81d49012ed9c"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['CB', 'AB']"
            ]
          },
          "metadata": {},
          "execution_count": 236
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "import re\n",
        "text='CB ABBB BB'\n",
        "regex=re.compile('B{1,3}.')\n",
        "regex.findall(text)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "cDyAz22ybZQc",
        "outputId": "b6a45067-0ca6-483a-8099-1b4c759ae1b4"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['B ', 'BBB ', 'BB']"
            ]
          },
          "metadata": {},
          "execution_count": 238
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "import re\n",
        "text='오늘은 7월9일이고, 내 전화번호는 010-1234-5678입니다.'\n",
        "regex=re.compile('010-[0-9]{3,4}-[0-9]{4}')\n",
        "regex.findall(text)\n",
        "re.sub(regex, '***-****-****',text)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 35
        },
        "id": "rGmSDhBpaTE5",
        "outputId": "15eb3ee7-8cba-44f9-c593-eebee38810ef"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'오늘은 7월9일이고, 내 전화번호는 ***-****-****입니다.'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 250
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "import re\n",
        "text='abc@facebook.com와 bbc@google.com에서 이메일이 도착했습니다.'\n",
        "regex=re.compile('\\S+@[a-z.]+')\n",
        "print(regex.findall(text))\n",
        "re.sub(regex, '***@***',text)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 54
        },
        "id": "SuhWP0kAaqsM",
        "outputId": "714510c8-98c9-4db3-a267-7b8597a3bd65"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "['abc@facebook.com', 'bbc@google.com']\n"
          ]
        },
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'***@***와 ***@***에서 이메일이 도착했습니다.'"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 253
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "import re\n",
        "text='Good morning! RT @PythonUser I like Python #Python'\n",
        "regex=re.compile('RT|@\\S+|#\\S+')\n",
        "print(regex.findall(text))\n",
        "text1=re.sub(regex,'',text)\n",
        "print(text1)\n",
        "text2=re.sub(\"\\s+\",\" \",text1)\n",
        "print(text2)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "sNPdaB42iqP9",
        "outputId": "d208aa8f-f31b-40fe-a370-09ea80cabb6d"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "['RT', '@PythonUser', '#Python']\n",
            "Good morning!   I like Python \n",
            "Good morning! I like Python \n"
          ]
        }
      ]
    }
  ]
}