diff --git a/your-code/main.ipynb b/your-code/main.ipynb
index f3bde01..c64953b 100644
--- a/your-code/main.ipynb
+++ b/your-code/main.ipynb
@@ -24,11 +24,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "id": "630d7e4d",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "import pandas as pd\n",
+    "import numpy as np\n",
+    "import math\n",
+    "import random\n",
+    "import os\n",
+    "import sys"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -41,10 +48,24 @@
    ]
   },
   {
-   "cell_type": "markdown",
-   "id": "1207cb2c",
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "bcf2a31d",
    "metadata": {},
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400]\n"
+     ]
+    }
+   ],
+   "source": [
+    "square = [i**2 for i in range(1, 21)]\n",
+    "\n",
+    "print(square)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -59,11 +80,147 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 7,
    "id": "c047115a",
+   "metadata": {
+    "scrolled": true
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[1.0, 1.4142135623730951, 1.7320508075688772, 2.0, 2.23606797749979, 2.449489742783178, 2.6457513110645907, 2.8284271247461903, 3.0, 3.1622776601683795, 3.3166247903554, 3.4641016151377544, 3.605551275463989, 3.7416573867739413, 3.872983346207417, 4.0, 4.123105625617661, 4.242640687119285, 4.358898943540674, 4.47213595499958, 4.58257569495584, 4.69041575982343, 4.795831523312719, 4.898979485566356, 5.0, 5.0990195135927845, 5.196152422706632, 5.291502622129181, 5.385164807134504, 5.477225575051661, 5.5677643628300215, 5.656854249492381, 5.744562646538029, 5.830951894845301, 5.916079783099616, 6.0, 6.082762530298219, 6.164414002968976, 6.244997998398398, 6.324555320336759, 6.4031242374328485, 6.48074069840786, 6.557438524302, 6.6332495807108, 6.708203932499369, 6.782329983125268, 6.855654600401044, 6.928203230275509, 7.0, 7.0710678118654755, 7.14142842854285, 7.211102550927978, 7.280109889280518, 7.3484692283495345, 7.416198487095663, 7.483314773547883, 7.54983443527075, 7.615773105863909, 7.681145747868608, 7.745966692414834, 7.810249675906654, 7.874007874011811, 7.937253933193772, 8.0, 8.06225774829855, 8.12403840463596, 8.18535277187245, 8.246211251235321, 8.306623862918075, 8.366600265340756, 8.426149773176359, 8.48528137423857, 8.54400374531753, 8.602325267042627, 8.660254037844387, 8.717797887081348, 8.774964387392123, 8.831760866327848, 8.888194417315589, 8.94427190999916, 9.0, 9.055385138137417, 9.1104335791443, 9.16515138991168, 9.219544457292887, 9.273618495495704, 9.327379053088816, 9.38083151964686, 9.433981132056603, 9.486832980505138, 9.539392014169456, 9.591663046625438, 9.643650760992955, 9.695359714832659, 9.746794344808963, 9.797958971132712, 9.848857801796104, 9.899494936611665, 9.9498743710662]\n"
+     ]
+    }
+   ],
+   "source": [
+    "sqrt = [x**0.5 for x in range(1,100)]\n",
+    "\n",
+    "print(sqrt)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "d5e22df4",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[1.0,\n",
+       " 1.4142135623730951,\n",
+       " 1.7320508075688772,\n",
+       " 2.0,\n",
+       " 2.23606797749979,\n",
+       " 2.449489742783178,\n",
+       " 2.6457513110645907,\n",
+       " 2.8284271247461903,\n",
+       " 3.0,\n",
+       " 3.1622776601683795,\n",
+       " 3.3166247903554,\n",
+       " 3.4641016151377544,\n",
+       " 3.605551275463989,\n",
+       " 3.7416573867739413,\n",
+       " 3.872983346207417,\n",
+       " 4.0,\n",
+       " 4.123105625617661,\n",
+       " 4.242640687119285,\n",
+       " 4.358898943540674,\n",
+       " 4.47213595499958,\n",
+       " 4.58257569495584,\n",
+       " 4.69041575982343,\n",
+       " 4.795831523312719,\n",
+       " 4.898979485566356,\n",
+       " 5.0,\n",
+       " 5.0990195135927845,\n",
+       " 5.196152422706632,\n",
+       " 5.291502622129181,\n",
+       " 5.385164807134504,\n",
