def backspace(self):
        if self.cursor == 0:
            return
        self.cursor -= 1
        self.updateerasebuffersize()
        del self.buffer[self.cursor]
Return True iff this computer has a soundcard.
dataset/ETHPy150Open asweigart/pygcurse/pygcurse/__init__.py/PygcurseInput.backspace--crossover with--dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/test/test_winsound.py/_have_soundcard