{"id":3044,"date":"2023-10-20T08:32:44","date_gmt":"2023-10-20T03:02:44","guid":{"rendered":"https:\/\/python-programs.com\/?p=3044"},"modified":"2023-11-10T11:51:25","modified_gmt":"2023-11-10T06:21:25","slug":"python-remove-first-element-from-a-list","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-remove-first-element-from-a-list\/","title":{"rendered":"Python: Remove First Element from a List"},"content":{"rendered":"<p>A list is used in Python to store the sequence of different types of data. Python lists are mutable, which means that their elements can be changed after they have been created. Python, on the other hand, has six data types that can be used to store sequences, with the first two on the list being the most common and accurate.<\/p>\n<p>A list is a collection of various types of values or objects. The list items are separated by a comma (,), which is enclosed in square brackets [].<\/p>\n<p><strong>Examples:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre id=\"c-60719d01142b3027475410-3\" class=\"c-line\"><span class=\"c-v\">givenlist<\/span>\u00a0<span class=\"c-o\">=<\/span> <span class=\"c-sy\">[\"Hello\", \"Btech\" , \"Geeks\" ,\"is\" ,\"new\" ,\"online\"<\/span>\u00a0<span class=\"c-sy\">]<\/span><\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>['Btech', 'Geeks', 'is', 'new', 'online']<\/pre>\n<p><strong>Explanation:<\/strong><\/p>\n<pre>Hello is the first element in givenlist hence it is deleted.<\/pre>\n<h2>Remove the First Element of a List<\/h2>\n<p>There are several ways to remove the first item from the list some of them are:<\/p>\n<ul>\n<li><a href=\"#Using_slicing\">Using slicing<\/a><\/li>\n<li><a href=\"#Using_del_keyword\">Using del keyword<\/a><\/li>\n<li><a href=\"#Using_pop()_function\">Using pop() function<\/a><\/li>\n<li><a href=\"#Using_remove()_function\">Using remove() function<\/a><\/li>\n<li><a href=\"#Using_deque()_function\">Using deque() function<\/a><\/li>\n<\/ul>\n<h3 id=\"Using_slicing\">&gt;Method #1:Using slicing<\/h3>\n<p>Lists can be cut in Python, as we all know. Slicing is a method of removing the first item from a list. The goal is to make a sublist that contains all of the elements of the list except the first one. Because the slice operation returns a new list, we must assign the new list to the original list. To accomplish this, use the expression l = l[1:], where l is your list. l[1:] is an abbreviation for l[0:len(l)-1].<\/p>\n<p>Below is the implementation:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Function which removes first element\r\ndef removeFirstElement(givenlist):\r\n    # using slicing\r\n    givenlist = givenlist[1:]\r\n    # return the result list\r\n    return givenlist\r\n\r\n\r\n# Driver code\r\n# given list\r\ngivenlist = [\"Hello\", \"Btech\", \"Geeks\", \"is\", \"new\", \"online\"]\r\n# passing list to remove first element\r\nprint(removeFirstElement(givenlist))\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">['Btech', 'Geeks', 'is', 'new', 'online']<\/pre>\n<h3 id=\"Using_del_keyword\">&gt;Method #2:Using del keyword<\/h3>\n<p>Another way to delete an element from a list is to use its index in the del statement. It differs from the pop() function in that it does not return the removed element. Unlike the slicing feature, this does not generate a new list.<\/p>\n<p>The index of first item in list is 0.<\/p>\n<p>Below is the implementation:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Function which removes first element\r\ndef removeFirstElement(givenlist):\r\n    # using del keyword\r\n    del givenlist[0]\r\n    # return the result list\r\n    return givenlist\r\n\r\n\r\n# Driver code\r\n# given list\r\ngivenlist = [\"Hello\", \"Btech\", \"Geeks\", \"is\", \"new\", \"online\"]\r\n# passing list to remove first element\r\nprint(removeFirstElement(givenlist))\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>['Btech', 'Geeks', 'is', 'new', 'online']<\/pre>\n<h3 id=\"Using_pop()_function\">&gt;Method #3:Using pop() function<\/h3>\n<p>The list class in Python has a function called pop(index), which takes an optional argument index and deletes the element at that index. If no justification is given, it deletes the last element of the list by default.<\/p>\n<p>The index of first element in list is 0.