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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def gen_part_from_line(lines: Iterable[str], part_index: int, splitter: str = None) -> Generator[str, None, None]: """ Splits lines with ``splitter`` and yields a specified part by index. Args: lines: iterable of strings part_index: index of part to yield splitter: string to split the lines on Yields: the specified part for each line """

    for line in lines:
        parts = line.split(splitter)
        yield parts[part_index]