01-data-stores.ipynb

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   "source": [
    "# AVL Demo notebook 1: xcube data stores"
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    "This notebook demonstrates the usage of xcube data stores. A *data store* is a Python object generated by xcube, providing easy, uniform access to one of a range of data sources – for example, locally stored files, remote object storage, or an online data access API. You can create a data store using xcube’s `new_data_store` function; for convenience, several data stores are already predefined in AVL:"
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    "## Summary of pre-defined data stores\n",
    "\n",
    "| store name | description |\n",
    "|---|---|\n",
    "| `lab_store` | file data in your Jupyter Lab environment (also visible in the file chooser on the left) |\n",
    "| `user_store` | Your personal, private object storage. Only you can read and write data here. |\n",
    "| `public_store_write` | Your publicly shared object storage. Only you can write to it, but all AVL users can read it. |\n",
    "| `public_store_read` | Everyone’s publicly shared object storage. You can read both your own and other users’ publicly shared data here. |\n",
    "| `scratch_store` | Insecure, temporary shared storage. All AVL users can read and write freely, and data are deleted automatically after two days. |\n",
    "| `data_store` | Pre-processed, standard data sets made available for all users by the AVL project. |\n",
    "| `staging_store` | A staging area for the `data_store` store. Data here are migrated to `data_store` once they have been thoroughly tested. |\n",
    "| `test_store` | A pre-staging area for `staging_store` and `data_store`. Data here are migrated to `staging_store` after some initial testing. |"
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   "id": "4bc23ab4-a797-4b20-8a04-70d649f49835",
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   "source": [
    "Note that these predefined stores are only available from within the AVL environment."
   ]
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   "source": [
    "## Preliminary set-up"
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   "source": [
    "First we set up some functions and variables which will be needed for the demonstration."
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    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Hello pont-us!\n"
     ]
    }
   ],
   "source": [
    "import os\n",
    "from xcube.core.new import new_cube\n",
    "from xcube.core.store import new_data_store\n",
    "\n",
    "my_username = os.environ['JUPYTERHUB_USER']\n",
    "print(f\"Hello {my_username}!\")"
   ]
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   "source": [
    "We’ve set the variable `my_username` to the name of the currently logged in user – this will be useful when writing to the public user bucket."
   ]
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   "source": [
    "## List the datasets in a store"
   ]
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   "source": [
    "You can list the identifiers of a store’s datasets with the `get_data_ids` function. For a remote store containing a lot of data, this may take a little while."
   ]
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    "list(staging_store.get_data_ids())"
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   "source": [
    "## Write a dataset to a store"
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   "source": [
    "First we create and view a simple data cube containing some example data."
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       ".xr-var-list > li:nth-child(odd) > div,\n",
       ".xr-var-list > li:nth-child(odd) > label,\n",
       ".xr-var-list > li:nth-child(odd) > .xr-var-name span {\n",
       "  background-color: var(--xr-background-color-row-odd);\n",
       "}\n",
       "\n",
       ".xr-var-name {\n",
       "  grid-column: 1;\n",
       "}\n",
       "\n",
       ".xr-var-dims {\n",
       "  grid-column: 2;\n",
       "}\n",
       "\n",
       ".xr-var-dtype {\n",
       "  grid-column: 3;\n",
       "  text-align: right;\n",