<\/p>\n<p>Below is the implementation:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Function which removes first element\r\ndef removeFirstElement(givenlist):\r\n    # using pop function\r\n    givenlist.pop(0)\r\n    # return the result list\r\n    return givenlist\r\n\r\n\r\n# Driver code\r\n# given list\r\ngivenlist = [\"Hello\", \"Btech\", \"Geeks\", \"is\", \"new\", \"online\"]\r\n# passing list to remove first element\r\nprint(removeFirstElement(givenlist))\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>['Btech', 'Geeks', 'is', 'new', 'online']<\/pre>\n<h3 id=\"Using_remove()_function\">&gt;Method #4:Using remove() function<\/h3>\n<p>The list class in Python has a function remove(value) that deletes the first occurrence of a given value from the list. This can be used to remove the first item from the list. Select the first element from the list and pass it to the remove() function to accomplish this.<\/p>\n<p>Below is the implementation:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Function which removes first element\r\ndef removeFirstElement(givenlist):\r\n    # getting first element of the given list\r\n    firstelement = givenlist[0]\r\n    # using remove function\r\n    givenlist.remove(firstelement)\r\n    # return the result list\r\n    return givenlist\r\n\r\n\r\n# Driver code\r\n# given list\r\ngivenlist = [\"Hello\", \"Btech\", \"Geeks\", \"is\", \"new\", \"online\"]\r\n# passing list to remove first element\r\nprint(removeFirstElement(givenlist))\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>['Btech', 'Geeks', 'is', 'new', 'online']<\/pre>\n<h3 id=\"Using_deque()_function\">&gt;Method #5:Using deque() function<\/h3>\n<p>A double-ended queue, or deque, allows you to add and remove elements from either end. The Deque module is a collection library module. It has methods for adding and removing elements that can be directly invoked with arguments.<\/p>\n<p>Convert the given list to a deque and then pop an element from the left. Then add the remaining deque elements to the list.<\/p>\n<p>Below is the implementation:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">from collections import deque\r\n# Function which removes first element\r\n\r\n\r\ndef removeFirstElement(givenlist):\r\n    # converting given list to deque\r\n    dequelist = deque(givenlist)\r\n    # using popleft function to remove first element\r\n    dequelist.popleft()\r\n    # Converting deque to list\r\n    givenlist = list(dequelist)\r\n    # return the result list\r\n    return givenlist\r\n\r\n\r\n# Driver code\r\n# given list\r\ngivenlist = [\"Hello\", \"Btech\", \"Geeks\", \"is\", \"new\", \"online\"]\r\n# passing list to remove first element\r\nprint(removeFirstElement(givenlist))\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>['Btech', 'Geeks', 'is', 'new', 'online']<\/pre>\n<p><strong>Related Programs<\/strong>:<\/p>\n<ul>\n<li><a href=\"https:\/\/python-programs.com\/python-remove-last-element-from-a-list\/\">python remove last element from a list<\/a><\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-how-to-remove-duplicates-from-a-list\/\">python how to remove duplicates from a list<\/a><\/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<\/a><\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-remove-elements-from-a-list-while-iterating\/\">python remove elements from a list while iterating<\/a><\/li>\n<li><a href=\"https:\/\/python-programs.com\/how-to-remove-elements-from-a-list-based-on-the-given-condition\/\">how to remove elements from a list based on the given condition<\/a><\/li>\n<li><a href=\"https:\/\/python-programs.com\/remove-duplicate-elements-from-a-sorted-singly-linked-list\/\">remove duplicate elements from a sorted singly linked list<\/a><\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-program-to-create-a-list-of-tuples-with-the-first-element-as-the-number-and-second-element-as-the-square-of-the-number\/\">python program to create a list of tuples with the first element as the number and second element as the square of the number<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A list is used in Python to store the sequence of different types of data. Python lists are mutable, which means that their elements can be changed after they have been created. Python, on the other hand, has six data types that can be used to store sequences, with the first two on the list &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-remove-first-element-from-a-list\/\"> <span class=\"screen-reader-text\">Python: Remove First Element from a List<\/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 First Element from a List - 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-first-element-from-a-list\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python: Remove First Element from a List - Python Programs\" \/>\n<meta property=\"og:description\" content=\"A list is used in Python to store the sequence of different types of data. 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