+       " 5.477225575051661,\n",
+       " 5.5677643628300215,\n",
+       " 5.656854249492381,\n",
+       " 5.744562646538029,\n",
+       " 5.830951894845301,\n",
+       " 5.916079783099616,\n",
+       " 6.0,\n",
+       " 6.082762530298219,\n",
+       " 6.164414002968976,\n",
+       " 6.244997998398398,\n",
+       " 6.324555320336759,\n",
+       " 6.4031242374328485,\n",
+       " 6.48074069840786,\n",
+       " 6.557438524302,\n",
+       " 6.6332495807108,\n",
+       " 6.708203932499369,\n",
+       " 6.782329983125268,\n",
+       " 6.855654600401044,\n",
+       " 6.928203230275509,\n",
+       " 7.0,\n",
+       " 7.0710678118654755,\n",
+       " 7.14142842854285,\n",
+       " 7.211102550927978,\n",
+       " 7.280109889280518,\n",
+       " 7.3484692283495345,\n",
+       " 7.416198487095663,\n",
+       " 7.483314773547883,\n",
+       " 7.54983443527075,\n",
+       " 7.615773105863909,\n",
+       " 7.681145747868608,\n",
+       " 7.745966692414834,\n",
+       " 7.810249675906654,\n",
+       " 7.874007874011811,\n",
+       " 7.937253933193772,\n",
+       " 8.0,\n",
+       " 8.06225774829855,\n",
+       " 8.12403840463596,\n",
+       " 8.18535277187245,\n",
+       " 8.246211251235321,\n",
+       " 8.306623862918075,\n",
+       " 8.366600265340756,\n",
+       " 8.426149773176359,\n",
+       " 8.48528137423857,\n",
+       " 8.54400374531753,\n",
+       " 8.602325267042627,\n",
+       " 8.660254037844387,\n",
+       " 8.717797887081348,\n",
+       " 8.774964387392123,\n",
+       " 8.831760866327848,\n",
+       " 8.888194417315589,\n",
+       " 8.94427190999916,\n",
+       " 9.0,\n",
+       " 9.055385138137417,\n",
+       " 9.1104335791443,\n",
+       " 9.16515138991168,\n",
+       " 9.219544457292887,\n",
+       " 9.273618495495704,\n",
+       " 9.327379053088816,\n",
+       " 9.38083151964686,\n",
+       " 9.433981132056603,\n",
+       " 9.486832980505138,\n",
+       " 9.539392014169456,\n",
+       " 9.591663046625438,\n",
+       " 9.643650760992955,\n",
+       " 9.695359714832659,\n",
+       " 9.746794344808963,\n",
+       " 9.797958971132712,\n",
+       " 9.848857801796104,\n",
+       " 9.899494936611665,\n",
+       " 9.9498743710662]"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "#Another way to do it:\n",
+    "\n",
+    "sqrt = [math.sqrt(x) for x in range(1,100)]\n",
+    "sqrt"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -77,11 +234,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 297,
    "id": "e23d87ea",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0]\n"
+     ]
+    }
+   ],
+   "source": [
+    "my_list = [i for i in range(-10, 1)]\n",
+    "\n",
+    "print(my_list)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -95,11 +264,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 298,
    "id": "d8d1c865",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99]\n"
+     ]
+    }
+   ],
+   "source": [
+    "odds = [i for i in range (1,101) if i % 2 != 0]\n",
+    "\n",
+    "print(odds)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -112,11 +293,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 299,
    "id": "6a9cfb8c",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, 105, 112, 119, 126, 133, 140, 147, 154, 161, 168, 175, 182, 189, 196, 203, 210, 217, 224, 231, 238, 245, 252, 259, 266, 273, 280, 287, 294, 301, 308, 315, 322, 329, 336, 343, 350, 357, 364, 371, 378, 385, 392, 399, 406, 413, 420, 427, 434, 441, 448, 455, 462, 469, 476, 483, 490, 497, 504, 511, 518, 525, 532, 539, 546, 553, 560, 567, 574, 581, 588, 595, 602, 609, 616, 623, 630, 637, 644, 651, 658, 665, 672, 679, 686, 693, 700, 707, 714, 721, 728, 735, 742, 749, 756, 763, 770, 777, 784, 791, 798, 805, 812, 819, 826, 833, 840, 847, 854, 861, 868, 875, 882, 889, 896, 903, 910, 917, 924, 931, 938, 945, 952, 959, 966, 973, 980, 987, 994]\n"
+     ]
+    }
+   ],
+   "source": [
