Bokeh table select and download WIP.ipynb

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   "source": [
    "from os.path import dirname, join\n",
    "\n",
    "import pandas as pd\n",
    "\n",
    "from bokeh.io import push_notebook, show, output_notebook\n",
    "from bokeh.layouts import row, widgetbox\n",
    "from bokeh.models import ColumnDataSource, CustomJS\n",
    "from bokeh.models.widgets import Slider, Button, DataTable, TableColumn, NumberFormatter\n",
    "# from bokeh.io import curdoc\n",
    "output_notebook()"
   ]
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  {
   "cell_type": "code",
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   "source": [
    "downloadjs=\"\"\"var data = source.data;\n",
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    "    var currRow = [data['x'][i].toString(),\n",
    "                   data['y'][i].toString().concat('\\n')];\n",
    "\n",
    "    var joined = currRow.join();\n",
    "    filetext = filetext.concat(joined);\n",
    "}\n",
    "\n",
    "var filename = 'data_result.csv';\n",
    "var blob = new Blob([filetext], { type: 'text/csv;charset=utf-8;' });\n",
    "\n",
    "//addresses IE\n",
    "if (navigator.msSaveBlob) {\n",
    "    navigator.msSaveBlob(blob, filename);\n",
    "}\n",
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    "    var link = document.createElement(\"a\");\n",
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    "    link.style.visibility = 'hidden';\n",
    "    link.dispatchEvent(new MouseEvent('click'))\n",
    "}\n",
    "\"\"\""
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  {
   "cell_type": "code",
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   "metadata": {
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   },
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "import pandas as pd"
   ]
  },
  {
   "cell_type": "code",
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   "source": [
    "x = np.random.choice(list(\"ABCDEFG\"),10)\n",
    "y = np.arange(10)\n",
    "\n",
    "s = pd.DataFrame([x,y]).T\n",
    "s.columns = [\"x\",\"y\"]\n",
    "\n",
    "source = ColumnDataSource(s)\n",
    "\n",
    "\n",
    "button = Button(label=\"Download\", button_type=\"success\")\n",
    "button.callback = CustomJS(args=dict(source=source),code=downloadjs)\n",
    "\n",
    "\n",
    "columns = [\n",
    "    TableColumn(field=\"x\", title=\"x\"),\n",
    "    TableColumn(field=\"y\", title=\"y\")\n",
    "]\n",
    "\n",
    "data_table = DataTable(source=source, columns=columns, width=800)\n",
    "\n",
    "controls = widgetbox(button)\n",
    "table = widgetbox(data_table)\n",
    "show(row(controls,table))"
   ]
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