{"id":25575,"date":"2021-11-23T08:55:37","date_gmt":"2021-11-23T03:25:37","guid":{"rendered":"https:\/\/python-programs.com\/?p=25575"},"modified":"2021-11-23T08:55:37","modified_gmt":"2021-11-23T03:25:37","slug":"python-itertools-chain-from_iterable-function-with-examples","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-itertools-chain-from_iterable-function-with-examples\/","title":{"rendered":"Python Itertools.chain.from_iterable() Function with Examples"},"content":{"rendered":"<p><strong style=\"font-size: 16px;\">Itertools Module:<\/strong><\/p>\n<p>Itertools is a Python module that contains a collection of functions for dealing with iterators. They make it very simple to iterate through iterables such as lists and strings.<\/p>\n<p><strong>Itertools.chain.from_iterable() Function:<\/strong><\/p>\n<p>chain.from_iterable() belongs to the category of terminating iterators. This function takes a single iterable as an argument, and all of the elements of the input iterable must also be iterable, and it returns a flattened iterable containing all of the input iterable&#8217;s elements.<\/p>\n<p><strong>Syntax:<\/strong><\/p>\n<pre>chain.from_iterable(iterable)<\/pre>\n<p><strong>Parameters<\/strong><\/p>\n<p><strong>iterable:<\/strong> It could be any iterable like list, string, and so on.<\/p>\n<p><strong>Examples:<\/strong><\/p>\n<p><strong>Example1:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given List = [\"good\", \"morning\", \"all\"]<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The flattened list of the given list:\r\n['g', 'o', 'o', 'd', 'm', 'o', 'r', 'n', 'i', 'n', 'g', 'a', 'l', 'l']<\/pre>\n<p><strong>Example2:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given List = [\"hello\", ['a', 'l', 'l']]<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The flattened list of the given list:\r\n['h', 'e', 'l', 'l', 'o', 'a', 'l', 'l']<\/pre>\n<h2>Itertools.chain.from_iterable() Function with Examples in Python<\/h2>\n<ul>\n<li><a href=\"#Using_Built-in_Functions_(Static_Input)\">Using Built-in Functions (Static Input)<\/a><\/li>\n<li><a href=\"#Using_Built-in_Functions_(User_Input)\">Using Built-in Functions (User Input)<\/a><\/li>\n<\/ul>\n<h3 id=\"Using_Built-in_Functions_(Static_Input)\">Method #1: Using Built-in Functions (Static Input)<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Import itertools module using the import keyword.<\/li>\n<li>Give the list as static input and store it in a variable.<\/li>\n<li>Pass the given list as an argument to the itertools.chain.from_iterable() function that returns a flattened list (list of characters) containing all of the given list elements.<\/li>\n<li>Store it in another variable.<\/li>\n<li>Convert the above result into a list using the list() function and store it in a variable.<\/li>\n<li>Print the flattened list of the given list.<\/li>\n<li>The Exit of the Program.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Import itertools module using the import keyword.\r\nimport itertools\r\n# Give the list as static input and store it in a variable.\r\ngvn_lst = [\"good\", \"morning\", \"all\"]\r\n# Pass the given list as an argument to the itertools.chain.from_iterable()\r\n# function that returns a flattened list (list of characters) containing all\r\n# of the given list elements.\r\n# Store it in another variable.\r\nrslt_chain = itertools.chain.from_iterable(gvn_lst)\r\n# Convert the above result into a list using the list() function and store it\r\n# in a variable.\r\nrslt_lst = list(rslt_chain)\r\n# Print the flattened list of the given list.\r\nprint(\"The flattened list of the given list:\")\r\nprint(rslt_lst)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The flattened list of the given list:\r\n['g', 'o', 'o', 'd', 'm', 'o', 'r', 'n', 'i', 'n', 'g', 'a', 'l', 'l']<\/pre>\n<h5>string and List as one input at a time<\/h5>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Import itertools module using the import keyword.\r\nimport itertools\r\n# Give the list as static input and store it in a variable.\r\ngvn_lst = [\"hello\", ['a', 'l', 'l']]\r\n# Pass the given list as an argument to the itertools.chain.from_iterable()\r\n# function that returns a flattened list (list of characters) containing all\r\n# of the given list elements.\r\n# Store it in another variable.\r\nrslt_chain = itertools.chain.from_iterable(gvn_lst)\r\n# Convert the above result into a list using the list() function and store it\r\n# in a variable.\r\nrslt_lst = list(rslt_chain)\r\n# Print the flattened list of the given list.\r\nprint(\"The flattened list of the given list:\")\r\nprint(rslt_lst)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The flattened list of the given list:\r\n['h', 'e', 'l', 'l', 'o', 'a', 'l', 'l']<\/pre>\n<h3 id=\"Using_Built-in_Functions_(User_Input)\">Method #2: Using Built-in Functions (User Input)<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Import itertools module using the import keyword.<\/li>\n<li>Give the list as user input using list(), input(),and split() functions.<\/li>\n<li>Store it in a variable.<\/li>\n<li>Pass the given list as an argument to the itertools.chain.from_iterable() function that returns a flattened list (list of characters) containing all of the given list elements.<\/li>\n<li>Store it in another variable.<\/li>\n<li>Convert the above result into a list using the list() function and store it in a variable.<\/li>\n<li>Print the flattened list of the given list.<\/li>\n<li>The Exit of the Program.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Import itertools module using the import keyword.\r\nimport itertools\r\n# Give the list as user input using list(),input(),and split() functions.\r\n# Store it in a variable.\r\ngvn_lst = list(input(\r\n   'Enter some random List Elements separated by spaces = ').split())\r\n\r\n# Pass the given list as an argument to the itertools.chain.from_iterable()\r\n# function that returns a flattened list (list of characters) containing all\r\n# of the given list elements.\r\n# Store it in another variable.\r\nrslt_chain = itertools.chain.from_iterable(gvn_lst)\r\n# Convert the above result into a list using the list() function and store it\r\n# in a variable.\r\nrslt_lst = list(rslt_chain)\r\n# Print the flattened list of the given list.\r\nprint(\"The flattened list of the given list:\")\r\nprint(rslt_lst)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>Enter some random List Elements separated by spaces = python code\r\nThe flattened list of the given list:\r\n['p', 'y', 't', 'h', 'o', 'n', 'c', 'o', 'd', 'e']<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Itertools Module: Itertools is a Python module that contains a collection of functions for dealing with iterators. They make it very simple to iterate through iterables such as lists and strings. Itertools.chain.from_iterable() Function: chain.from_iterable() belongs to the category of terminating iterators. This function takes a single iterable as an argument, and all of the elements &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-itertools-chain-from_iterable-function-with-examples\/\"> <span class=\"screen-reader-text\">Python Itertools.chain.from_iterable() Function with Examples<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python Itertools.chain.from_iterable() Function with Examples - Python Programs<\/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:\/\/python-programs.com\/python-itertools-chain-from_iterable-function-with-examples\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python Itertools.chain.from_iterable() Function with Examples - Python Programs\" \/>\n<meta property=\"og:description\" content=\"Itertools Module: Itertools is a Python module that contains a collection of functions for dealing with iterators. 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