Someone
public text v1 · immutable>>> class C(int):
... def __and__(s,o):
... print 'and'
... print s, o
... return s.__class__(5)
... __rand__ = __and__
...
>>> C(0) and C(1)
0
>>> class C(int):
... def __and__(s,o):
... print 'and'
... print s, o
... return s.__class__(5)
... __rand__ = __and__
...
>>> C(0) and C(1)
0