def load(self, requirements_file=None):
        """Load or reload requirements from a requirements.txt file.

        :param requirements_file: if not given, the filename used from
            initialization will be read again.
        """
        if requirements_file is None:
            requirements_file = self.filename
            if requirements_file is None:
                raise ValueError("no filename provided")
        elif isinstance(requirements_file, text_type):
            requirements_file = Path(requirements_file)
        self.clear()
        with requirements_file.open() as f:
            self.loads(f.read())

        if isinstance(requirements_file, (text_type, Path)):
            self.filename = requirements_file
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)