{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 1\n",
    "Dicts are unordered. So the \"sensor-B\" dictionary may appear before the \"senor-A\" dictionary when printed."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'sensor-A': [192, 4, 1, 54], 'sensor-B': [228, 147, 61, 84]}\n",
      "{'sensor-A': [33], 'sensor-B': [48, 41, 910]}\n",
      "{'sensor-A': [292, 12, 84, 991], 'sensor-B': [28901]}\n"
     ]
    }
   ],
   "source": [
    "chz_dict = {\"sensor-A\": [192, 4, 1, 54], \"sensor-B\": [228, 147, 61, 84]}\n",
    "rxj_dict = {\"sensor-A\": [33], \"sensor-B\": [48, 41, 910]}\n",
    "amp_dict = {\"sensor-A\": [292, 12, 84, 991], \"sensor-B\": [28901]}\n",
    "print(chz_dict)\n",
    "print(rxj_dict)\n",
    "print(amp_dict)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 2 and 3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'sensor-A': [33, 55, 21], 'sensor-B': [48, 41, 910]}\n",
      "{'sensor-A': [292, 12, 94, 991], 'sensor-B': [28901]}\n"
     ]
    }
   ],
   "source": [
    "rxj_dict[\"sensor-A\"] += [55, 21];\n",
    "print(rxj_dict)\n",
    "amp_dict[\"sensor-A\"][2] = 94;\n",
    "print(amp_dict)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 4"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 55,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'AMP': {'sensor-A': [292, 12, 94, 991], 'sensor-B': [28901]},\n",
       " 'CHZ': {'sensor-A': [192, 4, 1, 54], 'sensor-B': [228, 147, 71, 94]},\n",
       " 'RXJ': {'sensor-A': [33, 55, 21], 'sensor-B': [48, 41, 910]}}"
      ]
     },
     "execution_count": 55,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dut_dict = {}\n",
    "dut_dict[\"CHZ\"] = chz_dict\n",
    "dut_dict[\"RXJ\"] = rxj_dict\n",
    "dut_dict[\"AMP\"] = amp_dict\n",
    "dut_dict"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 5\n",
    "Note that the dictionary just points to the chz_dict object which contains the list object to be changed. No data copying occurred."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 56,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'AMP': {'sensor-A': [292, 12, 94, 991], 'sensor-B': [28901]},\n",
       " 'CHZ': {'sensor-A': [192, 4, 1, 54], 'sensor-B': [228, 147, 71, 94]},\n",
       " 'RXJ': {'sensor-A': [33, 55, 21], 'sensor-B': [48, 41, 910]}}"
      ]
     },
     "execution_count": 56,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dut_dict[\"CHZ\"][\"sensor-B\"][2:4] = [71,94]\n",
    "dut_dict"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 6\n",
    "As usual there are a couple of ways to do this.\n",
    "Standard loops in loops"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 75,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "28901\n",
      "1\n",
      "32189\n",
      "19\n"
     ]
    }
   ],
   "source": [
    "dict_list = []\n",
    "for dut in dut_dict.values() :\n",
    "    for other_it in (list(dut.values())) : \n",
    "        dict_list += other_it\n",
    "print (max(dict_list))\n",
    "print (min(dict_list))\n",
    "print (sum(dict_list))\n",
    "print (len(dict_list))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Or using fancy pants comprehensions"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 89,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "28901\n",
      "1\n",
      "32189\n",
      "19\n"
     ]
    }
   ],
   "source": [
    "all_samples = [sample for sensors in dut_dict.values() for samples in sensors.values() for sample in samples]\n",
    "print (max(all_samples))\n",
    "print (min(all_samples))\n",
    "print (sum(all_samples))\n",
    "print (len(all_samples))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 7\n",
    "Dicts can be trickier to work with when working with the values and not the keys. It's easier to check the list from 6 (yes its cheating)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 73,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'AMP': {'sensor-A': [292, 12, 94, 991], 'sensor-B': [28901]},\n",
       " 'CHZ': {'sensor-A': [192, 4, 1, 54], 'sensor-B': [228, 147, 71, 94]},\n",
       " 'RXJ': {'sensor-A': [33, 55, 21], 'sensor-B': [48, 41, 910]}}"
      ]
     },
     "execution_count": 73,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dut_dict"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 94,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n",
      "True\n"
     ]
    }
   ],
   "source": [
    "found = False\n",
    "all_samples = [sample for sensors in dut_dict.values() for samples in sensors.values() for sample in samples]\n",
    "found = 71 in all_samples\n",
