擅长:python、mysql、java
<p>将<code>__add__</code>方法添加到<code>FakeDate()</code>类:</p>
<pre><code>class FakeDate(datetime.date):
@classmethod
def today(cls):
return cls(1999, 12, 31)
def __add__(self, other):
res = super(FakeDate, self).__add__(other)
return type(self)(res.year, res.month, res.day)
</code></pre>
<p>演示:</p>
^{pr2}$
<p>{{cd2>我们只需添加一个实例就可以了。在</p>