具有多个值的属性设置器

如何将两个值传递给设置器？

您可以将iterable（元组，列表）传递给setter，例如：

class A(object):    def __init__(self, val):        self.idx = val    @property        def idx(self):        return self._idx    @idx.setter    def idx(self, val):        try: value1, value2 = val        except ValueError: raise ValueError("Pass an iterable with two items")        else: """ This will run only if no exception was raised """ self._idx = sha512(value1+value2)

演示：

>>> a = A(['foo', 'bar'])     #pass a list>>> b = A(('spam', 'eggs'))   #pass a tuple>>> a.idx<sha512 HASH object @ 0xa57e688>>>> a.idx = ('python', 'org')  #works>>> b.idx = ('python',)         #failsTraceback (most recent call last):    ...    raise ValueError("Pass an iterable with two items")ValueError: Pass an iterable with two items