       "  color: var(--xr-font-color2);\n",
       "}\n",
       "\n",
       ".xr-var-preview {\n",
       "  grid-column: 4;\n",
       "}\n",
       "\n",
       ".xr-var-name,\n",
       ".xr-var-dims,\n",
       ".xr-var-dtype,\n",
       ".xr-preview,\n",
       ".xr-attrs dt {\n",
       "  white-space: nowrap;\n",
       "  overflow: hidden;\n",
       "  text-overflow: ellipsis;\n",
       "  padding-right: 10px;\n",
       "}\n",
       "\n",
       ".xr-var-name:hover,\n",
       ".xr-var-dims:hover,\n",
       ".xr-var-dtype:hover,\n",
       ".xr-attrs dt:hover {\n",
       "  overflow: visible;\n",
       "  width: auto;\n",
       "  z-index: 1;\n",
       "}\n",
       "\n",
       ".xr-var-attrs,\n",
       ".xr-var-data {\n",
       "  display: none;\n",
       "  background-color: var(--xr-background-color) !important;\n",
       "  padding-bottom: 5px !important;\n",
       "}\n",
       "\n",
       ".xr-var-attrs-in:checked ~ .xr-var-attrs,\n",
       ".xr-var-data-in:checked ~ .xr-var-data {\n",
       "  display: block;\n",
       "}\n",
       "\n",
       ".xr-var-data > table {\n",
       "  float: right;\n",
       "}\n",
       "\n",
       ".xr-var-name span,\n",
       ".xr-var-data,\n",
       ".xr-attrs {\n",
       "  padding-left: 25px !important;\n",
       "}\n",
       "\n",
       ".xr-attrs,\n",
       ".xr-var-attrs,\n",
       ".xr-var-data {\n",
       "  grid-column: 1 / -1;\n",
       "}\n",
       "\n",
       "dl.xr-attrs {\n",
       "  padding: 0;\n",
       "  margin: 0;\n",
       "  display: grid;\n",
       "  grid-template-columns: 125px auto;\n",
       "}\n",
       "\n",
       ".xr-attrs dt,\n",
       ".xr-attrs dd {\n",
       "  padding: 0;\n",
       "  margin: 0;\n",
       "  float: left;\n",
       "  padding-right: 10px;\n",
       "  width: auto;\n",
       "}\n",
       "\n",
       ".xr-attrs dt {\n",
       "  font-weight: normal;\n",
       "  grid-column: 1;\n",
       "}\n",
       "\n",
       ".xr-attrs dt:hover span {\n",
       "  display: inline-block;\n",
       "  background: var(--xr-background-color);\n",
       "  padding-right: 10px;\n",
       "}\n",
       "\n",
       ".xr-attrs dd {\n",
       "  grid-column: 2;\n",
       "  white-space: pre-wrap;\n",
       "  word-break: break-all;\n",
       "}\n",
       "\n",
       ".xr-icon-database,\n",
       ".xr-icon-file-text2 {\n",
       "  display: inline-block;\n",
       "  vertical-align: middle;\n",
       "  width: 1em;\n",
       "  height: 1.5em !important;\n",
       "  stroke-width: 0;\n",
       "  stroke: currentColor;\n",
       "  fill: currentColor;\n",
       "}\n",
       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.Dataset&gt;\n",
       "Dimensions:      (time: 5, lat: 180, lon: 360, bnds: 2)\n",
       "Coordinates:\n",
       "  * lon          (lon) float64 -179.5 -178.5 -177.5 -176.5 ... 177.5 178.5 179.5\n",
       "  * lat          (lat) float64 -89.5 -88.5 -87.5 -86.5 ... 86.5 87.5 88.5 89.5\n",
       "  * time         (time) datetime64[ns] 2010-01-01T12:00:00 ... 2010-01-05T12:...\n",
       "    lon_bnds     (lon, bnds) float64 -180.0 -179.0 -179.0 ... 179.0 179.0 180.0\n",
       "    lat_bnds     (lat, bnds) float64 -90.0 -89.0 -89.0 -88.0 ... 89.0 89.0 90.0\n",
       "    time_bnds    (time, bnds) datetime64[ns] 2010-01-01 ... 2010-01-06\n",
       "Dimensions without coordinates: bnds\n",
       "Data variables:\n",
       "    my_variable  (time, lat, lon) float64 1.0 1.0 1.0 1.0 ... 1.0 1.0 1.0 1.0\n",
       "Attributes:\n",
       "    Conventions:           CF-1.7\n",
       "    title:                 Test Cube\n",
       "    time_coverage_start:   2010-01-01T00:00:00\n",
       "    time_coverage_end:     2010-01-06T00:00:00\n",
       "    geospatial_lon_min:    -180.0\n",
       "    geospatial_lon_max:    180.0\n",
       "    geospatial_lon_units:  degrees_east\n",
       "    geospatial_lat_min:    -90.0\n",
       "    geospatial_lat_max:    90.0\n",
