def redraw(self):
        self._screendirty = [[True] * self.height for i in range(self.width)]
        self.update()
Return the next possible channel id.  Is a circular enumeration.
dataset/ETHPy150Open asweigart/pygcurse/pygcurse/__init__.py/PygcurseSurface.redraw--crossover with--dataset/ETHPy150Open agoragames/haigha/haigha/connection.py/Connection._next_channel_id