def leftarrow(self):
        if self.cursor > 0:
            self.cursor -= 1
Compute a label from the non-zero sources in an stc object.
dataset/ETHPy150Open asweigart/pygcurse/pygcurse/__init__.py/PygcurseInput.leftarrow--crossover with--dataset/ETHPy150Open mne-tools/mne-python/mne/label.py/stc_to_label