honore-beaugrand/homework - solution.ipynb

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 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "First, we need to load the [cheshire](https://github.com/dakrone/cheshire) module to load json."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "(require '[cheshire.core :as cheshire])"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Second, we define a variable that points to the url we wished to download"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "#'user/election-results-url"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "(def election-results-url \"https://dgeq.org/doc/gen7-4-2014/resultats.json\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Then, we download the content of the url as a \"string\".  See the [slurp](https://clojuredocs.org/clojure.core/slurp) function to see how it works."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "#'user/raw-data"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "(def raw-data (slurp election-results-url))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Now, let's print some information about the downloaded string...\n",
    "\n",
    "We can use [subs](https://clojuredocs.org/clojure.core/subs) for that"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "the length of the string is... 193056\n",
      "the string starts with... {\"statistiques\":{\"partisPolitiques\":[{\"numeroParti\n"
     ]
    }
   ],
   "source": [
    "(println \"the length of the string is...\" (count raw-data))\n",
    "(println \"the string starts with...\" (subs raw-data 0 50))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We can now use cheshire to load the data.  The `parse-string` functions looks awesome to do that."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "#'user/data"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "(def data (cheshire/parse-string raw-data true))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We can now explore the real data structure.."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "the data structure type is...  clojure.lang.PersistentArrayMap\n",
      "the keys are...  (:statistiques :circonscriptions)\n"
     ]
    }
   ],
   "source": [
    "(println \"the data structure type is... \" (type data))\n",
    "(println \"the keys are... \" (keys data))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We can now use the clojure inverse of `slurp`, the [spit](https://clojuredocs.org/clojure.core/spit) function, to serialize the data to a file.  The file should be named `resources/data/election-2014.edn`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [],
   "source": [
    "(spit \"resources/data/election-2014.edn\" (str data))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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