def coerce(cls, string):
        """Create a :class:`Requirement` object from a given package spec."""
        match = re.match(cls.spec_regex, string)
        if not match:
            raise InvalidRequirementSpecError("could not parse requirement")
        package = match.group(1)
        if all(match.group(2, 3)):
            version = "".join(match.group(2, 3))
        else:
            version = None
        return cls(package, version)
def on_combo_box_fuzzing_label_current_index_changed(self, index: int):
        self.fuzz_table_model.fuzzing_label = self.current_label
        self.fuzz_table_model.update()
        self.update_message_data_string()
        self.ui.tblFuzzingValues.resize_me()

        self.ui.spinBoxFuzzingStart.blockSignals(True)
        self.ui.spinBoxFuzzingStart.setValue(self.current_label_start + 1)
        self.ui.spinBoxFuzzingStart.blockSignals(False)

        self.ui.spinBoxFuzzingEnd.blockSignals(True)
        self.ui.spinBoxFuzzingEnd.setValue(self.current_label_end)
        self.ui.spinBoxFuzzingEnd.blockSignals(False)