{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
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   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "+--------+-----+\n",
      "|    word|count|\n",
      "+--------+-----+\n",
      "|     rat|    2|\n",
      "|     cat|    2|\n",
      "|elephant|    1|\n",
      "+--------+-----+\n",
      "\n",
      "(0, array([-0.07621384], dtype=float32), array([ 0.56465578], dtype=float32))\n",
      "(20, array([ 0.04050734], dtype=float32), array([ 0.33296335], dtype=float32))\n",
      "(40, array([ 0.0856716], dtype=float32), array([ 0.30793899], dtype=float32))\n",
      "(60, array([ 0.09654912], dtype=float32), array([ 0.30191207], dtype=float32))\n",
      "(80, array([ 0.09916888], dtype=float32), array([ 0.30046052], dtype=float32))\n",
      "(100, array([ 0.09979983], dtype=float32), array([ 0.30011091], dtype=float32))\n",
      "(120, array([ 0.0999518], dtype=float32), array([ 0.30002671], dtype=float32))\n",
      "(140, array([ 0.09998839], dtype=float32), array([ 0.30000645], dtype=float32))\n",
      "(160, array([ 0.0999972], dtype=float32), array([ 0.30000156], dtype=float32))\n",
      "(180, array([ 0.09999932], dtype=float32), array([ 0.30000037], dtype=float32))\n",
      "(200, array([ 0.09999985], dtype=float32), array([ 0.3000001], dtype=float32))\n"
     ]
    }
   ],
   "source": [
    "import urllib2   \n",
    "import tensorflow as tf  \n",
    "import numpy as np  \n",
    "import findspark \n",
    "from sklearn import linear_model\n",
    " \n",
    "findspark.init()  \n",
    "from pyspark import SparkContext, SparkFiles, SQLContext\n",
    " \n",
    "if not 'sc' in locals():  \n",
    "    sc = SparkContext()  \n",
    " \n",
    "if not 'sqlContext' in locals():\n",
    " sqlContext = SQLContext(sc)\n",
    " \n",
    "wordsDF = sqlContext.createDataFrame([('cat',), ('elephant',), ('rat',), ('rat',), ('cat', )], ['word'])   \n",
    "wordCountsDF = wordsDF.groupBy(\"word\").count()   \n",
    "wordCountsDF.show() \n",
    " \n",
    "x_data = np.random.rand(100).astype(np.float32)  \n",
    "y_data = x_data * 0.1 + 0.3  \n",
    " \n",
    "W = tf.Variable(tf.random_uniform([1], -1.0, 1.0))  \n",
    "b = tf.Variable(tf.zeros([1]))  \n",
    "y = W * x_data + b  \n",
    " \n",
    "loss = tf.reduce_mean(tf.square(y - y_data))  \n",
    "optimizer = tf.train.GradientDescentOptimizer(0.5)  \n",
    "train = optimizer.minimize(loss)  \n",
    " \n",
    "init = tf.initialize_all_variables()  \n",
    " \n",
    "sess = tf.Session()  \n",
    "sess.run(init)  \n",
    " \n",
    "for step in range(201):  \n",
    "    sess.run(train)  \n",
    "    if step % 20 == 0:  \n",
    "        print(step, sess.run(W), sess.run(b))  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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