reduceby-scratchpad.ipynb

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     "text": [
      "raw\n",
      "[{'date': '20160101', 'bookmarks': 0, 'reading': 0, 'intent': 1, 'clientid': 'aaa'}, {'date': '20160101', 'bookmarks': 1, 'reading': 0, 'intent': 1, 'clientid': 'aaa'}, {'date': '20160101', 'bookmarks': 2, 'reading': 1, 'intent': 0, 'clientid': 'aaa'}, {'date': '20160102', 'bookmarks': 0, 'reading': 0, 'intent': 1, 'clientid': 'aaa'}, {'date': '20160102', 'bookmarks': 0, 'reading': 1, 'intent': 1, 'clientid': 'aaa'}, {'date': '20160102', 'bookmarks': 0, 'reading': 0, 'intent': 1, 'clientid': 'aaa'}]\n",
      "mapped\n",
      "[('aaa|20160101', {'bookmarks': 0, 'reading': 0, 'intent': 1}), ('aaa|20160101', {'bookmarks': 1, 'reading': 0, 'intent': 1}), ('aaa|20160101', {'bookmarks': 2, 'reading': 1, 'intent': 0}), ('aaa|20160102', {'bookmarks': 0, 'reading': 0, 'intent': 1}), ('aaa|20160102', {'bookmarks': 0, 'reading': 1, 'intent': 1}), ('aaa|20160102', {'bookmarks': 0, 'reading': 0, 'intent': 1})]\n",
      "agged\n",
      "[('aaa|20160102', {'bookmarks': 0, 'reading': 1, 'intent': 3}), ('aaa|20160101', {'bookmarks': 3, 'reading': 1, 'intent': 2})]\n"
     ]
    }
   ],
   "source": [
    "def keyify(ping):\n",
    "    client = ping.pop(\"clientid\", None)\n",
    "    date = ping.pop(\"date\", None)\n",
    "    return (client + \"|\" + date, ping)\n",
    "\n",
    "def aggregate(agg1, agg2):\n",
    "    for metric, values in agg2.iteritems():\n",
    "        if metric not in agg1:\n",
    "            agg1[metric] = values\n",
    "            continue\n",
    "        else:\n",
    "            agg1[metric] += values\n",
    "\n",
    "    return agg1\n",
    "\n",
    "rawdata = [\n",
    "  { 'clientid': 'aaa', 'date': '20160101', 'bookmarks': 0, 'intent': 1, 'reading': 0 },\n",
    "  { 'clientid': 'aaa', 'date': '20160101', 'bookmarks': 1, 'intent': 1, 'reading': 0 },\n",
    "  { 'clientid': 'aaa', 'date': '20160101', 'bookmarks': 2, 'intent': 0, 'reading': 1 },\n",
    "  { 'clientid': 'aaa', 'date': '20160102', 'bookmarks': 0, 'intent': 1, 'reading': 0 },\n",
    "  { 'clientid': 'aaa', 'date': '20160102', 'bookmarks': 0, 'intent': 1, 'reading': 1 },\n",
    "  { 'clientid': 'aaa', 'date': '20160102', 'bookmarks': 0, 'intent': 1, 'reading': 0 }\n",
    "]\n",
    "\n",
    "print \"raw\"\n",
    "print rawdata\n",
    "\n",
    "dataset = sc.parallelize(rawdata)\n",
    "\n",
    "mapped = dataset.map(keyify)\n",
    "print \"mapped\"\n",
    "print mapped.take(6)\n",
    "\n",
    "agged = mapped.reduceByKey(aggregate)\n",
    "print \"agged\"\n",
    "print agged.take(6)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "raw\n",
      "[('aaa,20160101,intent', 1), ('aaa,20160101,bookmark', 1), ('aaa,20160101,intent', 1), ('aaa,20160101,reading', 1), ('aaa,20160101,bookmark', 2), ('aaa,20160102,intent', 1), ('aaa,20160102,reading', 1), ('aaa,20160102,intent', 0), ('aaa,20160102,reading', 1), ('aaa,20160102,intent', 1), ('aaa,20160102,bookmark', 1)]\n",
      "agged\n",
      "[('aaa,20160101,bookmark', 3), ('aaa,20160101,intent', 2), ('aaa,20160102,reading', 2), ('aaa,20160102,intent', 2), ('aaa,20160101,reading', 1), ('aaa,20160102,bookmark', 1)]\n"
     ]
    }
   ],
   "source": [
    "otherraw = [\n",
    "    ('aaa,20160101,intent', 1),\n",
    "    ('aaa,20160101,bookmark', 1),\n",
    "    ('aaa,20160101,intent', 1),\n",
    "    ('aaa,20160101,reading', 1),\n",
    "    ('aaa,20160101,bookmark', 2),\n",
    "    ('aaa,20160102,intent', 1),\n",
    "    ('aaa,20160102,reading', 1),\n",
    "    ('aaa,20160102,intent', 0),\n",
    "    ('aaa,20160102,reading', 1),\n",
    "    ('aaa,20160102,intent', 1),\n",
    "    ('aaa,20160102,bookmark', 1)\n",
    "]\n",
    "\n",
    "print \"raw\"\n",
    "print otherraw\n",
    "\n",
    "otherraw = sc.parallelize(otherraw)\n",
    "\n",
    "otheragged = otherraw.reduceByKey(lambda x, y: x + y)\n",
    "print \"agged\"\n",
    "print otheragged.take(10)\n"
   ]
  }
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sc.parallelize solves all ills!