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 remove_duplicates(self):
        if self.ui.chkBRemoveDuplicates.isChecked():
            for lbl in self.message.message_type:
                seq = lbl.fuzz_values[:]
                seen = set()
                add_seen = seen.add
                lbl.fuzz_values = [l for l in seq if not (l in seen or add_seen(l))]