{"id":25055,"date":"2021-11-10T09:37:22","date_gmt":"2021-11-10T04:07:22","guid":{"rendered":"https:\/\/python-programs.com\/?p=25055"},"modified":"2021-11-10T09:37:22","modified_gmt":"2021-11-10T04:07:22","slug":"python-set-difference_update-method-with-examples","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-set-difference_update-method-with-examples\/","title":{"rendered":"Python Set difference_update() Method with Examples"},"content":{"rendered":"<h5>Prerequisite:<\/h5>\n<p><a href=\"https:\/\/python-programs.com\/python-set-function-with-examples\/\"><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Python set() Function with Examples&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:4224,&quot;10&quot;:2,&quot;15&quot;:&quot;Arial&quot;}\">Python set() Function with Examples<\/span><\/a><\/p>\n<p><strong>Set difference_update() Method in Python:<\/strong><\/p>\n<p>The difference_update() method removes items from both sets.<\/p>\n<p>The difference_update() method differs from the difference() method in that the difference() method returns a new set that does not include the unwanted items, whereas the difference_update() method removes the unwanted items from the original set.<\/p>\n<p><strong>For Example<\/strong><\/p>\n<p>If P and Q are two distinct sets. A set difference between P and Q is a set of elements that exist only in set P but not in set Q.<\/p>\n<p>The difference_update() replaces set P with the P-Q set difference.<\/p>\n<p><strong>Syntax:<\/strong><\/p>\n<pre>set.difference_update(set)<\/pre>\n<p><strong>Parameters<\/strong><\/p>\n<p><strong>set:<\/strong> This is Required. The set used to look for differences.<\/p>\n<p><strong>Return Value:<\/strong><\/p>\n<p>difference_update() produces a result None, indicating that the object (set) has been mutated.<\/p>\n<p>Let P, Q be two sets<\/p>\n<p>When you execute the code,<\/p>\n<ul>\n<li>The result is None.<\/li>\n<li>P will be updated to P-Q.<\/li>\n<li>Q will remain unchanged.<\/li>\n<\/ul>\n<p><strong>Examples:<\/strong><\/p>\n<p><strong>Example1:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given first set = {10, 11, 12, 13}\r\nGiven second set = {11, 12, 20, 14}<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The given first set is : {10, 13}\r\nThe given second set is : {11, 12, 20, 14}\r\nThe result after applying difference_update method:  None<\/pre>\n<p><strong>Explanation:<\/strong><\/p>\n<pre>Here it removes the common elements{11, 12} from the first set and\r\nupdates the given first set as {10, 13}.<\/pre>\n<p><strong>Example2:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given first set = {20, 30, 40, 20, 30, 50, 60}\r\nGiven second set = {40, 50, 60, 100, 80}<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The given first set is : {20, 30}\r\nThe given second set is : {100, 40, 80, 50, 60}\r\nThe result after applying difference_update method:  None<\/pre>\n<h2>Set difference_update() Method 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>Give the first set as static input and store it in a variable.<\/li>\n<li>Give the second set as static input and store it in another variable.<\/li>\n<li>Apply the difference_update() method to the given first and second sets.<\/li>\n<li>Store it in another variable.<\/li>\n<li>Print the given first set.<\/li>\n<li>Print the second set.<\/li>\n<li>Print the above result after applying the difference_update() method for the given sets.<\/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\"># Give the first set as static input and store it in a variable.\r\nfst_Set = {10, 11, 12, 13}\r\n# Give the second set as static input and store it in another variable.\r\nscnd_set = {11, 12, 20, 14}\r\n# Apply the difference_update() method to the given first and second sets.\r\n# Store it in another variable.\r\nrslt = fst_Set.difference_update(scnd_set)\r\n# print the given first set.\r\nprint(\"The given first set is :\", fst_Set)\r\n# print the given second set.\r\nprint(\"The given second set is :\", scnd_set)\r\n# Print the above result after applying difference_update() method for the given sets.\r\nprint(\"The result after applying difference_update method: \", rslt)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The given first set is : {10, 13}\r\nThe given second set is : {11, 12, 20, 14}\r\nThe result after applying difference_update method:  None<\/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>Give the first set as user input using set(),map(),input(),and split() functions.<\/li>\n<li>Store it in a variable.<\/li>\n<li>Give the second set as user input using set(),map(),input(),and split() functions.<\/li>\n<li>Store it in another variable.<\/li>\n<li>Apply the difference_update() method to the given first and second sets.<\/li>\n<li>Store it in another variable.<\/li>\n<li>Print the given first set.<\/li>\n<li>Print the second set.<\/li>\n<li>Print the above result after applying the difference_update() method for the given sets.<\/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\"># Give the first set as user input using set(),map(),input(),and split() functions.\r\n# Store it in a variable.\r\nfst_set = set(map(int, input(\r\n   'Enter some random Set Elements separated by spaces = ').split()))\r\n# Give the second set as user input using set(),map(),input(),and split() functions.\r\n# Store it in another variable.\r\nscnd_set = set(map(int, input(\r\n   'Enter some random Set Elements separated by spaces = ').split()))\r\n# Apply the difference_update() method to the given first and second sets.\r\n# Store it in another variable.\r\nrslt = fst_set.difference_update(scnd_set)\r\n# print the given first set.\r\nprint(\"The given first set is :\", fst_set)\r\n# print the second first set.\r\nprint(\"The given second set is :\", scnd_set)\r\n# Print the above result after applying difference_update method for the given sets.\r\nprint(\"The result after applying difference_update method: \", rslt)<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>Enter some random Set Elements separated by spaces = 10 20 15 16\r\nEnter some random Set Elements separated by spaces = 20 15 16 80\r\nThe given first set is : {10}\r\nThe given second set is : {16, 80, 20, 15}\r\nThe result after applying difference_update method: None<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Prerequisite: Python set() Function with Examples Set difference_update() Method in Python: The difference_update() method removes items from both sets. The difference_update() method differs from the difference() method in that the difference() method returns a new set that does not include the unwanted items, whereas the difference_update() method removes the unwanted items from the original set. &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-set-difference_update-method-with-examples\/\"> <span class=\"screen-reader-text\">Python Set difference_update() Method 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 Set difference_update() Method 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-set-difference_update-method-with-examples\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python Set difference_update() Method with Examples - Python Programs\" \/>\n<meta property=\"og:description\" content=\"Prerequisite: Python set() Function with Examples Set difference_update() Method in Python: The difference_update() method removes items from both sets. 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