search.ipynb

       "\n",
       "        <span class=\"k\">return</span> <span class=\"n\">num_conflicts</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>\n"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "psource(NQueensProblem)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "In [`csp.ipynb`](https://github.com/aimacode/aima-python/blob/master/csp.ipynb) we have seen that the N-Queens problem can be formulated as a CSP and can be solved by \n",
    "the `min_conflicts` algorithm in a way similar to Hill-Climbing. \n",
    "Here, we want to solve it using heuristic search algorithms and even some classical search algorithms.\n",
    "The `NQueensProblem` class derives from the `Problem` class and is implemented in such a way that the search algorithms we already have, can solve it.\n",
    "<br>\n",
    "Let's instantiate the class."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 81,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "nqp = NQueensProblem(8)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's use `depth_first_tree_search` first.\n",
    "<br>\n",
    "We will also use the %%timeit magic with each algorithm to see how much time they take."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 82,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "4.82 ms ± 498 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)\n"
     ]
    }
   ],
   "source": [
    "%%timeit\n",
    "depth_first_tree_search(nqp)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 83,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "dfts = depth_first_tree_search(nqp).solution()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 84,
   "metadata": {},
   "outputs": [
    {
     "data": {
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6Jd7zrw7773+vnq+v8k8AAGgKAnaLmbZo4PWujZWBNmyY+8NXe88TLgtOU51X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\nAElFTkSuQmCC\n",
      "text/plain": [
       "<matplotlib.figure.Figure at 0x2871fddf550>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "plot_NQueens(dfts)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`breadth_first_tree_search`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 85,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "88.6 ms ± 2.01 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)\n"
     ]
    }
   ],
   "source": [
    "%%timeit\n",
    "breadth_first_tree_search(nqp)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 86,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "bfts = breadth_first_tree_search(nqp).solution()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 87,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "image/png": 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dUF8960XABgBkR5Mzrl8Pmav2ymve85HjwWnC9kXSRP0J2ACAXJk/K3jf5PnB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\n/P+uMuaa/akHvAAAAABJRU5ErkJggg==\n",
      "text/plain": [
       "<matplotlib.figure.Figure at 0x2871fde6898>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "plot_NQueens(bfts)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`uniform_cost_search`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 88,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1.08 s ± 154 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)\n"
     ]
    }
   ],
   "source": [
    "%%timeit\n",
    "uniform_cost_search(nqp)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 89,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "ucs = uniform_cost_search(nqp).solution()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 90,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "image/png": 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dUF8960XABgBkR5Mzrl8Pmav2ymve85HjwWnC9kXSRP0J2ACAXJk/K3jf5PnB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\n/xeSgoPxvrLR8lnTB+8P6jm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      "text/plain": [
       "<matplotlib.figure.Figure at 0x2871f6c04e0>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "plot_NQueens(ucs)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`depth_first_tree_search` is almost 20 times faster than `breadth_first_tree_search` and more than 200 times faster than `uniform_cost_search`."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "We can also solve this problem using `astar_search` with a suitable heuristic function. \n",
    "<br>\n",
    "The best heuristic function for this scenario will be one that returns the number of conflicts in the current state."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 91,
   "metadata": {},
   "outputs": [
    {
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       "body .mi { color: #666666 } /* Literal.Number.Integer */\n",
       "body .mo { color: #666666 } /* Literal.Number.Oct */\n",
       "body .sa { color: #BA2121 } /* Literal.String.Affix */\n",
       "body .sb { color: #BA2121 } /* Literal.String.Backtick */\n",
       "body .sc { color: #BA2121 } /* Literal.String.Char */\n",
       "body .dl { color: #BA2121 } /* Literal.String.Delimiter */\n",
