diff --git a/lab-list-comprehension-en_lwd.ipynb b/lab-list-comprehension-en_lwd.ipynb new file mode 100644 index 0000000..e3f785e --- /dev/null +++ b/lab-list-comprehension-en_lwd.ipynb @@ -0,0 +1,395 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# List Comprehensions\n", + "\n", + "Complete the following set of exercises to solidify your knowledge of list comprehensions." + ] + }, + { + "cell_type": "code", + "execution_count": 1, + "metadata": {}, + "outputs": [], + "source": [ + "import os" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#### 1. Use a list comprehension to create and print a list of consecutive integers starting with 1 and ending with 50." + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50]\n" + ] + } + ], + "source": [ + "#your code here\n", + "integers_list=[]\n", + "for num in range(1,51):\n", + " integers_list.append(num)\n", + "print(integers_list)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#### 2. Use a list comprehension to create and print a list of even numbers starting with 2 and ending with 200." + ] + }, + { + "cell_type": "code", + "execution_count": 4, + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "[2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186, 188, 190, 192, 194, 196, 198, 200]\n" + ] + } + ], + "source": [ + "#your code here\n", + "even_num_list=[]\n", + "for num in range(2,201):\n", + " if num%2==0:\n", + " even_num_list.append(num)\n", + "print(even_num_list)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#### 3. Use a list comprehension to create and print a list containing all elements of the 10 x 4 array below." + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "metadata": {}, + "outputs": [], + "source": [ + "a = [[0.84062117, 0.48006452, 0.7876326 , 0.77109654],\n", + " [0.44409793, 0.09014516, 0.81835917, 0.87645456],\n", + " [0.7066597 , 0.09610873, 0.41247947, 0.57433389],\n", + " [0.29960807, 0.42315023, 0.34452557, 0.4751035 ],\n", + " [0.17003563, 0.46843998, 0.92796258, 0.69814654],\n", + " [0.41290051, 0.19561071, 0.16284783, 0.97016248],\n", + " [0.71725408, 0.87702738, 0.31244595, 0.76615487],\n", + " [0.20754036, 0.57871812, 0.07214068, 0.40356048],\n", + " [0.12149553, 0.53222417, 0.9976855 , 0.12536346],\n", + " [0.80930099, 0.50962849, 0.94555126, 0.33364763]];" + ] + }, + { + "cell_type": "code", + "execution_count": 7, + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "[0.84062117, 0.48006452, 0.7876326, 0.77109654, 0.44409793, 0.09014516, 0.81835917, 0.87645456, 0.7066597, 0.09610873, 0.41247947, 0.57433389, 0.29960807, 0.42315023, 0.34452557, 0.4751035, 0.17003563, 0.46843998, 0.92796258, 0.69814654, 0.41290051, 0.19561071, 0.16284783, 0.97016248, 0.71725408, 0.87702738, 0.31244595, 0.76615487, 0.20754036, 0.57871812, 0.07214068, 0.40356048, 0.12149553, 0.53222417, 0.9976855, 0.12536346, 0.80930099, 0.50962849, 0.94555126, 0.33364763]\n" + ] + } + ], + "source": [ + "#your code here\n", + "unested_lst=[]\n", + "for i in a:\n", + " for k in i:\n", + " unested_lst.append(k)\n", + "print(unested_lst)\n", + " " + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#### 4. Add a condition to the list comprehension above so that only values greater than or equal to 0.5 are printed." + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "0.84062117\n", + "0.7876326\n", + "0.77109654\n", + "0.81835917\n", + "0.87645456\n", + "0.7066597\n", + "0.57433389\n", + "0.92796258\n", + "0.69814654\n", + "0.97016248\n", + "0.71725408\n", + "0.87702738\n", + "0.76615487\n", + "0.57871812\n", + "0.53222417\n", + "0.9976855\n", + "0.80930099\n", + "0.50962849\n", + "0.94555126\n" + ] + } + ], + "source": [ + "#your code here\n", + "for num in unested_lst:\n", + " if num>=0.5:\n", + " print(num)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#### 5. Use a list comprehension to create and print a list containing all elements of the 5 x 2 x 3 array below." + ] + }, + { + "cell_type": "code", + "execution_count": 9, + "metadata": {}, + "outputs": [], + "source": [ + "b = [[[0.55867166, 0.06210792, 0.08147297],\n", + " [0.82579068, 0.91512478, 0.06833034]],\n", + "\n", + " [[0.05440634, 0.65857693, 0.30296619],\n", + " [0.06769833, 0.96031863, 0.51293743]],\n", + "\n", + " [[0.09143215, 0.71893382, 0.45850679],\n", + " [0.58256464, 0.59005654, 