+    "divisible_by_seven = [i for i in range (1,1001) if i % 7 == 0]\n",
+    "\n",
+    "print(divisible_by_seven)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -129,7 +322,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 300,
    "id": "43b38bd3",
    "metadata": {},
    "outputs": [],
@@ -141,11 +334,26 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "id": "d5fc7426",
+   "execution_count": 301,
+   "id": "ba7a0788",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['s', 't', 'h', 'r']\n"
+     ]
+    }
+   ],
+   "source": [
+    "string = \"Esther\"\n",
+    "vowels = ('a', 'e', 'i', 'o', 'u')\n",
+    "\n",
+    "non_vowels = [i for i in string if i.lower() not in vowels]\n",
+    "\n",
+    "print(non_vowels)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -160,11 +368,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 302,
    "id": "3a43399c",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['T', 'Q', 'B', 'F', 'J', 'O', 'L', 'D']\n"
+     ]
+    }
+   ],
+   "source": [
+    "sentence = \"The Quick Brown Fox Jumped Over the Lazy Dog\"\n",
+    "capital_letters = [i for i in str(sentence) if i.isupper()]\n",
+    "\n",
+    "print(capital_letters)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -179,11 +400,26 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "id": "3ddb68df",
+   "execution_count": 303,
+   "id": "0e83a4a3",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['T', 'h', 'q', 'c', 'k', 'b', 'r', 'w', 'n', 'f', 'x', 'j', 'm', 'p', 'd', 'v', 'r', 't', 'h', 'l', 'z', 'y', 'd', 'g']\n"
+     ]
+    }
+   ],
+   "source": [
+    "sentence1 = \"The quick brown fox jumped over the lazy dog\"\n",
+    "vowels = ('a', 'e', 'i', 'o', 'u')\n",
+    "\n",
+    "consonants = [i for i in str(sentence1) if i.isalpha() and i.lower() not in vowels]\n",
+    "\n",
+    "print(consonants)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -201,11 +437,25 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 304,
    "id": "22bb13eb",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['.git', '.gitignore', 'cheatsheet', 'datasets', 'example', 'faq-and-examples', 'images', 'README.md', 'troubleshooting', 'week-1', 'week-2']\n"
+     ]
+    }
+   ],
+   "source": [
+    "directory = r\"C:\\Users\\photo\\Desktop\\Ironhack\\lectures\" \n",
+    "\n",
+    "files = [i for i in os.listdir(directory)]\n",
+    "\n",
+    "print(files)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -220,11 +470,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 305,
    "id": "120b29bd",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[[83, 29, 98, 51, 69, 64, 96, 47, 79, 64], [92, 26, 60, 55, 97, 64, 61, 21, 76, 90], [76, 46, 70, 87, 9, 98, 45, 18, 21, 66], [1, 58, 7, 49, 12, 12, 32, 51, 79, 23]]\n"
+     ]
+    }
+   ],
+   "source": [
+    "random_lists = [[random.randint(0, 100) for i in range(10)] for i in range(4)]\n",
+    "\n",
+    "print(random_lists)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -238,7 +500,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 306,
    "id": "b3afebb7",
    "metadata": {},
    "outputs": [],
@@ -248,11 +510,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 307,
    "id": "b6bcef37",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[1, 2, 3, 4, 5, 6, 7, 8, 9]\n"
+     ]
+    }
+   ],
+   "source": [
+    "flatten_list = [j for i in list_of_lists for j in i]\n",
+    "\n",
+    "print(flatten_list)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -267,23 +541,37 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 308,
    "id": "7087f44e",
    "metadata": {},
    "outputs": [],
    "source": [
-    "list_of_lists = [['40', '20', '10', '30'], ['20', '20', '20', '20', '20', '30', '20'], \\\n",
+    "list_of_lists1 = [['40', '20', '10', '30'], ['20', '20', '20', '20', '20', '30', '20'], \\\n",
     "['30', '20', '30', '50', '10', '30', '20', '20', '20'], ['100', '100'], ['100', '100', '100', '100', '100'], \\\n",
