标签：test init 数据 hello 实例化 name role wal 构造
os.system 输出命令结果到屏幕，返回命令执行状态
os.popen（"dir"）.read()#会保存命令的执行结果输出
py2.7
commands
commands.getstatusoutput("dir")
#windows不好用
#linux可以
subprocess
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面向对象
模板造对象
一.类的特性
1.封装
防止数据被随意修改
使外部程序不需要关注对象内部的构造（逻辑结构)，只需要通过此对象对外提供的接口进行直接访问即可
1 class Dog(object): 2 3 def __init__(self,name,food):#构造函数，构造方法，==初始化方法 4 self.NAME = name 5 self.FOOD = food 6 self.__getj = ‘big‘ 7 self.__test = ‘123‘ 8 def sayhi(self):#类的方法（类的具体方法） 9 print("hello,ni shuo de dui.",self.NAME) 10 def get_getj(self): 11 return self.__getj 12 def eat(self): 13 print("%s is eating %s"%(self.NAME,self.FOOD)) 14 def __del__(self): 15 print("del...run....") 16 17 18 d = Dog("a1",‘haochide‘)#Dog(d,"a1") #实例化后产生的对象叫实例（当前类的实例） 19 d2 = Dog("a2",‘pi‘) 20 21 d.sayhi() 22 d2.sayhi() 23 d.eat() 24 d2.eat() 25 print(d.get_getj()) 26 27 print(d._Dog__test) 28 29 def shot2(): 30 print("buhuia") 31 32 d.sayhi = shot2 33 d.sayhi() 34 # print(d.test)
2.继承
通过父类---》子类的方式 实现不同角色的共同点和不同点 以最小代码量的方式实现
类 ----》实例化----》实例对象
__init__构造函数
self.name = name #属性，成员变量，字段
def sayhi（） #方法，动态属性
公有属性
在类里定义的属性，任何对象都可以访问
私有属性
__private_attr_name = value
def get_heart(self) #对外部提供只读访问接口
return self.__heart
r1._Role__heart 强制访问私有属性
析构方法
继承
多继承
1 class Person(object): 2 def __init__(self,name,age): 3 self.name = name 4 self.age = age 5 self.sex = ‘male‘ 6 7 def talk(self): 8 print("person is talk",self.name) 9 10 11 class BlackPerson(Person): 12 def __init__(self,name,age): 13 Person.__init__(self,name,age) 14 print(self.sex) 15 16 def walk(self): 17 print("is walk") 18 19 20 21 b = BlackPerson(‘liusijia‘,10) 22 b.talk()
新式类vs经典类
SchoolMember.__init__(self,name,age,sex) #经典类写法
super(Teacher,self).__init__(name,age,sex)#新式类写法
class Person(object):
super(Person)
class Person:#经典类
ParentClass.__init__
1 class SchoolMember(object): 2 ‘‘‘学校成员基类‘‘‘ 3 member = 0 4 def __init__(self,name,age,sex): 5 self.name = name 6 self.age = age 7 self.sex = sex 8 self.enroll() 9 def enroll(self): 10 ‘‘‘注册‘‘‘ 11 print("just encolled a new school member %s"%self.name) 12 SchoolMember.member +=1 13 14 def tell(self): 15 ‘‘‘个人信息‘‘‘ 16 print(‘------info:%s-----‘%self.name) 17 for k,v in self.__dict__.items(): 18 print(‘\t‘,k,v) 19 def __del__(self): 20 print("开除[%s]..."%self.name) 21 SchoolMember.member -=1 22 23 class School(object): 24 ‘‘‘学校类‘‘‘ 25 def open_branch(self,addr): 26 print("openning branch in %s"%addr) 27 self.addr = "" 28 29 class Teacher(SchoolMember,School): 30 ‘‘‘讲师类‘‘‘ 31 def __init__(self,name,age,sex,salary,course): 32 SchoolMember.__init__(self,name,age,sex) #经典类写法 33 super(Teacher,self).__init__(name,age,sex)#新式类写法 34 35 self.salary = salary 36 self.course = course 37 # self.enroll() 38 39 def teaching(self): 40 print("Teacher[%s]is teaching[%s]"%(self.name,self.course)) 41 42 class Student(SchoolMember): 43 def __init__(self,name,age,sex,course,tuition): 44 SchoolMember.__init__(self,name,age,sex) 45 self.course = course 46 self.tuition = tuition 47 self.amount = 0 48 49 def pay_tuition(self,amount): 50 print("student[%s]has just paied [%s]"%(self.name,amount)) 51 self.amount += amount 52 53 t1 = Teacher("a1",11,"F*M",3000,"python") 54 s1 = Student("a2",14,"NA","py",3000) 55 s2 = Student("a3",13,"NA","py",3000) 56 57 print(SchoolMember.member) 58 59 60 del s1 61 print(SchoolMember.member) 62 63 t1.tell() 64 s2.tell()
3.多态
静态方法
类方法
属性方法
标签：test init 数据 hello 实例化 name role wal 构造
原文地址：http://www.cnblogs.com/heshaochuan/p/6103574.html
