py/13/bolivia_download_30m_NASADEM_amrit.ipynb

{
  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {
        "colab_type": "text",
        "id": "view-in-github"
      },
      "source": [
        "<a href=\"https://colab.research.google.com/github/amrit-thapa-2044/colab_miscellaneous/blob/main/download_30m_NASADEM_amrit.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Ref: https://twitter.com/amrit2044/status/1548843870288371712?t=yRv5iv4ouxcH5-rL2f8SJw&s=09\n",
        "Are you looking for a high-resolution digital elevation model? I have prepared a Google Colab notebook that can download NASADEM of 30m resolution from GEE"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "xLOfDtFyvzj1"
      },
      "source": [
        "Detail about the NASA SRTM 30m data is [here](https://developers.google.com/earth-engine/datasets/catalog/NASA_NASADEM_HGT_001)."
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "jTh8mP2yqiMz"
      },
      "source": [
        "# Installing and loading packages"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "id": "41v_cz3IKy7j"
      },
      "outputs": [],
      "source": [
        "!pip install geemap"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "YFilkzBArmdJ"
      },
      "source": [
        "Before executing following steps, click restart runtime tab if it appears after executing above step."
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 67,
      "metadata": {
        "id": "9feJiS0wKy7k"
      },
      "outputs": [],
      "source": [
        "import ee\n",
        "import geemap.eefolium as geemap\n",
        "import os\n",
        "from datetime import datetime"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "7QaEdZsjtkz7"
      },
      "source": [
        "# Authenticating and initializing"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 68,
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Ke0tQRvgtZ0H",
        "outputId": "3776be6d-ae4d-4ed9-85bc-360fd2468a0d"
      },
      "outputs": [],
      "source": [
        "# Trigger the authentication flow.\n",
        "#ee.Authenticate()\n",
        "\n",
        "# Initialize the library.\n",
        "ee.Initialize()"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "-8KPBClVKy7l"
      },
      "source": [
        "# Setting an output directory"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 69,
      "metadata": {
        "id": "sh_5pUqsKy7l"
      },
      "outputs": [],
      "source": [
        "out_dir = os.path.expanduser(\"/home/yoviajo/Documentos/lab/geom/97/srtm_descarga\")\n",
        "\n",
        "if not os.path.exists(out_dir):\n",
        "    os.makedirs(out_dir)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "PrsmL3CEKy7m"
      },
      "source": [
        "# Defining bounding box (roi)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "ANjIHcRnKy7n"
      },
      "source": [
        "Define your area of interest in a closed loop to form polygon. Example: [[x1 (longitude),y1(latitude)],[x2,y2],[x3,y3],[x4,y4],[x1,y1]].\n",
        "\n",
        "**NOTE**: *The dimention of the boundig box must be less than or equal to 10000 for now.*"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 12,
      "metadata": {
        "id": "M_LCW0CoiYBH"
      },
      "outputs": [],
      "source": [
        "my_aoi_name='samaipata_'"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 70,
      "metadata": {},
      "outputs": [],
      "source": [
        "my_aoi_name='tarija'"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Samaipata y alrededores"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 4,
      "metadata": {
        "id": "LVe7gcaUKy7o"
      },
      "outputs": [],
      "source": [
        "roi = ee.Geometry.Polygon(coords = [[[-63.915195, -18.210682], [-63.915195, -18.150582], [-63.833914, -18.150582], [-63.833914, -18.210682], [-63.915195, -18.210682]]])\n",
        "# NOTE: Pixel grid dimensions must be less than or equal to 10000."
