擅长:python、mysql、java
<p>您最好使<code>intToTime</code>和<code>timeToInt</code>模块级函数与您的类<code>Time</code>相同级别,并按如下方式实现<code>__add__</code>:</p>
<pre><code>def __add__(self, num):
if isinstance(num, Time):
num=timeToInt(num)
elif not isinstance(num, int):
raise TypeError, 'num should be an integer or Time instance'
return intToTime(timeToInt(self)+num)
</code></pre>