       "    geospatial_lat_units:  degrees_north</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.Dataset</div></div><ul class='xr-sections'><li class='xr-section-item'><input id='section-6bac6d5b-8d80-4c0b-8307-52cf84cfed2a' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-6bac6d5b-8d80-4c0b-8307-52cf84cfed2a' class='xr-section-summary'  title='Expand/collapse section'>Dimensions:</label><div class='xr-section-inline-details'><ul class='xr-dim-list'><li><span class='xr-has-index'>time</span>: 5</li><li><span class='xr-has-index'>lat</span>: 180</li><li><span class='xr-has-index'>lon</span>: 360</li><li><span>bnds</span>: 2</li></ul></div><div class='xr-section-details'></div></li><li class='xr-section-item'><input id='section-5b116d98-2809-496b-ab4b-9e247be8285d' class='xr-section-summary-in' type='checkbox'  checked><label for='section-5b116d98-2809-496b-ab4b-9e247be8285d' class='xr-section-summary' >Coordinates: <span>(6)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lon</span></div><div class='xr-var-dims'>(lon)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>-179.5 -178.5 ... 178.5 179.5</div><input id='attrs-59621096-b9bf-437c-9f8f-b2f8a169ffba' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-59621096-b9bf-437c-9f8f-b2f8a169ffba' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-d237aab2-22e7-4de6-b3a0-bd6be08a2b45' class='xr-var-data-in' type='checkbox'><label for='data-d237aab2-22e7-4de6-b3a0-bd6be08a2b45' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>degrees_east</dd><dt><span>long_name :</span></dt><dd>longitude</dd><dt><span>standard_name :</span></dt><dd>longitude</dd><dt><span>bounds :</span></dt><dd>lon_bnds</dd></dl></div><div class='xr-var-data'><pre>array([-179.5, -178.5, -177.5, ...,  177.5,  178.5,  179.5])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lat</span></div><div class='xr-var-dims'>(lat)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>-89.5 -88.5 -87.5 ... 88.5 89.5</div><input id='attrs-e2911af6-c516-493e-a3f5-8731bdbe6838' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-e2911af6-c516-493e-a3f5-8731bdbe6838' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-84699de1-efda-47fb-8349-8da9357c5095' class='xr-var-data-in' type='checkbox'><label for='data-84699de1-efda-47fb-8349-8da9357c5095' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>degrees_north</dd><dt><span>long_name :</span></dt><dd>latitude</dd><dt><span>standard_name :</span></dt><dd>latitude</dd><dt><span>bounds :</span></dt><dd>lat_bnds</dd></dl></div><div class='xr-var-data'><pre>array([-89.5, -88.5, -87.5, -86.5, -85.5, -84.5, -83.5, -82.5, -81.5, -80.5,\n",
       "       -79.5, -78.5, -77.5, -76.5, -75.5, -74.5, -73.5, -72.5, -71.5, -70.5,\n",
       "       -69.5, -68.5, -67.5, -66.5, -65.5, -64.5, -63.5, -62.5, -61.5, -60.5,\n",
       "       -59.5, -58.5, -57.5, -56.5, -55.5, -54.5, -53.5, -52.5, -51.5, -50.5,\n",
       "       -49.5, -48.5, -47.5, -46.5, -45.5, -44.5, -43.5, -42.5, -41.5, -40.5,\n",
       "       -39.5, -38.5, -37.5, -36.5, -35.5, -34.5, -33.5, -32.5, -31.5, -30.5,\n",
       "       -29.5, -28.5, -27.5, -26.5, -25.5, -24.5, -23.5, -22.5, -21.5, -20.5,\n",
       "       -19.5, -18.5, -17.5, -16.5, -15.5, -14.5, -13.5, -12.5, -11.5, -10.5,\n",
       "        -9.5,  -8.5,  -7.5,  -6.5,  -5.5,  -4.5,  -3.5,  -2.5,  -1.5,  -0.5,\n",
       "         0.5,   1.5,   2.5,   3.5,   4.5,   5.5,   6.5,   7.5,   8.5,   9.5,\n",
       "        10.5,  11.5,  12.5,  13.5,  14.5,  15.5,  16.5,  17.5,  18.5,  19.5,\n",
       "        20.5,  21.5,  22.5,  23.5,  24.5,  25.5,  26.5,  27.5,  28.5,  29.5,\n",
       "        30.5,  31.5,  32.5,  33.5,  34.5,  35.5,  36.5,  37.5,  38.5,  39.5,\n",
       "        40.5,  41.5,  42.5,  43.5,  44.5,  45.5,  46.5,  47.5,  48.5,  49.5,\n",
       "        50.5,  51.5,  52.5,  53.5,  54.5,  55.5,  56.5,  57.5,  58.5,  59.5,\n",
       "        60.5,  61.5,  62.5,  63.5,  64.5,  65.5,  66.5,  67.5,  68.5,  69.5,\n",
       "        70.5,  71.5,  72.5,  73.5,  74.5,  75.5,  76.5,  77.5,  78.5,  79.5,\n",
