{
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  {
   "cell_type": "markdown",
   "id": "b542bcd7",
   "metadata": {},
   "source": [
    "## Counter"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "04f25a1d",
   "metadata": {},
   "outputs": [],
   "source": [
    "from collections import Counter"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "8ca6aa1a",
   "metadata": {},
   "source": [
    "### Logic"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "81ebbf83",
   "metadata": {},
   "source": [
    "- Counter(pass any iterable here)\n",
    "    - It will give dictionary of keys(elements) and values(count)\n",
    "        - Accessing the count:\n",
    "            - Since it returns dict,you can use counter.keys(),counter.values() and counter.items()\n",
    "            - or if you want count of specific key,you can do counter()['that key']"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2393dba7",
   "metadata": {},
   "source": [
    "### Example"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "id": "220861d8",
   "metadata": {},
   "outputs": [],
   "source": [
    "l=[1,2,3,3,4,5,5,5,5,5,5,5,5,5,5]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "id": "cd9c9ed7",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "dict_keys([1, 2, 3, 4, 5])\n",
      "dict_values([1, 1, 2, 1, 10])\n",
      "dict_items([(1, 1), (2, 1), (3, 2), (4, 1), (5, 10)])\n"
     ]
    }
   ],
   "source": [
    "print(Counter(l).keys())\n",
    "print(Counter(l).values())\n",
    "print(Counter(l).items())"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d5dd3db8",
   "metadata": {},
   "source": [
    "### Counting in lists"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "8508bd97",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Counter({1: 1, 2: 1, 3: 2, 4: 1, 5: 10})"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "l=[1,2,3,3,4,5,5,5,5,5,5,5,5,5,5]\n",
    "Counter(l)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "64167bc7",
   "metadata": {},
   "source": [
    "### Counting in String"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "e3d0a941",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Counter({'s': 2, 'a': 2, 'h': 2, 'i': 2, 'l': 2})"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s='sahilsahil'\n",
    "Counter(s)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "61161e13",
   "metadata": {},
   "source": [
    "### Counting in dictionary"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "4ba0820e",
   "metadata": {},
   "outputs": [],
   "source": [
    "d={\n",
    "    'a':10,\n",
    "    'b':20,\n",
    "    'c':40\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "id": "159d3512",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Counter({'a': 10, 'b': 20, 'c': 40})"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Counter(d)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "c2edcb1d",
   "metadata": {},
   "source": [
    "### Getting count of specific element"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "id": "2f1095b0",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "40"
      ]
     },
     "execution_count": 29,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Counter(d)['c']"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "c1ed8d48",
   "metadata": {},
   "source": [
    "### Extra Functions we can use on Counter object"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "id": "2935940e",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[(6, 5)]\n",
      "[(6, 5), (2, 2)]\n"
     ]
    }
   ],
   "source": [
    "l=[1,2,2,3,4,4,5,6,6,6,6,6]\n",
    "print(Counter(l).most_common(1)) # highest occurence(count)\n",
    "print(Counter(l).most_common(2)) # top 2 based on occurence(count)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7765ba86",
   "metadata": {},
   "source": [
    "### More"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "a4754400",
   "metadata": {},
   "source": [
    "- Since it gives dict object,we can use all the dict operations and perform conditions and everything"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "id": "6336976c",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[6]"
      ]
     },
     "execution_count": 38,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "[k for k,v in Counter(l).items() if v==5]"
   ]
  }
 ],
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