WebSequential deleting is a bad idea since deletion in a list is O (n). Instead do something like this: def delete_rand_items (items,n): to_delete = set (random.sample (range (len (items)),n)) return [x for i,x in enumerate (items) if not i in to_delete] Share Improve this answer Follow answered Jul 3, 2024 at 11:08 John Coleman 51.1k 7 52 117 WebSep 18, 2024 · How to remove a sublist from an ArrayList in Java? Using the removeRange method () 1 Inherit the ArrayList class (from your class) using the extends keyword. 2 …
remove sublist from a single list of list python - Stack Overflow
WebNov 25, 2015 · So, assuming that you want an empty list returned if you get an empty list, here's an example solution: from random import shuffle def get_random_sublist (the_dict, key, number): l = the_dict.get (key, []) shuffle (l) return l [:number] So, I'd use random.shuffle. WebAug 31, 2024 · 1 Here are two ways to achieve the results you want. mylist = [ ['A', '123'], ['A', '456'], ['B','847'], ['B','677']] letter = 'A' # Using list comprehension print ( [l for l in mylist if l [0] == letter]) # Using filer function print (list (filter (lambda l: l [0] == letter, mylist))) Share Improve this answer Follow coffee bar central ave cedarhurst
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WebJan 18, 2024 · Method 1: Using subList () and clear () method Syntax: List.subList (int fromIndex, int toIndex).clear () Example: // Java code to remove a subList using // subList (a, b).clear () method import java.util.*; public class AbstractListDemo { public static void main (String args []) { // Creating an empty AbstractList AbstractList WebHere the underscore(_) ignores the last value and finally assigns it to the list.. It is important to note that using lst = lst[:-1] does not really remove the last element from the list, but … WebMar 2, 2024 · The remove () method removes an item from a list by its value and not by its index number. The general syntax of the remove () method looks like this: … calypso entertainment gmbh