def __add__(self, bs):
s = Bits.__add__(self, bs)
s._pos = 0
return s
def rfind(self, bs, start=None, end=None, bytealigned=None):
t = Bits.rfind(self, bs, start, end, bytealigned)
if t:
self._pos = t[0]
return t
def _clear(self):
Bits._clear(self)
self._pos = 0
