{"id":446,"date":"2024-11-14T09:16:17","date_gmt":"2024-11-14T09:16:17","guid":{"rendered":"https:\/\/techkubo.com\/python\/?p=446"},"modified":"2025-06-20T18:05:54","modified_gmt":"2025-06-20T18:05:54","slug":"python-map-filter-and-reduce-for-data-processing","status":"publish","type":"post","link":"https:\/\/techkubo.com\/python\/python-map-filter-and-reduce-for-data-processing\/","title":{"rendered":"Python map, filter, and reduce for Data Processing"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">What is map, filter, and reduce?<\/h2>\n\n\n\n<p>Python can also be used with functional programming with functions such as <strong>map<\/strong>, <strong>filter<\/strong>, and <strong>reduce<\/strong> which helps in efficient transformations, filtering, and aggregations on data collections.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>map<\/strong> applies a specified function to every item in an iterable (like a list) and returns the results.<\/li>\n\n\n\n<li><strong>filter<\/strong> removes items from a collection that don&#8217;t meet a specified condition.<\/li>\n\n\n\n<li><strong>reduce <\/strong>aggregates all items into a single result based on an operation.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Why use map, filter, and reduce?<\/h2>\n\n\n\n<p>These functions enable efficient data manipulation and make code more concise. They\u2019re helpful in tasks like applying adjustments to a list of barangay donations or selecting donations above a certain amount. By using <strong>map, filter, and reduce<\/strong>  you can perform these actions in one line, improving readability and functionality.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Syntax<\/h2>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre class=\"CodeMirror\" data-setting=\"{&quot;showPanel&quot;:true,&quot;languageLabel&quot;:&quot;language&quot;,&quot;fullScreenButton&quot;:true,&quot;copyButton&quot;:true,&quot;mode&quot;:&quot;python&quot;,&quot;mime&quot;:&quot;text\/x-python&quot;,&quot;theme&quot;:&quot;seti&quot;,&quot;lineNumbers&quot;:true,&quot;styleActiveLine&quot;:false,&quot;lineWrapping&quot;:false,&quot;readOnly&quot;:true,&quot;fileName&quot;:&quot;&quot;,&quot;language&quot;:&quot;Python&quot;,&quot;maxHeight&quot;:&quot;400px&quot;,&quot;modeName&quot;:&quot;python&quot;}\">map(function, iterable)\nfilter(function, iterable)\nreduce(function, iterable)<\/pre><\/div>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Example<\/h2>\n\n\n\n<p>Let&#8217;s say we want to filter, increase, and calculate the donations into a barangay we can do it using map, filter, and reduce.<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre class=\"CodeMirror\" data-setting=\"{&quot;showPanel&quot;:true,&quot;languageLabel&quot;:&quot;language&quot;,&quot;fullScreenButton&quot;:true,&quot;copyButton&quot;:true,&quot;mode&quot;:&quot;python&quot;,&quot;mime&quot;:&quot;text\/x-python&quot;,&quot;theme&quot;:&quot;seti&quot;,&quot;lineNumbers&quot;:true,&quot;styleActiveLine&quot;:false,&quot;lineWrapping&quot;:false,&quot;readOnly&quot;:true,&quot;fileName&quot;:&quot;&quot;,&quot;language&quot;:&quot;Python&quot;,&quot;maxHeight&quot;:&quot;400px&quot;,&quot;modeName&quot;:&quot;python&quot;}\"># Import reduce from functools\nfrom functools import reduce\n\ndonatios = [1000, 1500, 500, 2000, 2500]\n\n# Increase each donation by 10% using map\nupdated_donatios = list(map(lambda x: x*1.1,donations))\n\n# Filter donations abouve Php 2000\nlarge_donations = list(filter(lambda x : x &gt; 2000, updated_donations))\n\n# Calculate the total donation using reduce\ntotal_donation = reduce(lambda x, y: x + y, updated_donations)\n\nprint(&quot;Updated Donations:&quot;, updated_donations)  # Updated amounts\nprint(&quot;Large Donations:&quot;, large_donations)      # Donations above 2000\nprint(&quot;Total Donation:&quot;, total_donation)        # Sum of all donations<\/pre><\/div>\n\n\n\n<p><\/p>\n\n\n\n<iframe src=\"https:\/\/techkubo.com\/python-sim.html\" title=\"Try Python on TechKubo\" width=\"100%\" height=\"500\"><\/iframe>\n","protected":false},"excerpt":{"rendered":"<p>What is map, filter, and reduce? Python can also be used with functional programming with functions such as map, filter, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-446","post","type-post","status-publish","format-standard","hentry","category-python"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python map, filter, and reduce for Data Processing - Python Tutorial<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/techkubo.com\/python\/python-map-filter-and-reduce-for-data-processing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python map, filter, and reduce for Data Processing - Python Tutorial\" \/>\n<meta property=\"og:description\" content=\"What is map, filter, and reduce? 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