def get_by_path(obj, path):
    """
    Iteratively get on obj for each key in path.

    :param (list|dict) obj: The top-level object.
    :param (tuple[str]|tuple[int]) path: Keys to access parts of obj.

    :return: (*)

    Example:

        >>> figure = {'data': [{'x': [5]}]}
        >>> path = ('data', 0, 'x')
        >>> get_by_path(figure, path)
        [5]
    """
    for key in path:
        obj = obj[key]
    return obj