    "print (found)\n",
    "\n",
    "found = False\n",
    "for sensors in dut_dict.values() :\n",
    "    for samples in sensors.values() :         \n",
    "        found = found or 71 in samples\n",
    "print (found)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 8"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 95,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n",
      "True\n"
     ]
    }
   ],
   "source": [
    "found = False\n",
    "all_samples = [sample for sensors in dut_dict.values() for samples in sensors.values() for sample in samples]\n",
    "found = 60 not in dict_list\n",
    "print (found)\n",
    "\n",
    "found = False\n",
    "for sensors in dut_dict.values() :\n",
    "    for samples in sensors.values() : \n",
    "        found = found or 60 not in samples\n",
    "print (found)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 9"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 98,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "1\n"
     ]
    }
   ],
   "source": [
    "count = 0\n",
    "all_samples = [sample for sensors in dut_dict.values() for samples in sensors.values() for sample in samples]\n",
    "count = all_samples.count(228)\n",
    "print (count)\n",
    "\n",
    "count = 0\n",
    "dict_list = []\n",
    "for sensors in dut_dict.values() :\n",
    "    for samples in sensors.values() : \n",
    "        count += samples.count(228)\n",
    "print (count)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 10\n",
    "Note again the underlying lists are changed not copies in the dictionary"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 103,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'AMP': {'sensor-A': [12, 94, 292, 991], 'sensor-B': [28901]},\n",
       " 'CHZ': {'sensor-A': [1, 4, 54, 192], 'sensor-B': [71, 94, 147, 228]},\n",
       " 'RXJ': {'sensor-A': [21, 33, 55], 'sensor-B': [41, 48, 910]}}"
      ]
     },
     "execution_count": 103,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "for sensors in dut_dict.values() :\n",
    "    for samples in sensors.values() : \n",
    "        # Remember the value of the inner dict is a list so indexing and list functions are OK!\n",
    "        samples.sort()\n",
    "dut_dict"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 11\n",
    "Easy peasy lemon squeezy. Not that there's no point inserting at the beginning or end. Dicts are unordered and its up to the compiler to do it "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 106,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'AMP': {'sensor-A': [12, 94, 292, 991], 'sensor-B': [28901]},\n",
       " 'BMX': {'sensor-A': [1, 4, 6, 735], 'sensor-B': [12, 135, 2462]},\n",
       " 'CHZ': {'sensor-A': [1, 4, 54, 192], 'sensor-B': [71, 94, 147, 228]},\n",
       " 'QRT': {'sensor-A': [2, 31, 52, 85], 'sensor-B': [899, 900, 901]},\n",
       " 'RXJ': {'sensor-A': [21, 33, 55], 'sensor-B': [41, 48, 910]}}"
      ]
     },
     "execution_count": 106,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dut_dict[\"BMX\"] = {\"sensor-A\": [1, 4, 6, 735], \"sensor-B\": [12, 135, 2462]}\n",
    "dut_dict[\"QRT\"] = {\"sensor-A\": [2, 31, 52, 85], \"sensor-B\": [899, 900, 901]}\n",
    "dut_dict"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 12"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 107,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'BMX': {'sensor-A': [1, 4, 6, 735], 'sensor-B': [12, 135, 2462]},\n",
       " 'CHZ': {'sensor-A': [1, 4, 54, 192], 'sensor-B': [71, 94, 147, 228]},\n",
       " 'QRT': {'sensor-A': [2, 31, 52, 85], 'sensor-B': [899, 900, 901]},\n",
       " 'RXJ': {'sensor-A': [21, 33, 55], 'sensor-B': [41, 48, 910]}}"
      ]
     },
     "execution_count": 107,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dut_dict.pop(\"AMP\")\n",
    "dut_dict"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Answer 13\n",
    "This is just a call to dict.keys(). Handy for iterating (except dicts already have a built-in iterator). NOTE that dict.keys() returns an ITERATOR. The list constructor can use the iterator to produce an actual list."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 111,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "dict_keys(['QRT', 'RXJ', 'CHZ', 'BMX'])\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "['QRT', 'RXJ', 'CHZ', 'BMX']"
      ]
     },
     "execution_count": 111,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "print(dut_dict.keys())\n",
    "list(dut_dict.keys())"
   ]
  }
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