     "['100', '100', '100', '100']]"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 309,
    "id": "a932aff5",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[[40.0, 20.0, 10.0, 30.0], [20.0, 20.0, 20.0, 20.0, 20.0, 30.0, 20.0], [30.0, 20.0, 30.0, 50.0, 10.0, 30.0, 20.0, 20.0, 20.0], [100.0, 100.0], [100.0, 100.0, 100.0, 100.0, 100.0], [100.0, 100.0, 100.0, 100.0]]\n"
+     ]
+    }
+   ],
+   "source": [
+    "floats = [x for i in list_of_lists1 for x in i] #I changed the original listt into list_of_list1 otherwise the function was takent he list_of_list from the last exercise\n",
+    "\n",
+    "floats = [[float(i) for i in sublist] for sublist in list_of_lists1]\n",
+    "\n",
+    "print(floats)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -295,23 +583,28 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "id": "b5980ab4",
+   "execution_count": 310,
+   "id": "3605fc78",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "You cannot multiply strings\n",
+      "You cannot multiply strings\n",
+      "You cannot multiply strings\n"
+     ]
+    }
+   ],
    "source": [
-    "for i in ['a','b','c']:\n",
-    "    print i**2"
+    "for i in ['a', 'b', 'c']:\n",
+    "    try:\n",
+    "        print(i**2)\n",
+    "    except TypeError:\n",
+    "        print(\"You cannot multiply strings\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "3605fc78",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "bda76246",
@@ -326,25 +619,29 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 311,
    "id": "441acd1c",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "You cannot divide by zero\n"
+     ]
+    }
+   ],
    "source": [
     "x = 5\n",
     "y = 0\n",
     "\n",
-    "z = x/y"
+    "try:\n",
+    "    z = x/y\n",
+    "    print(z)\n",
+    "except ZeroDivisionError:\n",
+    "    print(\"You cannot divide by zero\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "976fec9f",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "85ea78c5",
@@ -357,23 +654,29 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 312,
    "id": "783a8224",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "List index out of range\n"
+     ]
+    }
+   ],
    "source": [
     "abc=[10,20,20]\n",
-    "print(abc[3])"
+    "\n",
+    "try:\n",
+    "    print(abc[3])\n",
+    "    \n",
+    "except IndexError:\n",
+    "    \n",
+    "    print(\"List index out of range\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "cfcf15f0",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "10223640",
@@ -388,11 +691,55 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 313,
    "id": "3c1f141b",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Unsupported operand type(s) for /: 'str' and 'int'\n"
+     ]
+    }
+   ],
+   "source": [
+    "x = \"hola\"\n",
+    "y = 3\n",
+    "\n",
+    "try:\n",
+    "    print(x/y)\n",
+    "\n",
+    "except TypeError:\n",
+    "    print(\"Unsupported operand type(s) for /: 'str' and 'int'\")\n",
+    "    "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "7aa13172",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "You cannot divide by zero\n"
+     ]
+    }
+   ],
+   "source": [
+    "p = 7\n",
+    "c = 0\n",
+    "\n",
+    "try:\n",
+    "    u = (p/c)\n",
+    "    print(u)\n",
+    "    \n",
+    "except ZeroDivisionError:\n",
+    "    print(\"You cannot divide by zero\")"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -406,35 +753,28 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 314,
    "id": "b73f824c",
    "metadata": {},
    "outputs": [
     {
-     "ename": "FileNotFoundError",
