python (static, combinations, inherited)

Static properties

@Property with behavior modification class into the class behavior attribute class, there are the role of the package

example.

# -*- coding: utf-8 -*-
class Room:
    def __init__(self,name,owner,width,length,heigh):
        self.Name=name
        self.Owner=owner
        self.Width=width
        self.Length=length
        self.Heigh=heigh
    # Class into the behavior of the attribute class, an encapsulation effect
    @property
    def cal_area(self):
        return self.Length*self.Width

= Room Room1 ( '102', 'Alex', 10,10,3) 
# not called before adding @property
# s=room1.cal_area()
# print(s)

room2=Room('103','alex',10,5,3)
# s2=room2.cal_area()
Print # (s2) 
# after the call to add @property
s1=room1.cal_area
print(s1)
s2=room2.cal_area
print(s2)

Method (in the absence of the class method calls the class instantiation case) class

@classmethod

# -*- coding: utf-8 -*-
class Room:
    tag=1
    def __init__(self,name,owner,width,length,heigh):
        self.Name=name
        self.Owner=owner
        self.Width=width
        self.Length=length
        self.Heigh=heigh

    def cal_area(self):
        return self.Length*self.Width

    @classmethod
    def info(cls):
        print ( 'I am a class method')
        
Room.info()

Static method

@staticmethod

Static method name only a home-based management, can not use the class variables and instance variables is based toolkit

# -*- coding: utf-8 -*-
class Room:
    tag=1
    def __init__(self,name,owner,width,length,heigh):
        self.Name=name
        self.Owner=owner
        self.Width=width
        self.Length=length
        self.Heigh=heigh

    def cal_area(self):
        return self.Length*self.Width

    @classmethod
    def info(cls):
        print ( 'I am a class method')

    @staticmethod
    def live(a,b):
        print ( '% s% s by households and'% (a, b))
# Class calls
Room.live('alex','bob')
Examples of call #
room1=Room('102','alex',10,10,3)
room1.live('alex','bob')

Summary: @property and only instance bindings (both static property can access an instance property, they can access the class attribute), @ classmethod only bind the class (class methods can only access the class attribute), @ staticmethod classes and instances can be (class class attributes neither method nor instance attributes)