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diff --git a/challenge-184/steven-wilson/python/ch-01.ipynb b/challenge-184/steven-wilson/python/ch-01.ipynb new file mode 100644 index 0000000000..b6a7bb6a74 --- /dev/null +++ b/challenge-184/steven-wilson/python/ch-01.ipynb @@ -0,0 +1,245 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "id": "9127c568", + "metadata": {}, + "source": [ + "# Week 184 The Weekly Challenge\n", + "# Task 1: Sequence Number\n", + "\n", + "You are given list of strings in the format aa9999 i.e. first 2 characters can be anything 'a-z' followed by 4 digits '0-9'.\n", + "\n", + "Write a script to replace the first two characters with sequence starting with '00', '01', '02' etc.\n", + "\n", + "Example 1\n", + "\n", + "```\n", + "Input: @list = ( 'ab1234', 'cd5678', 'ef1342')\n", + "Output: ('001234', '015678', '021342')\n", + "```\n", + "\n", + "Example 2\n", + "\n", + "```\n", + "Input: @list = ( 'pq1122', 'rs3334')\n", + "Output: ('001122', '013334')\n", + "```" + ] + }, + { + "cell_type": "code", + "execution_count": 1, + "id": "d9ddd9d0", + "metadata": {}, + "outputs": [], + "source": [ + "import re" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "id": "0346d2ba", + "metadata": {}, + "outputs": [], + "source": [ + "input1 = ['ab1234', 'cd5678', 'ef1342']\n", + "output1 = ['001234', '015678', '021342']\n", + "input2 = ['pq1122', 'rs3334']\n", + "output2 = ['001122', '013334']" + ] + }, + { + "cell_type": "markdown", + "id": "336541b3", + "metadata": {}, + "source": [ + "Function to substitute the first 2 letters in a string with a given prefix:" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "id": "0b2cb0f3", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "'001122'" + ] + }, + "execution_count": 3, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "def change_prefix_string (string, prefix_string):\n", + " result = re.sub(r'^[a-z]{2}', prefix_string, string)\n", + " return result\n", + "\n", + "change_prefix_string(\"pq1122\", \"00\")" + ] + }, + { + "cell_type": "markdown", + "id": "b791cddb", + "metadata": {}, + "source": [ + "Working out how to create 0 padded prefix between 00 and 99. Loops back to 00 after 99 if more than 100:" + ] + }, + { + "cell_type": "code", + "execution_count": 4, + "id": "c7ee98bf", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "'01'" + ] + }, + "execution_count": 4, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "num = 1\n", + "prefix = (num) % 100\n", + "prefix_as_string = \"%02d\" % (prefix,)\n", + "prefix_as_string" + ] + }, + { + "cell_type": "markdown", + "id": "8825dd5b", + "metadata": {}, + "source": [ + "Function to generate a list of prefixes which are zero padded:" + ] + }, + { + "cell_type": "code", + "execution_count": 5, + "id": "8e168ad7", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "['00', '01', '02', '03', '04']" + ] + }, + "execution_count": 5, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "def generate_list_of_prefixes (number_of_prefixes):\n", + " list_of_prefixes = [\"%02d\" % (num % 100) for num in range(number_of_prefixes)]\n", + " return list_of_prefixes\n", + "\n", + "generate_list_of_prefixes(5)" + ] + }, + { + "cell_type": "markdown", + "id": "564c5b35", + "metadata": {}, + "source": [ + "Bringing everything together:" + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "id": "688ef188", + "metadata": {}, + "outputs": [], + "source": [ + "def change_prefix_list_of_strings (los):\n", + " length_of_list = len(los)\n", + " list_of_prefixes = generate_list_of_prefixes(length_of_list)\n", + " result_list = [change_prefix_string(los[i], list_of_prefixes[i]) for i in range(length_of_list)]\n", + " return result_list" + ] + }, + { + "cell_type": "markdown", + "id": "5e899500", + "metadata": {}, + "source": [ + "Testing the function with example lists above:" + ] + }, + { + "cell_type": "code", + "execution_count": 7, + "id": "f2e4b48b", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "['001234', '015678', '021342']" + ] + }, + "execution_count": 7, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "change_prefix_list_of_strings(input1)" + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "id": "b9fe98c2", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "['001122', '013334']" + ] + }, + "execution_count": 8, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "change_prefix_list_of_strings(input2)" + ] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 3", + "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": "3.8.10" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +} |