物件

#!/usr/bin/python
#coding:utf-8

class Dog:
    weight = 5
    age = 1.5
    def __init__(self):
        self.weight = 1
        self.name = "gou"

    def run(self):
        self.weight = 4

#構造物件
xiaoGou = Dog()
#呼叫屬性
print xiaoGou.weight
print xiaoGou.age
print xiaoGou.name
#新增屬性
xiaoGou.color = "red"
 

print xiaoGou.color

xiaoGou.color = "green"
print xiaoGou.color

xiaoGou.run()
print xiaoGou.weight
################
print "------------"
class Person:
    # name = "xx"
    def __init__(self,pName):
        self.name = pName

    def __str__(self):
        return "哈哈。。。"

person = Person("person"
 
)
print person.name
print person

輸出如下：

E:\python\python_jdk\python.exe E:/python/py_pro/safly/Python_Demo.py
1
1.5
gou
red
green
4
------------
person
哈哈。。。

Process finished with exit code 0

私有屬性

#!/usr/bin/python
#coding:utf-8

class Person(object):
    def __init__(self,name,age):
        self.name = name
        self.__age = age

    def
 
 setNewAge(self,newAge):
        self.__age = newAge

    def getNewAge(self):
        return  self.__age

    def __str__(self):
        return "年齡:"+str(self.__age)

person = Person("person",11)
print  person.name

person.setNewAge(19)
print person.getNewAge()

personTemp = person
print id(person) == id(personTemp)

print "--NameError: name 'person' is not defined-----"
del person
# print  person

輸出如下：

E:\python\python_jdk\python.exe E:/python/py_pro/safly/SaflyDemo.py
person
19
True
--NameError: name 'person' is not defined-----

Process finished with exit code 0

繼承、私有方法

#!/usr/bin/python
#coding:utf-8

class Person(object):
    def __init__(self,name,age):
        self.name = name
        self.__age = age

    ####私有屬性####
    def setNewAge(self,newAge):
        self.__age = newAge

    ####私有方法####
    def __getNewAge(self):
        return  self.__age

########呼叫私有方法#######
    def getNewAge(self):
        return self.__getNewAge()


class XiaoMing(Person):
    ########覆蓋父類構造方法#######
    def __init__(self):
        self.sex = 1

person = Person("person",111)
#####呼叫非私有方法#######
print person.getNewAge()

xiaoming = XiaoMing()
#####呼叫父類方法###
xiaoming.setNewAge(11)
print xiaoming.getNewAge()

print "-----XiaoMing' object has no attribute '__age'-----"
# print xiaoming.__age

輸出如下：

E:\python\python_jdk\python.exe E:/python/py_pro/safly/SaflyDemo.py
111
11
-----XiaoMing' object has no attribute '__age'-----

Process finished with exit code 0

重寫方法

#!/usr/bin/python
#coding:utf-8
class Animal(object):
    def sing(self):
        print "啊啊啊啊"
    def run(self):
        print "animal run"

class Dog(Animal):
    def sing(self):
        print "汪汪汪"
    def run(self):
        Animal.run(self)
        super(Dog, self).run()
        # super().run()  3.xx的特性
        print "dog run"

dog = Dog()
dog.sing()
dog.run()

輸出如下：

E:\python\python_jdk\python.exe E:/python/py_pro/safly/SaflyDemo.py
汪汪汪
animal run
animal run
dog run

Process finished with exit code 0

多重繼承

#!/usr/bin/python
#coding:utf-8
class A(object):
    def testA(self):
        print "---A a---"

class B(object):
    def testB(self):
        print "---B b----"

    def testA(self):
        print "---B a---"

class C(A,B):
    pass
class D(B,A):
    pass
c = C()
c.testA()
c.testB()
print "---------------"
d = D()
d.testA()
d.testB()

輸出如下：

E:\python\python_jdk\python.exe E:/python/py_pro/safly/SaflyDemo.py
---A a---
---B b----
---------------
---B a---
---B b----

Process finished with exit code 0