[Tut] Python One-Liners – The Ultimate Collection

[xSicKxBot]

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

Code:

'Alice'

in the list

Code:

[1, 2, 3]

so it even works if the element is not in the list (unlike the

Code:

list.index()

method).

Code:

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)