       "        80.5,  81.5,  82.5,  83.5,  84.5,  85.5,  86.5,  87.5,  88.5,  89.5])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>time</span></div><div class='xr-var-dims'>(time)</div><div class='xr-var-dtype'>datetime64[ns]</div><div class='xr-var-preview xr-preview'>2010-01-01T12:00:00 ... 2010-01-...</div><input id='attrs-5010b5a5-0aa9-4a18-b720-cb38dd9bacab' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-5010b5a5-0aa9-4a18-b720-cb38dd9bacab' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-aa3c1b23-e7c7-48c9-824b-ab8b8c323537' class='xr-var-data-in' type='checkbox'><label for='data-aa3c1b23-e7c7-48c9-824b-ab8b8c323537' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>bounds :</span></dt><dd>time_bnds</dd></dl></div><div class='xr-var-data'><pre>array([&#x27;2010-01-01T12:00:00.000000000&#x27;, &#x27;2010-01-02T12:00:00.000000000&#x27;,\n",
       "       &#x27;2010-01-03T12:00:00.000000000&#x27;, &#x27;2010-01-04T12:00:00.000000000&#x27;,\n",
       "       &#x27;2010-01-05T12:00:00.000000000&#x27;], dtype=&#x27;datetime64[ns]&#x27;)</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lon_bnds</span></div><div class='xr-var-dims'>(lon, bnds)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>-180.0 -179.0 ... 179.0 180.0</div><input id='attrs-b4f05445-5a66-450a-931a-6f1fe307c311' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-b4f05445-5a66-450a-931a-6f1fe307c311' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-232b7531-949e-432c-b9e7-c938ccea5479' class='xr-var-data-in' type='checkbox'><label for='data-232b7531-949e-432c-b9e7-c938ccea5479' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>degrees_east</dd></dl></div><div class='xr-var-data'><pre>array([[-180., -179.],\n",
       "       [-179., -178.],\n",
       "       [-178., -177.],\n",
       "       [-177., -176.],\n",
       "       [-176., -175.],\n",
       "       [-175., -174.],\n",
       "       [-174., -173.],\n",
       "       [-173., -172.],\n",
       "       [-172., -171.],\n",
       "       [-171., -170.],\n",
       "       [-170., -169.],\n",
       "       [-169., -168.],\n",
       "       [-168., -167.],\n",
       "       [-167., -166.],\n",
       "       [-166., -165.],\n",
       "       [-165., -164.],\n",
       "       [-164., -163.],\n",
       "       [-163., -162.],\n",
       "       [-162., -161.],\n",
       "       [-161., -160.],\n",
       "...\n",
       "       [ 160.,  161.],\n",
       "       [ 161.,  162.],\n",
       "       [ 162.,  163.],\n",
       "       [ 163.,  164.],\n",
       "       [ 164.,  165.],\n",
       "       [ 165.,  166.],\n",
       "       [ 166.,  167.],\n",
       "       [ 167.,  168.],\n",
       "       [ 168.,  169.],\n",
       "       [ 169.,  170.],\n",
       "       [ 170.,  171.],\n",
       "       [ 171.,  172.],\n",
       "       [ 172.,  173.],\n",
       "       [ 173.,  174.],\n",
       "       [ 174.,  175.],\n",
       "       [ 175.,  176.],\n",
       "       [ 176.,  177.],\n",
       "       [ 177.,  178.],\n",
       "       [ 178.,  179.],\n",
       "       [ 179.,  180.]])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>lat_bnds</span></div><div class='xr-var-dims'>(lat, bnds)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>-90.0 -89.0 -89.0 ... 89.0 90.0</div><input id='attrs-a52de104-bac0-4bbe-b73b-ef1681a77854' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-a52de104-bac0-4bbe-b73b-ef1681a77854' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e0cd2f64-b945-4d0b-bd18-bb78e72c78c8' class='xr-var-data-in' type='checkbox'><label for='data-e0cd2f64-b945-4d0b-bd18-bb78e72c78c8' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>units :</span></dt><dd>degrees_north</dd></dl></div><div class='xr-var-data'><pre>array([[-90., -89.],\n",
       "       [-89., -88.],\n",
       "       [-88., -87.],\n",
       "       [-87., -86.],\n",
       "       [-86., -85.],\n",
       "       [-85., -84.],\n",
       "       [-84., -83.],\n",
       "       [-83., -82.],\n",
       "       [-82., -81.],\n",
       "       [-81., -80.],\n",
       "       [-80., -79.],\n",
       "       [-79., -78.],\n",
       "       [-78., -77.],\n",
       "       [-77., -76.],\n",
       "       [-76., -75.],\n",
       "       [-75., -74.],\n",
       "       [-74., -73.],\n",
       "       [-73., -72.],\n",
       "       [-72., -71.],\n",
       "       [-71., -70.],\n",
       "...\n",
       "       [ 70.,  71.],\n",
       "       [ 71.,  72.],\n",
       "       [ 72.,  73.],\n",
       "       [ 73.,  74.],\n",
       "       [ 74.,  75.],\n",
       "       [ 75.,  76.],\n",
