def _check_not_in(obj, string):
    """
    The 'i' substring of the list 'obj' must not be in 'string
    :param obj: list of substring
    :param string: element that needs to be checked
    :return: False if a 'obj' substring is contained in 'string', True otherwise
    """
    for i in obj:
        if i in string:
            return False
    return True