The problem with code formatters for Python is that you can't just break lines using whitespace; you need to insert symbols, ideally parentheses. For example, if you need to break this line of code:

     left[first][second] = right[first][second][third]

Manual breaking looks like this:

    left[first][second] = (
        ‎right[first][second]
            [third]
    )

Code formatters will produce something like the following atrocity:

    left[first][second
        ‎] = right[first][second][
        third]

Comments and strings are also unwrappable if the formatter is afraid of inserting characters.