While I have no specific opinion on tarfile, I strongly disagree with a blanket prohibition on 'from None'.  Its proper use is to maintain a defined API and hide irrelevant implementation details.  Realistic toy example:

def f(x, y):
    "Return (x+y)/y for non-zery y."

    if y == 0:  # Body 1: look ahead.
        raise ValueError('y cannot be 0')
    else:
        return (x+y)/y
# or
    try:  # Body 2: leap first.
        return (x+y)/y
    except ZeroDivisionError:
        raise ValueError('y cannot be 0') from None

'from e' instead of 'from None' would just add distracting noise.