{"id":3744,"date":"2023-10-24T16:23:06","date_gmt":"2023-10-24T10:53:06","guid":{"rendered":"https:\/\/python-programs.com\/?p=3744"},"modified":"2023-11-10T11:57:06","modified_gmt":"2023-11-10T06:27:06","slug":"python-remove-all-elements-from-set-using-clear-difference_update-discard","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-remove-all-elements-from-set-using-clear-difference_update-discard\/","title":{"rendered":"Python: Remove All Elements from Set using Clear()\/Difference_Update()\/Discard()"},"content":{"rendered":"<p>Python set is a list of items that are not ordered. \u2013 Each element in the set must be unique and immutable, and duplicate elements are removed from the sets. Sets are mutable, which means they can be changed after they have been created.<\/p>\n<p>The elements of the set, unlike other Python sets, do not have an index, which means we cannot access any element of the set directly using the index. To get the list of elements, we can either print them all at once or loop through the collection.<\/p>\n<p><strong>Examples:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre><span class=\"enlighter-text\">givenset= <\/span><span class=\"enlighter-g1\">{<\/span><span class=\"enlighter-s0\">'this'<\/span><span class=\"enlighter-text\">, <\/span><span class=\"enlighter-s0\">'is'<\/span><span class=\"enlighter-text\">, <\/span><span class=\"enlighter-s0\">'BTechGeeks'<\/span><span class=\"enlighter-g1\">}<\/span><\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>set()<\/pre>\n<h2>Delete all the elements from the set<\/h2>\n<p>There are several ways to remove all the elements from the set some of them are:<\/p>\n<ul>\n<li><a href=\"#Using_discard()_function\">Using discard() function<\/a><\/li>\n<li><a href=\"#Using_clear()_function\">Using clear() function<\/a><\/li>\n<li><a href=\"#Using_difference_update()_method\">Using difference_update() method<\/a><\/li>\n<\/ul>\n<h3 id=\"Using_discard()_function\">Method #1:Using discard() function<\/h3>\n<p>In Python, the built-in method discard() removes an element from a collection only if it is already present. If the element is missing from the list, no error or exception is thrown, and the original set is printed.<\/p>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>While iterating over a set, we cannot modify it.<\/li>\n<li>So We will make a list of the set&#8217;s elements, then iterate through that list, removing each element from the set.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># given set\r\ngivenset = {'this', 'is', 'BTechGeeks'}\r\n\r\n# using for loop to traverse the set\r\nfor element in list(givenset):\r\n    # remove that element from set\r\n    givenset.discard(element)\r\n# print the set\r\nprint(givenset)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">set()<\/pre>\n<h3 id=\"Using_clear()_function\">Method #2:Using clear() function<\/h3>\n<p>The clear() method clears the set of all elements.<\/p>\n<p><strong>syntax:<\/strong><\/p>\n<pre>given_set.clear()<\/pre>\n<p><strong>parameters: <\/strong><\/p>\n<pre>The clear() method accepts no parameters.<\/pre>\n<p><strong>Return :<\/strong><\/p>\n<pre>The clear() method does not return a value.<\/pre>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># given set\r\ngivenset = {'this', 'is', 'BTechGeeks'}\r\n\r\n# using clear()\r\ngivenset.clear()\r\n# print the set\r\nprint(givenset)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>set()<\/pre>\n<h3 id=\"Using_clear()_function\">Method #3:Using difference_update() method<\/h3>\n<p>The Set class in Python has a function called difference update() that takes a sequence as an argument and removes all of the elements from the set. let us use this method to remove all the elements from the set<\/p>\n<p>We can pass given set as parameter for the difference_update() function<\/p>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># given set\r\ngivenset = {'this', 'is', 'BTechGeeks'}\r\n# using difference_update()\r\ngivenset.difference_update(givenset)\r\n# print the set\r\nprint(givenset)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>set()<\/pre>\n<p><strong>Related Programs<\/strong>:<\/p>\n<ul>\n<li><a href=\"https:\/\/python-programs.com\/python-set-remove-single-or-multiple-elements-from-a-set\/\">python set remove single or multiple elements from a set<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-remove-elements-from-list-by-index-or-indices\/\">python remove elements from list by index or indices<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-how-to-remove-multiple-elements-from-list\/\">python how to remove multiple elements from list<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-remove-elements-from-list-by-value\/\">python remove elements from list by value<\/li>\n<li><a href=\"https:\/\/python-programs.com\/7-ways-to-add-all-elements-of-list-to-set-in-python\/\">7 ways to add all elements of list to set in python<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-remove-all-numbers-from-string\/\">python remove all numbers from string<\/li>\n<li><a href=\"https:\/\/python-programs.com\/how-to-remove-elements-from-a-list-while-iterating-in-c\/\">how to remove elements from a list while iterating in c<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Python set is a list of items that are not ordered. \u2013 Each element in the set must be unique and immutable, and duplicate elements are removed from the sets. Sets are mutable, which means they can be changed after they have been created. The elements of the set, unlike other Python sets, do not &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-remove-all-elements-from-set-using-clear-difference_update-discard\/\"> <span class=\"screen-reader-text\">Python: Remove All Elements from Set using Clear()\/Difference_Update()\/Discard()<\/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: Remove All Elements from Set using Clear()\/Difference_Update()\/Discard() - 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-remove-all-elements-from-set-using-clear-difference_update-discard\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python: Remove All Elements from Set using Clear()\/Difference_Update()\/Discard() - Python Programs\" \/>\n<meta property=\"og:description\" content=\"Python set is a list of items that are not ordered. \u2013 Each element in the set must be unique and immutable, and duplicate elements are removed from the sets. 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