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Dpto. de Tarija, oeste"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 71,
      "metadata": {},
      "outputs": [],
      "source": [
        "roi = ee.Geometry.Polygon(coords = [[[-65.072021, -22.083095], [-65.072021, -21.145992], [-64.135437, -21.145992], [-64.135437, -22.083095], [-65.072021, -22.083095]]])"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 72,
      "metadata": {
        "id": "bVLLavG4gLJe"
      },
      "outputs": [
        {
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              "\n",
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              "        \n",
              "    \n",
              "            var tile_layer_0a68acaaa891684ae8b51a556ae0ad32 = L.tileLayer(\n",
              "                &quot;https://mt1.google.com/vt/lyrs=m\\u0026x={x}\\u0026y={y}\\u0026z={z}&quot;,\n",
              "                {&quot;attribution&quot;: &quot;Google&quot;, &quot;detectRetina&quot;: false, &quot;maxNativeZoom&quot;: 18, &quot;maxZoom&quot;: 18, &quot;minZoom&quot;: 0, &quot;noWrap&quot;: false, &quot;opacity&quot;: 1, &quot;subdomains&quot;: &quot;abc&quot;, &quot;tms&quot;: false}\n",
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              "                        .setContent(&quot;Latitude: &quot; + e.latlng.lat.toFixed(4) +\n",
              "                                    &quot;&lt;br&gt;Longitude: &quot; + e.latlng.lng.toFixed(4))\n",
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              "                [[20, 0], [20, 0]],\n",
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              "        \n",
              "    \n",
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              "                &quot;https://earthengine.googleapis.com/v1alpha/projects/earthengine-legacy/maps/64a574555d45d2f0e138986e6a8c3813-7ed6f696d43285ea677ac566549abd2b/tiles/{z}/{x}/{y}&quot;,\n",
              "                {&quot;attribution&quot;: &quot;Google Earth Engine&quot;, &quot;detectRetina&quot;: false, &quot;maxNativeZoom&quot;: 18, &quot;maxZoom&quot;: 18, &quot;minZoom&quot;: 0, &quot;noWrap&quot;: false, &quot;opacity&quot;: 1.0, &quot;subdomains&quot;: &quot;abc&quot;, &quot;tms&quot;: false}\n",
              "            ).addTo(map_e69c55b3cbbcdeb48b2ddac946640e13);\n",
              "        \n",
              "    \n",
              "            map_e69c55b3cbbcdeb48b2ddac946640e13.fitBounds(\n",
              "                [[-21.614692725857086, -64.60372900000021], [-21.614692725857086, -64.60372900000021]],\n",
              "                {&quot;maxZoom&quot;: 9}\n",
              "            );\n",
              "        \n",
              "    \n",
              "            var layer_control_6c8d0a9425b1849a777b720e8b6ed41c = {\n",
              "                base_layers : {\n",
              "                    &quot;openstreetmap&quot; : tile_layer_f055da06f6ee9f6880fb1429f3c701f4,\n",
              "                },\n",
              "                overlays :  {\n",
              "                    &quot;Google Maps&quot; : tile_layer_0a68acaaa891684ae8b51a556ae0ad32,\n",
              "                    &quot;my_aoi&quot; : tile_layer_a801e603049144d1740f3136c2f3adda,\n",
              "                },\n",
              "            };\n",
              "            L.control.layers(\n",
              "                layer_control_6c8d0a9425b1849a777b720e8b6ed41c.base_layers,\n",
              "                layer_control_6c8d0a9425b1849a777b720e8b6ed41c.overlays,\n",
              "                {&quot;autoZIndex&quot;: true, &quot;collapsed&quot;: true, &quot;position&quot;: &quot;topright&quot;}\n",
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            "text/plain": [
              "<geemap.eefolium.Map at 0x7efdf0aeb7c0>"
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          },
          "execution_count": 72,
          "metadata": {},
          "output_type": "execute_result"
        }
      ],
      "source": [
        "Map = geemap.Map()\n",
        "Map.addLayer(roi, {'color': 'orange'}, 'my_aoi');\n",
        "Map.centerObject(roi, 9);\n",
        "Map"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "c-p0hBPmKy7p"
      },
      "source": [
        "## Loading image from GEE"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 73,
      "metadata": {
        "id": "d-gaP5-OKy7p"
      },
      "outputs": [],
      "source": [
        "# Add Earth Engine dataset\n",
