basics/lists.ipynb

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   "source": [
    "# Lists in Python \n",
    "\n",
    "Python list is an ordered sequence of items. We can store more than one   \n",
    "item of different types in a list. Items in the list are accessed using the index. "
   ]
  },
  {
   "cell_type": "markdown",
   "id": "dc5b9db7-4faf-4d28-8c47-33caeb2eeadc",
   "metadata": {},
   "source": [
    "→ Make a list"
   ]
  },
  {
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   "execution_count": 31,
   "id": "9e9e111a-ac06-418a-a7a4-3b0ebd098661",
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   "source": [
    "numbers = [1, 2, 3]\n",
    "\n",
    "fruits = ['apple', 'banana']\n",
    "\n",
    "mix_list = [3, 'python', 97, 2.1]"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "e9714606-2aa8-43bb-8857-e499c0bf6efb",
   "metadata": {},
   "source": [
    "→ Access first item"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "b69e66cc-4994-4a12-931f-13946f040ac9",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1"
      ]
     },
     "execution_count": 2,
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     "output_type": "execute_result"
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   ],
   "source": [
    "numbers[0]"
   ]
  },
  {
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   "id": "db1f0c1a-bdd9-4c7e-993e-cbafb2f27e2f",
   "metadata": {},
   "source": [
    "→ Access last item"
   ]
  },
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   "execution_count": 3,
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   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "5"
      ]
     },
     "execution_count": 3,
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   ],
   "source": [
    "numbers[-1]"
   ]
  },
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   "metadata": {},
   "source": [
    "### ✨ Get the index of the item  \n",
    "returns the index of the given item"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "d3c61754-003b-43c5-aef9-18e775c00d88",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "numbers.index(4)"
   ]
  },
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   "source": [
    "### 🟡 Add items using append\n",
    "\n",
    "`append` method add the items at the end of the list as   \n",
    "single item"
   ]
  },
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   "execution_count": 5,
   "id": "17e90215-9029-4935-8f8f-244845bdd568",
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   "source": [
    "numbers.append(10)\n",
    "numbers.append([1,2,3])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "fedca2e1-f85a-4d85-8bed-851c6d15e129",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 2, 3, 4, 5, 10, [1, 2, 3]]"
      ]
     },
     "execution_count": 6,
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    }
   ],
   "source": [
    "numbers"
   ]
  },
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   "cell_type": "markdown",
   "id": "f18ddf12-53f6-435a-8e73-ee539f02830e",
   "metadata": {},
   "source": [
    "🟡 Follow me @itsafiz "
   ]
  },
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   "source": [
    "### ✨ extend method  \n",
    "extend method adds all the elements of an iterable(string, list, tuple) to the end of the list "
   ]
  },
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   "execution_count": 7,
   "id": "26b40540-936e-4a7c-8813-e3cf9fbb94a7",
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   "outputs": [],
   "source": [
    "numbers.extend([1,2,3])"
   ]
  },
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   "execution_count": 8,
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   "outputs": [
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      "text/plain": [
       "[1, 2, 3, 4, 5, 10, [1, 2, 3], 1, 2, 3]"
      ]
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   "source": [
    "### ✨ insert method\n",
    "\n",
    "insert method inserts the item/items at the given index. \n"
   ]
  },
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   "execution_count": 9,
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   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 2, 99, 3, 4, 5, 10, [1, 2, 3], 1, 2, 3]"
      ]
     },
     "execution_count": 9,
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   "source": [
    "numbers.insert(2,99)\n",
    "numbers"
   ]
  },
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   "source": [
    "### ✨ remove method\n",
    "\n",
    "remove method deletes the first matching item from the list"
   ]
  },
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   "execution_count": 10,
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   "source": [
    "numbers.remove(99)"
   ]
  },
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   "execution_count": 11,
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    {
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      "text/plain": [
       "[1, 2, 3, 4, 5, 10, [1, 2, 3], 1, 2, 3]"
      ]
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     "execution_count": 11,
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   "source": [
    "numbers"
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   "execution_count": 12,
   "id": "2e39930b-85b5-4a7c-b6ac-fa1b24964244",
   "metadata": {},
   "outputs": [],
   "source": [
    "numbers.remove([1,2,3])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "e25ebe8c-fddf-4336-b1a1-5c894cf0e3d6",
