def transform_strings_to_lists(pd_series):
    """
    Turns values from pd_series from |-delimited strings to lists
    :param pd_series:
    :return list of lists:
    """
    values_as_strings = pd_series.dropna().values.astype(str)
    values_as_lists = [item.split('|') for item in values_as_strings]
    return values_as_lists