[Tut] Python One-Liners – The Ultimate Collection

Python One-Liners – The Ultimate Collection

This resource is meant to be the ultimate collection of Python One-Liners. If you have an idea for a one-liner to be published here, send me a message at chris (at) finxter.com.

Find All Indices of an Element in a List

Say, you want to do the same as the list.index(element) method but return all indices of the element in the list rather than only a single one.

In this one-liner, you’re looking for element 'Alice' in the list [1, 2, 3] so it even works if the element is not in the list (unlike the list.index() method).

lst = [1, 2, 3]

indices = [i for i in range(len(lst)) if lst[i]=='Alice']

index = indices[0] if indices else None

print(index)

https://www.sickgaming.net/blog/2020/03/...ollection/