{"id":25584,"date":"2021-11-23T08:55:02","date_gmt":"2021-11-23T03:25:02","guid":{"rendered":"https:\/\/python-programs.com\/?p=25584"},"modified":"2021-11-23T08:55:02","modified_gmt":"2021-11-23T03:25:02","slug":"python-itertools-islice-function-with-examples","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-itertools-islice-function-with-examples\/","title":{"rendered":"Python Itertools.islice() Function with Examples"},"content":{"rendered":"<p><strong>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.islice() Function:<\/strong><\/p>\n<p>This iterator prints only the values specified in the iterable container passed as an argument.<\/p>\n<p><strong>Syntax:<\/strong><\/p>\n<pre>islice(iterable, start, stop, step)<\/pre>\n<p><strong>Examples:<\/strong><\/p>\n<p><strong>Example1:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given list = [10, 20, 30, 40]\r\nGiven start = 2\r\nGiven stop =  25\r\nGiven step = 3<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>[30]<\/pre>\n<p><strong>Example2:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given list = [2, 5, 6, 7, 8]\r\nGiven start = 3\r\nGiven stop = 20\r\nGiven step = 3<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>[7]<\/pre>\n<h2>Itertools.islice() 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 islice() function from itertools using the import keyword.<\/li>\n<li>Loop using the islice and for loop by passing the arguments range and stepvalue.<\/li>\n<li>Inside the loop, print the iterator value.<\/li>\n<li>Give the list as static input and store it in a variable.<\/li>\n<li>Use the islice() function by passing the arguments given list, start, end, and step values for slicing the given list.<\/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 another variable.<\/li>\n<li>Print the above result.<\/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 islice() function from itertools using the import keyword.\r\nfrom itertools import islice\r\n\r\n\r\n# Loop using the islice function and for loop by passing the arguments as range\r\n# and stepvalue.\r\nfor itr in islice(range(15), 2):\r\n    # Inside the loop, print the iterator value.\r\n    print(itr)\r\n\r\n# Give the list as static input and store it in a variable.\r\ngvn_lst = [1, 4, 2, 3, 8, 9]\r\n# Use the islice() function by passing the arguments given list, start, end, and\r\n# step values for slicing the given list.\r\n# Store it in another variable.\r\nrslt = islice(gvn_lst, 2, 5, 2)\r\n# Convert the above result into a list using the list() function and store it in\r\n# another variable.\r\nrslt_lst = list(rslt)\r\n# Print the above result.\r\nprint(rslt_lst)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">0\r\n1\r\n[2, 8]<\/pre>\n<p><strong>Similarly, try for the other examples<\/strong><\/p>\n<p>Here we are giving range, start and stop values as arguments to the islice() function<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Import islice() function from itertools using the import keyword.\r\nfrom itertools import islice\r\n\r\n# Loop using the islice function and for loop by passing the arguments as range\r\n# start, stop values.\r\nfor itr in islice(range(23), 2, 10):\r\n    print(itr)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">2\r\n3\r\n4\r\n5\r\n6\r\n7\r\n8\r\n9<\/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 islice() function from itertools using the import keyword.<\/li>\n<li>Loop using the islice and for loop by passing the arguments range and stepvalue.<\/li>\n<li>Inside the loop, print the iterator value.<\/li>\n<li>Give the list as user input using list(),map(),input(),and split() functions.<\/li>\n<li>Store it in a variable.<\/li>\n<li>Give the start value as user input using the int(input()) function and store it in a variable.<\/li>\n<li>Give the stop value as user input using the int(input()) function and store it in another variable.<\/li>\n<li>Give the step value as user input using the int(input()) function and store it in another variable.<\/li>\n<li>Use the islice() function by passing the arguments given list, start, end, and step values for slicing the given list.<\/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 another variable.<\/li>\n<li>Print the above result.<\/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 islice() function from itertools using the import keyword.\r\nfrom itertools import islice\r\n\r\n\r\n# Give the list as user input using list(),map(),input(),and split() functions.\r\n# Store it in a variable.\r\ngvn_lst = list(map(int, input(\r\n   'Enter some random List Elements separated by spaces = ').split()))\r\n# Give the start value as user input using the int(input()) function and store it in a variable.\r\ngvn_strt = int(input(\"Enter some random number = \"))\r\n# Give the stop value as user input using the int(input()) function and store it in another variable.\r\ngvn_stop = int(input(\"Enter some random number = \"))\r\n# Give the step value as user input using the int(input()) function and store it in another variable.\r\ngvn_step = int(input(\"Enter some random number = \"))\r\n# Use the islice() function by passing the arguments given list, start, end, and\r\n# step values for slicing the given list.\r\n# Store it in another variable.\r\nrslt = islice(gvn_lst, gvn_strt, gvn_stop, gvn_step)\r\n# Convert the above result into a list using the list() function and store it in\r\n# another variable.\r\nrslt_lst = list(rslt)\r\n# Print the above result.\r\nprint(rslt_lst)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>Enter some random List Elements separated by spaces = 10 20 30 40\r\nEnter some random number = 2\r\nEnter some random number = 25\r\nEnter some random number = 3\r\n[30]<\/pre>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\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.islice() Function: This iterator prints only the values specified in the iterable container passed as an argument. Syntax: islice(iterable, start, stop, step) Examples: Example1: &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-itertools-islice-function-with-examples\/\"> <span class=\"screen-reader-text\">Python Itertools.islice() 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.islice() 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-islice-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.islice() 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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