Python中的抽象方法 [英] Abstract methods in Python
问题描述
我在使用 Python 继承时遇到问题.虽然这个概念在 Java 中对我来说似乎太容易了,但到目前为止我一直无法在 Python 中理解,这至少让我感到惊讶.
我有一个原型如下:
class Shape():def __init__(self, shape_name):self.shape = shape_name类矩形(形状):def __init__(self, name):self.shape = 名称
在上面的代码中,如何创建一个需要为所有子类实现的抽象方法?
沿着这些方向,使用 ABC
导入 abc类形状(对象):__元类__ = abc.ABCMeta@abc.abstractmethoddef method_to_implement(self, input):"""方法文档"""返回
另请阅读此优秀教程:http://www.doughellmann.com/PyMOTW/abc/>
您还可以查看 zope.interface,它在 Python 中引入 ABC 之前使用过.
I am having trouble in using inheritance with Python. While the concept seems too easy for me in Java yet up till now I have been unable to understand in Python which is surprising to me at least.
I have a prototype which follow:
class Shape():
def __init__(self, shape_name):
self.shape = shape_name
class Rectangle(Shape):
def __init__(self, name):
self.shape = name
In the above code how can I make an abstract method that would need to be implemented for all the subclasses?
Something along these lines, using ABC
import abc
class Shape(object):
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
def method_to_implement(self, input):
"""Method documentation"""
return
Also read this good tutorial: http://www.doughellmann.com/PyMOTW/abc/
You can also check out zope.interface which was used prior to introduction of ABC in python.
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