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python中的定义：
@classmethod : 类方法
@staticmethod : 静态方法
类方法和静态方法的调用一样，都是通过类就可以直接调用。
区别：类方法，需要传入该类，定义类方法的时候要传一个默认的参数cls。静态方法则不用。
示例：
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#!/usr/bin/env python# -*- coding: utf-8 -*-# blog.ithomer.netclass Test(object): x = 11 def __init__(self, _x): self._x = _x print("Test.__init__") @classmethod def class_method(cls): print("class_method") @staticmethod def static_method(): print("static_method") @classmethod def getPt(cls): cls.class_method() cls.static_method() if "__main__" == __name__: Test.class_method() # class_method Test.static_method() # static_method Test.getPt() # class_method static_method t = Test(22) # Test.__init__ t.class_method() # class_method t.static_method() # static_method print Test.x # 11# print Test._x print t.x # 11 print t._x # 22 # t.getPr() # ‘Test‘ object has no attribute ‘getPr‘ |
运行结果：
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class_methodstatic_methodclass_methodstatic_methodTest.__init__class_methodstatic_method111122Traceback (most recent call last): File "/home/homer/workspace/myPython/com/connmiliao.py", line 40, in <module> t.getPr() AttributeError: ‘Test‘ object has no attribute ‘getPr‘</module> |
示例：@property,@staticmethod,@classmethod
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#!/usr/bin/env python# -*- coding: utf-8 -*-# blog.ithomer.netclass MyClass(object): def __init__(self): print ‘__init__‘ self._name = ‘blog.ithomer.net‘ @staticmethod def static_method(): print ‘This is a static method!‘ def test(self): print ‘call test‘ @classmethod def class_method(cls): print ‘cls: ‘,cls print ‘cls.name: ‘,cls.name print ‘cls.static_method(): ‘,cls.static_method() instance = cls() print ‘instance.test(): ‘,instance.test() @property def name(self): return self._name @name.setter def name(self, value): self._name = valueif __name__ == ‘__main__‘: MyClass.static_method() MyClass.class_method() mc = MyClass() print mc.name mc.name = ‘forum.ithomer.net‘ print mc.name |
运行结果：
This is a static method!
cls: <class ‘__main__.myclass‘="">
cls.name:
cls.static_method(): This is a static method!
None
__init__
instance.test(): call test
None
__init__
blog.ithomer.net
forum.ithomer.net
python -- @classmethod @staticmethod区别和使用
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原文地址：http://www.cnblogs.com/sunshine2016/p/5740578.html