-     "evalue": "[Errno 2] No such file or directory: 'testfile'",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mFileNotFoundError\u001b[0m                         Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-1-cd8832385d15>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mf\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mopen\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'testfile'\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m'r'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0mf\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mwrite\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'Test write this'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mFileNotFoundError\u001b[0m: [Errno 2] No such file or directory: 'testfile'"
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "No such file or directory: 'testfile'\n"
      ]
     }
    ],
    "source": [
-    "f = open('testfile','r')\n",
-    "f.write('Test write this')"
+    "try:\n",
+    "    f = open('testfile','r')\n",
+    "    f.write('Test write this')\n",
+    "    \n",
+    "except FileNotFoundError:\n",
+    "    \n",
+    "    print(\"No such file or directory: 'testfile'\")\n"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "5a1cb361",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "a028ccb8",
@@ -447,23 +787,27 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 315,
    "id": "5f639ab1",
    "metadata": {},
    "outputs": [
     {
-     "ename": "IndentationError",
-     "evalue": "unexpected indent (<ipython-input-2-f4ec7bf448fd>, line 2)",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-2-f4ec7bf448fd>\"\u001b[0;36m, line \u001b[0;32m2\u001b[0m\n\u001b[0;31m    line = f.readline()\u001b[0m\n\u001b[0m    ^\u001b[0m\n\u001b[0;31mIndentationError\u001b[0m\u001b[0;31m:\u001b[0m unexpected indent\n"
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "No such file or directory: 'myfile.txt'\n"
      ]
     }
    ],
    "source": [
-    "fp = open('myfile.txt')\n",
+    "try:\n",
+    "    fp = open('myfile.txt')\n",
     "    line = f.readline()\n",
-    "    i = int(s.strip())\n"
+    "    i = int(s.strip())\n",
+    "    \n",
+    "except FileNotFoundError:\n",
+    "    print(\"No such file or directory: 'myfile.txt'\")\n",
+    "    "
    ]
   },
   {
@@ -481,38 +825,31 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 328,
    "id": "3f043ef6",
    "metadata": {},
    "outputs": [
     {
-     "ename": "NameError",
-     "evalue": "name 'sys' is not defined",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-5-a780eef459e9>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      2\u001b[0m     \u001b[0;32massert\u001b[0m \u001b[0;34m(\u001b[0m\u001b[0;34m'linux'\u001b[0m \u001b[0;32min\u001b[0m \u001b[0msys\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mplatform\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"Function can only run on Linux systems.\"\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      3\u001b[0m     \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'Doing something.'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 4\u001b[0;31m \u001b[0mlinux_interaction\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m<ipython-input-5-a780eef459e9>\u001b[0m in \u001b[0;36mlinux_interaction\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mlinux_interaction\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m     \u001b[0;32massert\u001b[0m \u001b[0;34m(\u001b[0m\u001b[0;34m'linux'\u001b[0m \u001b[0;32min\u001b[0m \u001b[0msys\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mplatform\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"Function can only run on Linux systems.\"\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      3\u001b[0m     \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'Doing something.'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      4\u001b[0m \u001b[0mlinux_interaction\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mNameError\u001b[0m: name 'sys' is not defined"
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Function can only run in Linux system\n"