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    {
     "data": {
      "text/plain": [
       "[1, 2, 3, 4, 5, 10, 1, 2, 3]"
      ]
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     "execution_count": 13,
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   "source": [
    "### ✨ Count method\n",
    "\n",
    "The `count()` method returns the number of times the given element appears in the list"
   ]
  },
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   "cell_type": "code",
   "execution_count": 14,
   "id": "e77beb93-83d9-488a-be65-1273a9156795",
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 14,
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   ],
   "source": [
    "numbers.count(2)"
   ]
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   "execution_count": 15,
   "id": "8178a924-65f1-4b77-b253-f0c340ddecbb",
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    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 15,
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   "source": [
    "numbers.count(3)"
   ]
  },
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   "source": [
    "### ✨ pop method\n",
    "\n",
    "`pop()` method deletes the element from the given index"
   ]
  },
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   "execution_count": 16,
   "id": "3569cd48-7250-4e4b-9f43-55494349a28f",
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 2, 3, 4, 5, 10, 1, 2, 3]"
      ]
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     "execution_count": 16,
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   "execution_count": 17,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "10"
      ]
     },
     "execution_count": 17,
     "metadata": {},
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   ],
   "source": [
    "numbers.pop(5)"
   ]
  },
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   "execution_count": 18,
   "id": "e6f8426f-d62c-4d90-bcd9-947899159fa0",
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 2, 3, 4, 5, 1, 2, 3]"
      ]
     },
     "execution_count": 18,
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   "source": [
    "### ✨ sorting list itmes\n",
    "\n",
    "`sort()` method is used to sort the items in the list"
   ]
  },
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   "execution_count": 19,
   "id": "4906bc1f-9de9-4cee-a658-f753563d7154",
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 2, 3, 4, 5, 1, 2, 3]"
      ]
     },
     "execution_count": 19,
     "metadata": {},
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   ],
   "source": [
    "numbers"
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  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "bd74d498-9723-4c56-952a-2eb1c5c8c12f",
   "metadata": {},
   "outputs": [],
   "source": [
    "numbers.sort()"
   ]
  },
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   "cell_type": "code",
   "execution_count": 21,
   "id": "af9f440c-c4cd-4743-9934-6e1f8949effc",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 1, 2, 2, 3, 3, 4, 5]"
      ]
     },
     "execution_count": 21,
     "metadata": {},
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    }
   ],
   "source": [
    "numbers"
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   "execution_count": 24,
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   "source": [
    "numbers.sort(reverse=True) # descending order"
   ]
  },
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   "execution_count": 25,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "[5, 4, 3, 3, 2, 2, 1, 1]"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
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    "numbers"
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   "source": [
    "### ✨ reverse list itmes\n",
    "\n",
    "`reverse()` method is used to reverse the items in the list"
   ]
  },
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   "execution_count": 26,
   "id": "26ffb184-ee7e-4dcd-ac18-10050e1a8bcd",
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "[5, 4, 3, 3, 2, 2, 1, 1]"
      ]
     },
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   "id": "69aa331c-1b8f-409d-bb47-c36c188254c3",
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 1, 2, 2, 3, 3, 4, 5]"
      ]
     },
     "execution_count": 27,
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   ],
   "source": [
    "numbers.reverse()\n",
    "numbers"
   ]
  },
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   "source": [
    "### ✨ delete all the list itmes\n",
    "\n",
    "`clear()` method is used to delete all the items in the list"
   ]
  },
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   "execution_count": 28,
   "id": "dcc1ef88-442b-4229-be64-2de12a853332",
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    {
     "data": {
      "text/plain": [
       "[1, 1, 2, 2, 3, 3, 4, 5]"
      ]
     },
     "execution_count": 28,
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   "id": "e62511c5-fa8e-4aae-adef-0e356b6be213",
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   "outputs": [],
   "source": [
    "numbers.clear()"
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   "metadata": {},
   "source": [
    "# Lists in Python"
   ]
  },
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   "id": "a540733c-df9f-4bec-9ec4-c6322f9ad329",
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