Your task is to swap elements of the list (Iterable) pairwise. If you are given a list of 4 elements, then your function should return the same list, only in it the first and second elements are interchanged, as well as the third and fourth.
If there isn’t a paired amount of elements, then leave the last unpaired element in its place. An empty list should remain empty.
swap_nodes([1, 2, 3, 4]) == [2, 1, 4, 3] swap_nodes([5, 5, 5, 5]) == [5, 5, 5, 5]
CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin --ff
checkio install-plugin --chromium