def is_missing_lists(list1, list2):

    """Function:  is_missing_lists

    Description:  Compares two lists and returns a list of missing values from
        list1 not found in list2.

    Arguments:
        (input) list1 -> List 1.
        (input) list2 -> List 2.
        (output) Return list of missing values.

    """

    list1 = list(list1)
    list2 = list(list2)

    return [item for item in list1 if item not in list2]