       "body .sd { color: #BA2121; font-style: italic } /* Literal.String.Doc */\n",
       "body .s2 { color: #BA2121 } /* Literal.String.Double */\n",
       "body .se { color: #BB6622; font-weight: bold } /* Literal.String.Escape */\n",
       "body .sh { color: #BA2121 } /* Literal.String.Heredoc */\n",
       "body .si { color: #BB6688; font-weight: bold } /* Literal.String.Interpol */\n",
       "body .sx { color: #008000 } /* Literal.String.Other */\n",
       "body .sr { color: #BB6688 } /* Literal.String.Regex */\n",
       "body .s1 { color: #BA2121 } /* Literal.String.Single */\n",
       "body .ss { color: #19177C } /* Literal.String.Symbol */\n",
       "body .bp { color: #008000 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0000FF } /* Name.Function.Magic */\n",
       "body .vc { color: #19177C } /* Name.Variable.Class */\n",
       "body .vg { color: #19177C } /* Name.Variable.Global */\n",
       "body .vi { color: #19177C } /* Name.Variable.Instance */\n",
       "body .vm { color: #19177C } /* Name.Variable.Magic */\n",
       "body .il { color: #666666 } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span>    <span class=\"k\">def</span> <span class=\"nf\">h</span><span class=\"p\">(</span><span class=\"bp\">self</span><span class=\"p\">,</span> <span class=\"n\">node</span><span class=\"p\">):</span>\n",
       "        <span class=\"sd\">&quot;&quot;&quot;Return number of conflicting queens for a given node&quot;&quot;&quot;</span>\n",
       "        <span class=\"n\">num_conflicts</span> <span class=\"o\">=</span> <span class=\"mi\">0</span>\n",
       "        <span class=\"k\">for</span> <span class=\"p\">(</span><span class=\"n\">r1</span><span class=\"p\">,</span> <span class=\"n\">c1</span><span class=\"p\">)</span> <span class=\"ow\">in</span> <span class=\"nb\">enumerate</span><span class=\"p\">(</span><span class=\"n\">node</span><span class=\"o\">.</span><span class=\"n\">state</span><span class=\"p\">):</span>\n",
       "            <span class=\"k\">for</span> <span class=\"p\">(</span><span class=\"n\">r2</span><span class=\"p\">,</span> <span class=\"n\">c2</span><span class=\"p\">)</span> <span class=\"ow\">in</span> <span class=\"nb\">enumerate</span><span class=\"p\">(</span><span class=\"n\">node</span><span class=\"o\">.</span><span class=\"n\">state</span><span class=\"p\">):</span>\n",
       "                <span class=\"k\">if</span> <span class=\"p\">(</span><span class=\"n\">r1</span><span class=\"p\">,</span> <span class=\"n\">c1</span><span class=\"p\">)</span> <span class=\"o\">!=</span> <span class=\"p\">(</span><span class=\"n\">r2</span><span class=\"p\">,</span> <span class=\"n\">c2</span><span class=\"p\">):</span>\n",
       "                    <span class=\"n\">num_conflicts</span> <span class=\"o\">+=</span> <span class=\"bp\">self</span><span class=\"o\">.</span><span class=\"n\">conflict</span><span class=\"p\">(</span><span class=\"n\">r1</span><span class=\"p\">,</span> <span class=\"n\">c1</span><span class=\"p\">,</span> <span class=\"n\">r2</span><span class=\"p\">,</span> <span class=\"n\">c2</span><span class=\"p\">)</span>\n",
       "\n",
       "        <span class=\"k\">return</span> <span class=\"n\">num_conflicts</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>\n"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "psource(NQueensProblem.h)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 92,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "8.85 ms ± 424 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)\n"
     ]
    }
   ],
   "source": [
    "%%timeit\n",
    "astar_search(nqp)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "`astar_search` is faster than both `uniform_cost_search` and `breadth_first_tree_search`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 93,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "astar = astar_search(nqp).solution()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 94,
   "metadata": {},
   "outputs": [
    {
     "data": {
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GOACkhoDdZhbOCd43dWHwvijCet+LLmkubwBAsgjYKTm503/7Y+taW4+SR9b6b3/n2dbW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\nV6LVZ8VS6ZuboucLAMBQtVUP+44vec9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      "text/plain": [
       "<matplotlib.figure.Figure at 0x2871ff9f518>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "plot_NQueens(astar)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<br>\n",
    "This concludes the notebook.\n",
    "Hope you learned something new!"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
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    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.1"
  },
  "widgets": {
   "state": {
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      }
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    "17be64c89a9a4a43b3272cb018df0970": {
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 "nbformat": 4,
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}