        "image = ee.Image(\"NASA/NASADEM_HGT/001\").select('elevation')"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "jBgGLlw3Ky7p"
      },
      "source": [
        "# Masking and displaying image"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 74,
      "metadata": {
        "id": "HTTriR4vKy7r"
      },
      "outputs": [],
      "source": [
        "image_clip = image.clip(roi)"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 75,
      "metadata": {
        "id": "gqjVN59QKy7r"
      },
      "outputs": [
        {
          "data": {
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              "<div style=\"width:100%;\"><div style=\"position:relative;width:100%;height:0;padding-bottom:60%;\"><span style=\"color:#565656\">Make this Notebook Trusted to load map: File -> Trust Notebook</span><iframe srcdoc=\"&lt;!DOCTYPE html&gt;\n",
              "&lt;head&gt;    \n",
              "    &lt;meta http-equiv=&quot;content-type&quot; content=&quot;text/html; charset=UTF-8&quot; /&gt;\n",
              "    \n",
              "        &lt;script&gt;\n",
              "            L_NO_TOUCH = false;\n",
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              "    &lt;style&gt;#map {position:absolute;top:0;bottom:0;right:0;left:0;}&lt;/style&gt;\n",
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              "    &lt;link rel=&quot;stylesheet&quot; href=&quot;https://cdn.jsdelivr.net/npm/leaflet@1.6.0/dist/leaflet.css&quot;/&gt;\n",
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              "            var tile_layer_85b823c044dce7d4bdb4aa5df107585e = L.tileLayer(\n",
              "                &quot;https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png&quot;,\n",
              "                {&quot;attribution&quot;: &quot;Data by \\u0026copy; \\u003ca href=\\&quot;http://openstreetmap.org\\&quot;\\u003eOpenStreetMap\\u003c/a\\u003e, under \\u003ca href=\\&quot;http://www.openstreetmap.org/copyright\\&quot;\\u003eODbL\\u003c/a\\u003e.&quot;, &quot;detectRetina&quot;: false, &quot;maxNativeZoom&quot;: 18, &quot;maxZoom&quot;: 18, &quot;minZoom&quot;: 0, &quot;noWrap&quot;: false, &quot;opacity&quot;: 1, &quot;subdomains&quot;: &quot;abc&quot;, &quot;tms&quot;: false}\n",
              "            ).addTo(map_0d55171bd262580835b34b7d0da8aea0);\n",
              "        \n",
              "    \n",
              "            var tile_layer_0a68acaaa891684ae8b51a556ae0ad32 = L.tileLayer(\n",
              "                &quot;https://mt1.google.com/vt/lyrs=m\\u0026x={x}\\u0026y={y}\\u0026z={z}&quot;,\n",
              "                {&quot;attribution&quot;: &quot;Google&quot;, &quot;detectRetina&quot;: false, &quot;maxNativeZoom&quot;: 18, &quot;maxZoom&quot;: 18, &quot;minZoom&quot;: 0, &quot;noWrap&quot;: false, &quot;opacity&quot;: 1, &quot;subdomains&quot;: &quot;abc&quot;, &quot;tms&quot;: false}\n",
              "            ).addTo(map_0d55171bd262580835b34b7d0da8aea0);\n",
              "        \n",
              "    \n",
              "                var lat_lng_popup_b0fd763debd6fcf1e7f9cd9b71766707 = L.popup();\n",
              "                function latLngPop(e) {\n",
              "                    lat_lng_popup_b0fd763debd6fcf1e7f9cd9b71766707\n",
              "                        .setLatLng(e.latlng)\n",
              "                        .setContent(&quot;Latitude: &quot; + e.latlng.lat.toFixed(4) +\n",
              "                                    &quot;&lt;br&gt;Longitude: &quot; + e.latlng.lng.toFixed(4))\n",
              "                        .openOn(map_0d55171bd262580835b34b7d0da8aea0);\n",
              "                    }\n",
              "                map_0d55171bd262580835b34b7d0da8aea0.on(&#x27;click&#x27;, latLngPop);\n",
              "            \n",
              "    \n",
              "            L.control.fullscreen(\n",
              "                {&quot;forceSeparateButton&quot;: false, &quot;position&quot;: &quot;topleft&quot;, &quot;title&quot;: &quot;Full Screen&quot;, &quot;titleCancel&quot;: &quot;Exit Full Screen&quot;}\n",
              "            ).addTo(map_0d55171bd262580835b34b7d0da8aea0);\n",
              "        \n",
              "    \n",
              "            map_0d55171bd262580835b34b7d0da8aea0.fitBounds(\n",
              "                [[20, 0], [20, 0]],\n",
              "                {&quot;maxZoom&quot;: 2}\n",
              "            );\n",
              "        \n",
              "    \n",
              "            var tile_layer_6eae198ee3a894a5cf5f8e87771ecb64 = L.tileLayer(\n",