       "       [ 76.,  77.],\n",
       "       [ 77.,  78.],\n",
       "       [ 78.,  79.],\n",
       "       [ 79.,  80.],\n",
       "       [ 80.,  81.],\n",
       "       [ 81.,  82.],\n",
       "       [ 82.,  83.],\n",
       "       [ 83.,  84.],\n",
       "       [ 84.,  85.],\n",
       "       [ 85.,  86.],\n",
       "       [ 86.,  87.],\n",
       "       [ 87.,  88.],\n",
       "       [ 88.,  89.],\n",
       "       [ 89.,  90.]])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>time_bnds</span></div><div class='xr-var-dims'>(time, bnds)</div><div class='xr-var-dtype'>datetime64[ns]</div><div class='xr-var-preview xr-preview'>2010-01-01 ... 2010-01-06</div><input id='attrs-72ca148c-bad3-46fc-96c9-7a56e1feabfc' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-72ca148c-bad3-46fc-96c9-7a56e1feabfc' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-a6e310d8-74c7-44f3-851c-f220807922e2' class='xr-var-data-in' type='checkbox'><label for='data-a6e310d8-74c7-44f3-851c-f220807922e2' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([[&#x27;2010-01-01T00:00:00.000000000&#x27;, &#x27;2010-01-02T00:00:00.000000000&#x27;],\n",
       "       [&#x27;2010-01-02T00:00:00.000000000&#x27;, &#x27;2010-01-03T00:00:00.000000000&#x27;],\n",
       "       [&#x27;2010-01-03T00:00:00.000000000&#x27;, &#x27;2010-01-04T00:00:00.000000000&#x27;],\n",
       "       [&#x27;2010-01-04T00:00:00.000000000&#x27;, &#x27;2010-01-05T00:00:00.000000000&#x27;],\n",
       "       [&#x27;2010-01-05T00:00:00.000000000&#x27;, &#x27;2010-01-06T00:00:00.000000000&#x27;]],\n",
       "      dtype=&#x27;datetime64[ns]&#x27;)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-f9442174-465f-4a52-a9f7-c5b08a1989fb' class='xr-section-summary-in' type='checkbox'  checked><label for='section-f9442174-465f-4a52-a9f7-c5b08a1989fb' class='xr-section-summary' >Data variables: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>my_variable</span></div><div class='xr-var-dims'>(time, lat, lon)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>1.0 1.0 1.0 1.0 ... 1.0 1.0 1.0 1.0</div><input id='attrs-c973a0df-630c-4f01-adda-f62cd0469092' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-c973a0df-630c-4f01-adda-f62cd0469092' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e63e7956-fdb9-46db-8ae3-da0d384dacb9' class='xr-var-data-in' type='checkbox'><label for='data-e63e7956-fdb9-46db-8ae3-da0d384dacb9' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([[[1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        ...,\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.]],\n",
       "\n",
       "       [[1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        ...,\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.]],\n",
       "\n",
       "       [[1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        ...,\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.]],\n",
       "\n",
       "       [[1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        ...,\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.]],\n",
       "\n",
       "       [[1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        ...,\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.],\n",
       "        [1., 1., 1., ..., 1., 1., 1.]]])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-9982cca7-cbe9-404e-98e0-3c1f5169be40' class='xr-section-summary-in' type='checkbox'  ><label for='section-9982cca7-cbe9-404e-98e0-3c1f5169be40' class='xr-section-summary' >Attributes: <span>(10)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>Conventions :</span></dt><dd>CF-1.7</dd><dt><span>title :</span></dt><dd>Test Cube</dd><dt><span>time_coverage_start :</span></dt><dd>2010-01-01T00:00:00</dd><dt><span>time_coverage_end :</span></dt><dd>2010-01-06T00:00:00</dd><dt><span>geospatial_lon_min :</span></dt><dd>-180.0</dd><dt><span>geospatial_lon_max :</span></dt><dd>180.0</dd><dt><span>geospatial_lon_units :</span></dt><dd>degrees_east</dd><dt><span>geospatial_lat_min :</span></dt><dd>-90.0</dd><dt><span>geospatial_lat_max :</span></dt><dd>90.0</dd><dt><span>geospatial_lat_units :</span></dt><dd>degrees_north</dd></dl></div></li></ul></div></div>"
      ],
