问题
I was under the impression it was possible to overload and in Python, but reading through the docs just now, I realized that __and__ refers to the bitwise & operator, not logical and.
Am I overlooking something, or is it not possible to overload logical and in Python?
回答1:
No this is not possible. There is a proposal that adds this functionality but for now, it is rejected.
回答2:
No, it is not possible. See here.
回答3:
There is no straight way to do this. You could override __nonzero__ for your objects to modify their truth value.
class Truth:
def __init__(self, truth):
self.truth = truth
def __nonzero__(self):
return self.truth
t = Truth(True)
f = Truth(False)
print bool(t and t)
print bool(t and f)
print bool(f and f)
来源：https://stackoverflow.com/questions/32311518/is-it-possible-to-overload-logical-and-in-python