      ]
     }
    ],
    "source": [
     "def linux_interaction():\n",
-    "    assert ('linux' in sys.platform), \"Function can only run on Linux systems.\"\n",
+    "    assert ('linux' in sys.platform), \"Function can only run in Linux system\"\n",
     "    print('Doing something.')\n",
-    "linux_interaction()"
+    "\n",
+    "try:\n",
+    "    linux_interaction()\n",
+    "except NameError:\n",
+    "    print(\"Name Error\")\n",
+    "except AssertionError:\n",
+    "    print(\"Function can only run in Linux system\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "1643bbed",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "9310a60b",
@@ -544,11 +881,39 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 15,
    "id": "94c2e76e",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Please enter an integer: 1.5\n",
+      "Invalid input. Please enter a valid integer.\n",
+      "Please enter an integer: 1.6\n",
+      "Invalid input. Please enter a valid integer.\n",
+      "Please enter an integer: 5\n",
+      "The square of 5 is 25.\n"
+     ]
+    }
+   ],
+   "source": [
+    "def get_square():\n",
+    "    \n",
+    "    while True:\n",
+    "        try:\n",
+    "            user_input = input(\"Please enter an integer: \")\n",
+    "            integer_value = int(user_input)\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid input. Please enter a valid integer.\")\n",
+    "        else:\n",
+    "            square = integer_value ** 2\n",
+    "            print(f\"The square of {integer_value} is {square}.\")\n",
+    "            break\n",
+    "\n",
+    "get_square()"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -563,11 +928,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 20,
    "id": "90d3aa37",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100, 102, 104, 105, 106, 108, 110, 111, 112, 114, 115, 116, 117, 118, 119, 120, 122, 123, 124, 125, 126, 128, 129, 130, 132, 133, 134, 135, 136, 138, 140, 141, 142, 144, 145, 146, 147, 148, 150, 152, 153, 154, 155, 156, 158, 159, 160, 161, 162, 164, 165, 166, 168, 170, 171, 172, 174, 175, 176, 177, 178, 180, 182, 183, 184, 185, 186, 188, 189, 190, 192, 194, 195, 196, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 212, 213, 214, 215, 216, 217, 218, 219, 220, 222, 224, 225, 226, 228, 230, 231, 232, 234, 235, 236, 237, 238, 240, 242, 243, 244, 245, 246, 248, 249, 250, 252, 254, 255, 256, 258, 259, 260, 261, 262, 264, 265, 266, 267, 268, 270, 272, 273, 274, 275, 276, 278, 279, 280, 282, 284, 285, 286, 287, 288, 290, 291, 292, 294, 295, 296, 297, 298, 300, 301, 302, 303, 304, 305, 306, 308, 309, 310, 312, 314, 315, 316, 318, 320, 321, 322, 324, 325, 326, 327, 328, 329, 330, 332, 333, 334, 335, 336, 338, 339, 340, 342, 343, 344, 345, 346, 348, 350, 351, 352, 354, 355, 356, 357, 358, 360, 362, 363, 364, 365, 366, 368, 369, 370, 371, 372, 374, 375, 376, 378, 380, 381, 382, 384, 385, 386, 387, 388, 390, 392, 393, 394, 395, 396, 398, 399, 400, 402, 404, 405, 406, 408, 410, 411, 412, 413, 414, 415, 416, 417, 418, 420, 422, 423, 424, 425, 426, 427, 428, 429, 430, 432, 434, 435, 436, 438, 440, 441, 442, 444, 445, 446, 447, 448, 450, 452, 453, 454, 455, 456, 458, 459, 460, 462, 464, 465, 466, 468, 469, 470, 471, 472, 474, 475, 476, 477, 478, 480, 482, 483, 484, 485, 486, 488, 489, 490, 492, 494, 495, 496, 497, 498, 500, 501, 502, 504, 505, 506, 507, 508, 510, 511, 512, 513, 514, 515, 516, 518, 519, 520, 522, 524, 525, 526, 528, 530, 531, 532, 534, 535, 536, 537, 538, 539, 540, 542, 543, 544, 545, 546, 548, 549, 550, 552, 553, 554, 555, 556, 558, 560, 561, 562, 564, 565, 566, 567, 568, 570, 572, 573, 574, 575, 576, 578, 579, 580, 581, 582, 584, 585, 586, 588, 590, 591, 592, 594, 595, 596, 597, 598, 600, 602, 603, 604, 605, 606, 608, 609, 610, 612, 614, 615, 616, 618, 620, 621, 622, 623, 624, 625, 626, 627, 628, 630, 632, 633, 634, 635, 636, 637, 638, 