26_Nov.ipynb

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    "kernelspec": {
      "name": "python3",
      "display_name": "Python 3"
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    "language_info": {
      "name": "python"
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  "cells": [
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      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "id": "Tr6mhCo_rcwi"
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      "outputs": [],
      "source": [
        "import re\n"
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a = 'This is Hello my name is Python and Machine the learning 45and this python thi is simple'\n",
        "re.findall('python|simple|and', a)  # either"
      ],
      "metadata": {
        "colab": {
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        "id": "YJOvlsP3rdis",
        "outputId": "16221938-3d12-4e4b-919f-95835683b5ad"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['and', 'and', 'python', 'simple']"
            ]
          },
          "metadata": {},
          "execution_count": 45
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "re.findall('thi+', a) # match one or more occurances ( one match should be there)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "QQq9Dh-5rdmM",
        "outputId": "efd14a59-f7b8-4379-c3a2-3565ef209214"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['thi', 'thi']"
            ]
          },
          "metadata": {},
          "execution_count": 38
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "txt = \"hello planet\"\n",
        "\n",
        "#Search for a sequence that starts with \"he\", followed by 1 or more  (any) characters, and an \"o\":\n",
        "\n",
        "x = re.findall(\"p.+t\", txt)\n",
        "\n",
        "print(x)\n",
        "\n"
      ],
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        "id": "mFjwYlPX0t_S",
        "outputId": "6fd0e31c-90f1-4831-840f-2b77a2dd946b"
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      "execution_count": null,
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "['planet']\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [],
      "metadata": {
        "id": "hIWGMWaL0uDU"
      },
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "source": [
        "re.findall('thi*', a) # match zero or more occurances"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "-RaqUEnLrdtP",
        "outputId": "b97eed97-4678-449e-afb5-cf8ce1794601"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['th', 'th', 'th']"
            ]
          },
          "metadata": {},
          "execution_count": 20
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "re.findall('\\d', a)"
      ],
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        "id": "rzqqM-5ordwg",
        "outputId": "0022695f-41ef-4fe8-8a45-03e84832e593"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['4', '5']"
            ]
          },
          "metadata": {},
          "execution_count": 46
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "re.findall('[ad]', a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "8IAEsnbjrd0S",
        "outputId": "a4926787-61dd-490c-caf9-ba46197f1579"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['a', 'a', 'd', 'a', 'a', 'a', 'd']"
            ]
          },
          "metadata": {},
          "execution_count": 50
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a = \"my name is hemalatha reddy,i am doing good now \"\n",
        "re.findall(\"he.+\",a)"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "MBojF5ofrd3t",
        "outputId": "e02e8b2f-5e9e-401c-801a-f20353b77784"
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      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['hemalatha reddy,i am doing good now ']"
            ]
          },
          "metadata": {},
          "execution_count": 55
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "a[1:]"
      ],
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        "id": "PR4n_IIfrd7I",
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      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "'y name is hemalatha reddy,i am doing good now '"
            ],
            "application/vnd.google.colaboratory.intrinsic+json": {
              "type": "string"
            }
          },
          "metadata": {},
          "execution_count": 56
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "c = \"Hello\"\n",
        "re.findall('He.*o',c)\n"
      ],
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "l2ddr5V1rd_J",
        "outputId": "6f295344-c12e-4b50-a923-c9c866ce9378"
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      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['Hello']"
            ]
          },
          "metadata": {},
          "execution_count": 60
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "c = \"Hello\"\n",
        "re.findall('He.+o',c)\n"
      ],
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        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "NTA7B5BAreCb",
        "outputId": "9de0ca97-f9d0-453e-806f-4fd7cb760c4f"
      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['Hello']"
            ]
          },
          "metadata": {},
          "execution_count": 61
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "re.findall('[a-d]', a)"
      ],
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        "id": "tEWJhC_RreGQ",
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      },
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "['a', 'a', 'a', 'a', 'd', 'd', 'a', 'd', 'd']"
            ]
          },
          "metadata": {},
          "execution_count": 62
        }
      ]
    },
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