def remove(self, elem):
        """Remove a requirement.

        :param elem: a string or :class:`Requirement` instance.
        """
        if isinstance(elem, text_type):
            for requirement in self:
                if requirement.package == elem:
                    return super(Requirements, self).remove(requirement)
        return super(Requirements, self).remove(elem)
def _deDuplicate(results):
        found = dict()
        deDuped = list()
        for entry in results:
            dn = entry.get("dn")
            if not dn in found:
                found[dn] = 1
                deDuped.append(entry)

        return deDuped