Calculate the hint for a line from a griddler image

griddler.py

import typing


def griddler_line_hint(line: typing.Sequence[int]) -> typing.Iterator[int]:
    """
    Creates the hint for griddlers for the given line
    >>> list(griddler_line_hint([1, 1, 1]))
    [3]
    >>> list(griddler_line_hint([1, 1, 0, 1, 1]))
    [2, 2]
    >>> list(griddler_line_hint([1, 1, 0, 0]))
    [2]
    >>> list(griddler_line_hint([]))
    []
    """
    if not line:
        return
    try:
        next_blank = line.index(0)
        yield next_blank
        try:
            line_starting_from_blank = line[next_blank + 1 :]
            next_filled_in_square = line_starting_from_blank.index(1)
            yield from griddler_line_hint(
                line_starting_from_blank[next_filled_in_square:]
            )
        except ValueError:
            return
    except ValueError:
        yield len(line)