Shared via CrossHair Playground

main.py

from typing import List

def csv_last_column(lines: List[str]) -> List[str]:
    '''
    Gets you the last column from a csv.
    We use CrossHair to confirm our index arithmetic is correct.
    
    pre: all(',' in line for line in lines)
    post: __return__ == [line.split(',')[-1] for line in lines]
    '''
    return [line[line.rindex(',') + 1:] for line in lines]