639, 640, 642, 644, 645, 646, 648, 650, 651, 652, 654, 655, 656, 657, 658, 660, 662, 663, 664, 665, 666, 668, 669, 670, 672, 674, 675, 676, 678, 679, 680, 681, 682, 684, 685, 686, 687, 688, 690, 692, 693, 694, 695, 696, 698, 699, 700, 702, 704, 705, 706, 707, 708, 710, 711, 712, 714, 715, 716, 717, 718, 720, 721, 722, 723, 724, 725, 726, 728, 729, 730, 732, 734, 735, 736, 738, 740, 741, 742, 744, 745, 746, 747, 748, 749, 750, 752, 753, 754, 755, 756, 758, 759, 760, 762, 763, 764, 765, 766, 768, 770, 771, 772, 774, 775, 776, 777, 778, 780, 782, 783, 784, 785, 786, 788, 789, 790, 791, 792, 794, 795, 796, 798, 800, 801, 802, 804, 805, 806, 807, 808, 810, 812, 813, 814, 815, 816, 818, 819, 820, 822, 824, 825, 826, 828, 830, 831, 832, 833, 834, 835, 836, 837, 838, 840, 842, 843, 844, 845, 846, 847, 848, 849, 850, 852, 854, 855, 856, 858, 860, 861, 862, 864, 865, 866, 867, 868, 870, 872, 873, 874, 875, 876, 878, 879, 880, 882, 884, 885, 886, 888, 889, 890, 891, 892, 894, 895, 896, 897, 898, 900, 902, 903, 904, 905, 906, 908, 909, 910, 912, 914, 915, 916, 917, 918, 920, 921, 922, 924, 925, 926, 927, 928, 930, 931, 932, 933, 934, 935, 936, 938, 939, 940, 942, 944, 945, 946, 948, 950, 951, 952, 954, 955, 956, 957, 958, 959, 960, 962, 963, 964, 965, 966, 968, 969, 970, 972, 973, 974, 975, 976, 978, 980, 981, 982, 984, 985, 986, 987, 988, 990, 992, 993, 994, 995, 996, 998, 999, 1000]\n"
+     ]
+    }
+   ],
+   "source": [
+    "results = [x for x in range(1, 1001) if any(x % i == 0 for i in range(2, 10))]\n",
+    "\n",
+    "print(results)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -583,7 +960,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 25,
    "id": "86fa19bf",
    "metadata": {},
    "outputs": [
@@ -591,33 +968,28 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Enter Total Marks Scored: ass\n"
-     ]
-    },
-    {
-     "ename": "ValueError",
-     "evalue": "invalid literal for int() with base 10: 'ass'",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mValueError\u001b[0m                                Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-6-94b26594c4c4>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mTotal_Marks\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minput\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Enter Total Marks Scored: \"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0mNum_of_Sections\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minput\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Enter Num of Sections: \"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mValueError\u001b[0m: invalid literal for int() with base 10: 'ass'"
+      "Enter Total Marks Scored: i\n",
+      "Error: Please enter valid integer values for Total Marks and Num of Sections.\n"
      ]
     }
    ],
    "source": [
-    "Total_Marks = int(input(\"Enter Total Marks Scored: \")) \n",
-    "Num_of_Sections = int(input(\"Enter Num of Sections: \"))"
+    "class customised_exception(Exception):\n",
+    "    def __init__(self, message=\"The number of sections cannot be less than 2.\"):\n",
+    "        self.message = message\n",
+    "\n",
+    "try:\n",
+    "    Total_Marks = int(input(\"Enter Total Marks Scored: \"))\n",
+    "    Num_of_Sections = int(input(\"Enter Num of Sections: \"))\n",
+    "    \n",
+    "    if Num_of_Sections < 2:\n",
+    "        raise customised_exception\n",
+    "\n",
+    "except customised_exception as e:\n",
+    "    print(f\"Error: {e}\")\n",
+    "except ValueError:\n",
+    "    print(\"Error: Please enter valid integer values for Total Marks and Num of Sections.\")"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "f80bb764",
-   "metadata": {},
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {
@@ -636,7 +1008,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.13"
+   "version": "3.10.9"
   },
   "toc": {
    "base_numbering": 1,