      "text/plain": [
       "<xarray.Dataset>\n",
       "Dimensions:      (time: 5, lat: 180, lon: 360, bnds: 2)\n",
       "Coordinates:\n",
       "  * lon          (lon) float64 -179.5 -178.5 -177.5 -176.5 ... 177.5 178.5 179.5\n",
       "  * lat          (lat) float64 -89.5 -88.5 -87.5 -86.5 ... 86.5 87.5 88.5 89.5\n",
       "  * time         (time) datetime64[ns] 2010-01-01T12:00:00 ... 2010-01-05T12:...\n",
       "    lon_bnds     (lon, bnds) float64 -180.0 -179.0 -179.0 ... 179.0 179.0 180.0\n",
       "    lat_bnds     (lat, bnds) float64 -90.0 -89.0 -89.0 -88.0 ... 89.0 89.0 90.0\n",
       "    time_bnds    (time, bnds) datetime64[ns] 2010-01-01 ... 2010-01-06\n",
       "Dimensions without coordinates: bnds\n",
       "Data variables:\n",
       "    my_variable  (time, lat, lon) float64 1.0 1.0 1.0 1.0 ... 1.0 1.0 1.0 1.0\n",
       "Attributes:\n",
       "    Conventions:           CF-1.7\n",
       "    title:                 Test Cube\n",
       "    time_coverage_start:   2010-01-01T00:00:00\n",
       "    time_coverage_end:     2010-01-06T00:00:00\n",
       "    geospatial_lon_min:    -180.0\n",
       "    geospatial_lon_max:    180.0\n",
       "    geospatial_lon_units:  degrees_east\n",
       "    geospatial_lat_min:    -90.0\n",
       "    geospatial_lat_max:    90.0\n",
       "    geospatial_lat_units:  degrees_north"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "cube = new_cube(variables=dict(my_variable=1.0))\n",
    "cube"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "fdc788a1-f731-44d7-93f0-d8b47d73942e",
   "metadata": {
    "tags": []
   },
   "source": [
    "Now we write this to our publicly shared data store. We specify `replace=True` to overwrite any existing dataset with the same name."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "2d3508a5-e84c-4e02-a6c7-ade5198b18b6",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'my_test_data_1.zarr'"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "public_store_write.write_data(data=cube, data_id=\"my_test_data_1.zarr\", replace=True)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "ff0d3539-659a-4320-ad20-c28030f8cf20",
   "metadata": {},
   "source": [
    "The data is now readable to all AVL users through the `public_store_read` data store. If we list the IDs in `public_store_read`, we can see it under our own user prefix."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "0baa8567-7793-4f6c-b345-cc5679c7a31a",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['pont-us/my_test_data_1.zarr']"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "list(public_store_read.get_data_ids())"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "13b3db9b-3c0e-4e71-8a7d-c091841ba81c",
   "metadata": {},
   "source": [
    "## Delete a dataset from a store"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "65ccac6a-20bc-41ff-a9d1-3da3df30448a",
   "metadata": {},
   "source": [
    "It’s simple to delete a dataset from a store by ID, and listing the store’s IDs afterwards confirms that it’s gone."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "277aadae-ad0c-4ea8-a152-52fc98fbb7a2",
   "metadata": {},
   "outputs": [],
   "source": [
    "public_store_write.delete_data(data_id=\"my_test_data_1.zarr\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "5366027b-21c4-42be-8d12-3805709d5310",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[]"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "list(public_store_write.get_data_ids())"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "703bffa8-45fb-4164-bd37-eee3232355f2",
   "metadata": {},
   "source": [
    "## Creating your own data stores"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "8d875e86-709a-4864-871e-71d3c2173516",
   "metadata": {},
   "source": [
    "As well as using the AVL’s predefined data stores, you can create your own using the `xcube.core.store.new_data_store` function. Look at the [xcube data store example notebook](https://github.com/dcs4cop/xcube/blob/master/examples/notebooks/datastores/1_getting_started.ipynb) for more details on the types of data stores available and how to create and use them."
   ]
  }
 ],
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