from typing import List


def split_parts(key) -> List[str]:
    """
    Split s3 key parts using "/" delimiter.

    Example::

        >>> split_parts("a/b/c")
        ["a", "b", "c"]
        >>> split_parts("//a//b//c//")
        ["a", "b", "c"]

    .. versionadded:: 1.0.1
    """
    return [part for part in key.split("/") if part]