360     def _op(self, f, block=None, off=None, size=None):  argument
364             if off is None:
365                 off, size = 0, self.size
367                 off, size = 0, off
371                 size=max(self.size, off+size),
375             start = (block*self.size + off) / (self.size*self.count)
376             stop = (block*self.size + off+size) / (self.size*self.count)
386     def read(self, block=None, off=None, size=None):  argument
387         self._op(Block.read, block, off, size)
389     def prog(self, block=None, off=None, size=None):  argument
390         self._op(Block.prog, block, off, size)
392     def erase(self, block=None, off=None, size=None):  argument
393         self._op(Block.erase, block, off, size)
395     def clear(self, block=None, off=None, size=None):  argument
396         self._op(Block.clear, block, off, size)
570         off=(None,None),  argument
622     off_start = off[0]
623     off_stop = off[1] if len(off) > 1 else off[0]+1
731             off = int(m.group('read_off'), 0)
738                 if off >= off_stop:
740                 size = min(size, off_stop-off)
741             off -= off_start
743             bd.read(block, off, size)
748             off = int(m.group('prog_off'), 0)
755                 if off >= off_stop:
757                 size = min(size, off_stop-off)
758             off -= off_start
760             bd.prog(block, off, size)
772             off = -off_start
774             bd.erase(block, off, size)