本文介绍了如何扩展 Python 类初始化的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!
问题描述
我已经创建了一个基类:
I have created a base class:
class Thing():
def __init__(self, name):
self.name = name
我想扩展类并添加到 init 方法中,以便 SubThing
同时具有 name
和 time
属性.我该怎么做?
I want to extend the class and add to the init method so the that SubThing
has both a name
and a time
property. How do I do it?
class SubThing(Thing):
# something here to extend the init and add a "time" property
def __repr__(self):
return '<%s %s>' % (self.name, self.time)
任何帮助都会很棒.
推荐答案
可以在子类中定义__init__
,调用super
来调用父类的__init__
适当的方法:
You can just define __init__
in the subclass and call super
to call the parents' __init__
methods appropriately:
class SubThing(Thing):
def __init__(self, *args, **kwargs):
super(SubThing, self).__init__(*args, **kwargs)
self.time = datetime.now()
确保你的基类是 object
的子类,因为 super
不适用于旧式类:
Make sure to have your base class subclass from object
though, as super
won't work with old-style classes:
class Thing(object):
...
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