def select_left(self, sheets, window, closed_index, fallback=True):
        """Ensure focus of view to the left of closed view."""

        selected = False
        if len(sheets) >= closed_index:
            Focus.defer(window, sheets[1 - closed_index])
            selected = True
        if not selected and fallback:
            selected = self.select_right(sheets, window, closed_index, False)
        return selected


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# Wrappers
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dataset/ETHPy150Open facelessuser/TabsExtra/tabs_extra.py/TabsExtraListener.select_left/swapped operands of `-`