I have a list, and I'd like to pick out certain values from that list. The values I want to pick out are the ones whose indexes in the list are specified in another list. For example: indexes = [2, 4, 5] main_list = [0, 1, 9, 3, 2, 6, 1, 9, 8] the output would be: [9, 2, 6] (i.e., the elements with indexes 2, 4 and 5 from main_list).

Mar 18, 2023 · Given two lists with elements and indices, write a Python program to find elements of list 1 at indices present in list 2. Examples: Input : lst1 = [10, 20, 30, 40, 50] lst2 = [0, 2, 4] Output : [10, 30, 50] Explanation: Output elements at …

How do I explicitly pick out items whose indices have no specific patterns? For example, I want to select [0,2,3]. Or from a very big list of 1000 items, I want to select [87, 342, 217, 998, 500]. Is there some Python syntax that does that? Something that …

Jul 5, 2010 · good_indices = [ index for index, item in enumerate(good_objects) if item ] This iterates through each item in good_objects (while remembering its index with enumerate) and returns only the indices where the item is true.

Dec 3, 2024 · When working with lists in Python, we often need to extract specific elements. The easiest way to extract an element from a list is by using its index. Python uses zero-based indexing, meaning the first element is at index 0. Other methods that we can use to extract elements from list are:

Apr 16, 2024 · To select a subset from a list based on a given set of indices, we can use list comprehension along with the enumerate() function. In the above code, the lst parameter represents the original list, and the indices parameter represents the …

Dec 29, 2021 · Extract Elements From A Python List Using Index. Here in this first example, we created a list named ‘firstgrid’ with 6 elements in it. The print statement prints the ‘1’ element in the index. 2. Print Items From a List Using Enumerate. Here, we created a variable named ‘vara’ and we filled the elements into the list.

In this article, we have explored different techniques to pick specific items from a Python list by index in Python 3. By understanding how indexing works in Python lists and utilizing slicing and negative indices, you can efficiently extract the desired items from a list.

Oct 1, 2024 · Learn how to select items from a list in Python with various methods, including indexing, slicing, and conditions. Enhance your Python skills with practical examples and tips.

Dec 2, 2018 · Python list slicing is fundamental concept that let us easily access specific elements in a list. In this article, we’ll learn the syntax and how to use both positive and negative indexing for slicing with examples. Example: Get the items from a list starting at position 1 and ending at position 4