              "                &quot;https://earthengine.googleapis.com/v1alpha/projects/earthengine-legacy/maps/5c368024bec3a9111775a6a07151d37e-01aecb10ee6cd5aa2b9f268dd83dfe96/tiles/{z}/{x}/{y}&quot;,\n",
              "                {&quot;attribution&quot;: &quot;Google Earth Engine&quot;, &quot;detectRetina&quot;: false, &quot;maxNativeZoom&quot;: 18, &quot;maxZoom&quot;: 18, &quot;minZoom&quot;: 0, &quot;noWrap&quot;: false, &quot;opacity&quot;: 1.0, &quot;subdomains&quot;: &quot;abc&quot;, &quot;tms&quot;: false}\n",
              "            ).addTo(map_0d55171bd262580835b34b7d0da8aea0);\n",
              "        \n",
              "    \n",
              "            map_0d55171bd262580835b34b7d0da8aea0.fitBounds(\n",
              "                [[-22.083095, -65.072021], [-21.145992, -64.13543700000001]],\n",
              "                {&quot;maxZoom&quot;: 18}\n",
              "            );\n",
              "        \n",
              "    \n",
              "            var layer_control_16970a56f7e1a1b3c0b3e3db42258894 = {\n",
              "                base_layers : {\n",
              "                    &quot;openstreetmap&quot; : tile_layer_85b823c044dce7d4bdb4aa5df107585e,\n",
              "                },\n",
              "                overlays :  {\n",
              "                    &quot;Google Maps&quot; : tile_layer_0a68acaaa891684ae8b51a556ae0ad32,\n",
              "                    &quot;false color composite&quot; : tile_layer_6eae198ee3a894a5cf5f8e87771ecb64,\n",
              "                },\n",
              "            };\n",
              "            L.control.layers(\n",
              "                layer_control_16970a56f7e1a1b3c0b3e3db42258894.base_layers,\n",
              "                layer_control_16970a56f7e1a1b3c0b3e3db42258894.overlays,\n",
              "                {&quot;autoZIndex&quot;: true, &quot;collapsed&quot;: true, &quot;position&quot;: &quot;topright&quot;}\n",
              "            ).addTo(map_0d55171bd262580835b34b7d0da8aea0);\n",
              "        \n",
              "&lt;/script&gt;\" style=\"position:absolute;width:100%;height:100%;left:0;top:0;border:none !important;\" allowfullscreen webkitallowfullscreen mozallowfullscreen></iframe></div></div>"
            ],
            "text/plain": [
              "<geemap.eefolium.Map at 0x7efdf0aae410>"
            ]
          },
          "execution_count": 75,
          "metadata": {},
          "output_type": "execute_result"
        }
      ],
      "source": [
        "# Set visualization parameters.\n",
        "vis_params = {\n",
        "    'min': 0,\n",
        "    'max': 8848,\n",
        "    'palette': ['006633', 'E5FFCC', '662A00', 'D8D8D8', 'F5F5F5'],\n",
        "}\n",
        "\n",
        "# Create a default map\n",
        "Map = geemap.Map()\n",
        "\n",
        "# Center the map and display the image.\n",
        "Map.addLayer(image_clip, vis_params, 'false color composite')\n",
        "Map.centerObject(image_clip, 18);\n",
        "\n",
        "# Display the map\n",
        "Map"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "BsqdjY30SE8u"
      },
      "source": [
        "# Downloading image in colab directory"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 76,
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "hleQkeo7QWO5",
        "outputId": "bafd0a4c-20b4-44e1-97f0-5ce23d74c8d6"
      },
      "outputs": [
        {
          "name": "stdout",
          "output_type": "stream",
          "text": [
            "/home/yoviajo/Documentos/lab/geom/97/srtm_descarga/tarija_NASADEM_30m_09:57:01.tif\n"
          ]
        }
      ],
      "source": [
        "now = datetime.now()\n",
        "current_time = now.strftime(\"%H:%M:%S\")\n",
        "\n",
        "filename=out_dir+'/'+my_aoi_name+'_NASADEM_30m_'+current_time+'.tif'\n",
        "print(filename)\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 77,
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "K_EkMXA8Ky7r",
        "outputId": "fd4ac922-4c58-4b06-ceba-b0347debcb85"
      },
      "outputs": [
        {
          "name": "stdout",
          "output_type": "stream",
          "text": [
            "Generating URL ...\n",
            "Downloading data from https://earthengine.googleapis.com/v1alpha/projects/earthengine-legacy/thumbnails/60e8878c189fbf2b644cfb6d93c54f3d-72b8875ffaafb1912fa67bc49b18db6d:getPixels\n",
            "Please wait ...\n",
