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 __add_fuzzing_range(self):
        start = self.ui.sBAddRangeStart.value()
        end = self.ui.sBAddRangeEnd.value()
        step = self.ui.sBAddRangeStep.value()
        self.fuzz_table_model.add_range(start, end + 1, step)