0.56266457]],\n", + "\n", + " [[0.71600294, 0.87392666, 0.11434044],\n", + " [0.8694668 , 0.65669313, 0.10708681]],\n", + "\n", + " [[0.07529684, 0.46470767, 0.47984544],\n", + " [0.65368638, 0.14901286, 0.23760688]]];" + ] + }, + { + "cell_type": "code", + "execution_count": 10, + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "[0.55867166, 0.06210792, 0.08147297, 0.82579068, 0.91512478, 0.06833034, 0.05440634, 0.65857693, 0.30296619, 0.06769833, 0.96031863, 0.51293743, 0.09143215, 0.71893382, 0.45850679, 0.58256464, 0.59005654, 0.56266457, 0.71600294, 0.87392666, 0.11434044, 0.8694668, 0.65669313, 0.10708681, 0.07529684, 0.46470767, 0.47984544, 0.65368638, 0.14901286, 0.23760688]\n" + ] + } + ], + "source": [ + "#your code here\n", + "unested_lstb=[]\n", + "for i in b:\n", + " for k in i:\n", + " for h in k:\n", + " unested_lstb.append(h)\n", + "print(unested_lstb)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#### 6. Add a condition to the list comprehension above so that the last value in each subarray is printed, but only if it is less than or equal to 0.5." + ] + }, + { + "cell_type": "code", + "execution_count": 11, + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "0.06210792\n", + "0.08147297\n", + "0.06833034\n", + "0.05440634\n", + "0.30296619\n", + "0.06769833\n", + "0.09143215\n", + "0.45850679\n", + "0.11434044\n", + "0.10708681\n", + "0.07529684\n", + "0.46470767\n", + "0.47984544\n", + "0.14901286\n", + "0.23760688\n" + ] + } + ], + "source": [ + "#your code here\n", + "for num in unested_lstb:\n", + " if num<=0.5:\n", + " print(num)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "### Bonus" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "Try to solve these katas using list comprehensions." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "**Easy**\n", + "- [Insert values](https://www.codewars.com/kata/invert-values)\n", + "- [Sum Square(n)](https://www.codewars.com/kata/square-n-sum)\n", + "- [Digitize](https://www.codewars.com/kata/digitize)\n", + "- [List filtering](https://www.codewars.com/kata/list-filtering)\n", + "- [Arithmetic list](https://www.codewars.com/kata/541da001259d9ca85d000688)\n", + "\n", + "**Medium**\n", + "- [Multiples of 3 or 5](https://www.codewars.com/kata/514b92a657cdc65150000006)\n", + "- [Count of positives / sum of negatives](https://www.codewars.com/kata/count-of-positives-slash-sum-of-negatives)\n", + "- [Categorize new member](https://www.codewars.com/kata/5502c9e7b3216ec63c0001aa)\n", + "\n", + "**Advanced**\n", + "- [Queue time counter](https://www.codewars.com/kata/queue-time-counter)" + ] + }, + { + "cell_type": "code", + "execution_count": 12, + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "[-1, -2, -3, -4, -5]\n" + ] + } + ], + "source": [ + "#Insert values\n", + "#Given a set of numbers, return the additive inverse of each. Each positive becomes negatives, and the negatives become positives.\n", + "#[1, 2, 3, 4, 5] --> [-1, -2, -3, -4, -5]\n", + "#[1, -2, 3, -4, 5] --> [-1, 2, -3, 4, -5]\n", + "#[] --> []\n", + "\n", + "list1=[1, 2, 3, 4, 5]\n", + "list1_updated=[]\n", + "\n", + "for num in list1:\n", + " num=num*-1\n", + " list1_updated.append(num)\n", + "print(list1_updated)" + ] + }, + { + "cell_type": "code", + "execution_count": 16, + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "46\n" + ] + } + ], + "source": [ + "### Sum Square(n)\n", + "#Complete the square sum function so that it squares each number passed into it and then sums the results together.\n", + "\n", + "#For example, for [1, 2, 2] it should return 9 because 1^2+2^2+2^2=9.\n", + "\n", + "num_list=[4, 3, 2, 4, 1]\n", + "total=0\n", + "\n", + "for num in num_list:\n", + " total+=num**2\n", + "print(total)" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "metadata": {}, + "outputs": [], + "source": [] + }, + { + "cell_type": "code", + "execution_count": null, + "metadata": {}, + "outputs": [], + "source": [] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 3 (ipykernel)", + "language": "python", + "name": "python3" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 3 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython3", + "version": "3.12.7" + }, + "vscode": { + "interpreter": { + "hash": "aee8b7b246df8f9039afb4144a1f6fd8d2ca17a180786b69acc140d282b71a49" + } + } + }, + "nbformat": 4, + "nbformat_minor": 4 +}