def compiled_sub_dn(self, prepend):
        """
        Returns:
            str: A DN with the DN Base appended to the end.

        Args:
            prepend (str): The dn to prepend to the base.
        """
        prepend = prepend.strip()
        if prepend == '':
            return self.config.get('LDAP_BASE_DN')
        return '{prepend},{base}'.format(
            prepend=prepend,
            base=self.config.get('LDAP_BASE_DN')
        )
Returns:
            str: A DN with the DN Base appended to the end.

        Args:
            prepend (str): The dn to prepend to the base.