Create query_cellar_python.ipynb

Author: duprijil

notebooks/query_cellar_python.ipynb

@@ -0,0 +1,143 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "source": [
+    "## This example show how to query sparql endpoint using Python.\n",
+    "### To run this, press \"Run all\" button, or Ctrl+Shift+Alt+Enter"
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 35,
+   "outputs": [],
+   "source": [
+    "# Uncomment last line of this cell (by deleting #) to install necessary dependencies.\n",
+    "\n",
+    "#!pip install sparqlwrapper pandas"
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 36,
+   "outputs": [],
+   "source": [
+    "# Import dependencies\n",
+    "from io import StringIO\n",
+    "from SPARQLWrapper import SPARQLWrapper, CSV\n",
+    "from pandas import read_csv\n",
+    "\n",
+    "# Prepare variable with sparql endpoint\n",
+    "QUERY_ENDPOINT: str = 'https://publications.europa.eu/webapi/rdf/sparql'\n",
+    "\n",
+    "# Example of sparql query\n",
+    "SPARQL_QUERY: str = \"\"\"\n",
+    "prefix cdm: <http://publications.europa.eu/ontology/cdm#>\n",
+    "select distinct ?Countries\n",
+    "where {\n",
+    "?Countries a cdm:country\n",
+    "}\n",
+    "\"\"\""
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 37,
+   "outputs": [],
+   "source": [
+    "# Prepare connection to sparql endpoint\n",
+    "sparql_endpoint = SPARQLWrapper(QUERY_ENDPOINT)\n",
+    "sparql_endpoint.setQuery(SPARQL_QUERY)\n",
+    "sparql_endpoint.setReturnFormat(CSV)"
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 38,
+   "outputs": [],
+   "source": [
+    "# Request for query\n",
+    "endpoint_result = sparql_endpoint.query().convert()\n",
+    "# Convert endpoint result to table (dataframe)\n",
+    "result_data = StringIO(str(endpoint_result, 'utf-8'))\n",
+    "result_dataframe = read_csv(result_data)"
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 42,
+   "outputs": [
+    {
+     "data": {
+      "text/plain": "                                             Countries\n0    http://publications.europa.eu/resource/authori...\n1    http://publications.europa.eu/resource/authori...\n2    http://publications.europa.eu/resource/authori...\n3    http://publications.europa.eu/resource/authori...\n4    http://publications.europa.eu/resource/authori...\n..                                                 ...\n215  http://publications.europa.eu/resource/authori...\n216  http://publications.europa.eu/resource/authori...\n217  http://publications.europa.eu/resource/authori...\n218  http://publications.europa.eu/resource/authori...\n219  http://publications.europa.eu/resource/authori...\n\n[220 rows x 1 columns]",
+      "text/html": "<div>\n<style scoped>\n    .dataframe tbody tr th:only-of-type {\n        vertical-align: middle;\n    }\n\n    .dataframe tbody tr th {\n        vertical-align: top;\n    }\n\n    .dataframe thead th {\n        text-align: right;\n    }\n</style>\n<table border=\"1\" class=\"dataframe\">\n  <thead>\n    <tr style=\"text-align: right;\">\n      <th></th>\n      <th>Countries</th>\n    </tr>\n  </thead>\n  <tbody>\n    <tr>\n      <th>0</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>1</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>2</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>3</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>4</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>...</th>\n      <td>...</td>\n    </tr>\n    <tr>\n      <th>215</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>216</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>217</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>218</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n    <tr>\n      <th>219</th>\n      <td>http://publications.europa.eu/resource/authori...</td>\n    </tr>\n  </tbody>\n</table>\n<p>220 rows × 1 columns</p>\n</div>"
+     },
+     "execution_count": 42,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Print result\n",
+    "result_dataframe"
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}