            "Data downloaded to /home/yoviajo/Documentos/lab/geom/97/srtm_descarga/tarija_NASADEM_30m_09:57:01.tif\n"
          ]
        }
      ],
      "source": [
        "geemap.ee_export_image(image_clip, filename=filename, scale=30, region=roi, file_per_band=False)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "Ouy2ltCbRQK8"
      },
      "source": [
        "# Downloading data to local machine"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": 13,
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 17
        },
        "id": "0sbTHAsaQ6ML",
        "outputId": "de78bd96-cc64-4e40-cf8b-b69db94e7cc9"
      },
      "outputs": [
        {
          "data": {
            "application/javascript": "\n    async function download(id, filename, size) {\n      if (!google.colab.kernel.accessAllowed) {\n        return;\n      }\n      const div = document.createElement('div');\n      const label = document.createElement('label');\n      label.textContent = `Downloading \"${filename}\": `;\n      div.appendChild(label);\n      const progress = document.createElement('progress');\n      progress.max = size;\n      div.appendChild(progress);\n      document.body.appendChild(div);\n\n      const buffers = [];\n      let downloaded = 0;\n\n      const channel = await google.colab.kernel.comms.open(id);\n      // Send a message to notify the kernel that we're ready.\n      channel.send({})\n\n      for await (const message of channel.messages) {\n        // Send a message to notify the kernel that we're ready.\n        channel.send({})\n        if (message.buffers) {\n          for (const buffer of message.buffers) {\n            buffers.push(buffer);\n            downloaded += buffer.byteLength;\n            progress.value = downloaded;\n          }\n        }\n      }\n      const blob = new Blob(buffers, {type: 'application/binary'});\n      const a = document.createElement('a');\n      a.href = window.URL.createObjectURL(blob);\n      a.download = filename;\n      div.appendChild(a);\n      a.click();\n      div.remove();\n    }\n  ",
            "text/plain": [
              "<IPython.core.display.Javascript object>"
            ]
          },
          "metadata": {},
          "output_type": "display_data"
        },
        {
          "data": {
            "application/javascript": "download(\"download_9d534e9c-6dcb-4a8d-aa7a-deeb270e6e26\", \"langtang_catchment__NASADEM_30m_01:07:19.tif\", 6214625)",
            "text/plain": [
              "<IPython.core.display.Javascript object>"
            ]
          },
          "metadata": {},
          "output_type": "display_data"
        }
      ],
      "source": [
        "from google.colab import files\n",
        "files.download(filename)"
      ]
    }
  ],
  "metadata": {
    "colab": {
      "collapsed_sections": [],
      "include_colab_link": true,
      "name": "download_30m_NASADEM_amrit.ipynb",
      "provenance": []
    },
    "hide_input": false,
    "kernelspec": {
      "display_name": "Python 3.10.5 ('geemap')",
      "language": "python",
      "name": "python3"
    },
    "language_info": {
      "codemirror_mode": {
        "name": "ipython",
        "version": 3
      },
      "file_extension": ".py",
      "mimetype": "text/x-python",
      "name": "python",
      "nbconvert_exporter": "python",
      "pygments_lexer": "ipython3",
      "version": "3.10.5"
    },
    "toc": {
      "base_numbering": 1,
      "nav_menu": {},
      "number_sections": true,
      "sideBar": true,
      "skip_h1_title": true,
      "title_cell": "Table of Contents",
      "title_sidebar": "Table of Contents",
      "toc_cell": false,
      "toc_position": {},
      "toc_section_display": true,
      "toc_window_display": true
    },
    "varInspector": {
      "cols": {
        "lenName": 16,
        "lenType": 16,
        "lenVar": 40
      },
      "kernels_config": {
        "python": {
          "delete_cmd_postfix": "",
          "delete_cmd_prefix": "del ",
          "library": "var_list.py",
          "varRefreshCmd": "print(var_dic_list())"
        },
        "r": {
          "delete_cmd_postfix": ") ",
          "delete_cmd_prefix": "rm(",
          "library": "var_list.r",
          "varRefreshCmd": "cat(var_dic_list()) "
        }
      },
      "types_to_exclude": [
        "module",
        "function",
        "builtin_function_or_method",
        "instance",
        "_Feature"
      ],
      "window_display": false
    },
    "vscode": {
      "interpreter": {
        "hash": "a1a7bebf36626153699dc5b9ba3362c3f8ccb8a2da15d68e9de5165e34010214"
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