Merge pull request #42 from turbomanage/master

init Spark context in case we had to restart Datalab

Author: lakshmanok

courses/unstructured/PySpark-Test-Solution.ipynb

@@ -1,5 +1,19 @@
 {
  "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "from pyspark import SparkContext\n",
+    "\n",
+    "if 'sc' not in locals():\n",
+    "  sc = SparkContext(\"local\")"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 18,