Python入门之面向对象之类继承与派生

# 继承示例
class Father1:
        pass

class Father2:
        pass

class Son1(Father1):   # Son1继承Father1
    pass

class Son2(Father1,Father2):   # Son2同时继承Father1 & Father2
    pass

print(Son1.__bases__)
print(Son2.__bases__)

print(Father1.__bases__)
print(Father2.__bases__)

(<class '__main__.Father1'>,)                             #Son1继承Father1
(<class '__main__.Father1'>, <class '__main__.Father2'>)  #Son2继承Father1，Father2
(<class 'object'>,)      　　#Python3中有默认父类object
(<class 'object'>,)      　　#Python3中有默认父类object

# 在python3新建的类，默认都有一个父类（object） 

# 在python2中，默认是没有父类，可以添加（object）为父类

#Python2中的类：
#   
#   1.经典类
#        指的是没有继承默认父类object的类，以及没有继承object类的子类
#
#   2.新式类
#        值得是继承默认父类object以及object类子类的类
#
#
#Python3中的类：
#    
#    统一都是新式类

class SchoolPeople:
    
    school = 'SH high school'

    def __init__(self,name,age,gender):
        self.name = name
        self.age = age
        self.gender = gender
    
    def tell_info(self):
        print('School:Name is %s, Age is %s, Gender is %s' %(name,age,gender))

class SchoolStudent(SchoolPeople): #继承SchoolPeople

    def learn(self):
        print('%s is learning' %name)

    def tell_info(self):
        print('I'm student %s, Age is %s, Gender is %s ' %(name,age,gender))

class SchoolTeacher(schoolPeople):  #继承SchoolPeople

    def teach(self):
        print('%s is teaching' %name)
     
    def tell_info(self):
        print('I'm teacher %s, Age is %s, Gender is %s ' %(name,age,gender))

student1 = SchoolStudent('Bob','22','Male')
teacher1 = SchoolTeacher('Ajax','33','Female')

print(student1.__dict__)
print(student1.school)
print(teacher1.__dict__)

#子类已经自己定义tell_info()函数，显示格式将按照子类的格式显示，不需要按照父类的格式

student1.tell_info()
teacher1.tell_info()

class Foo:
    def F1(self):
        print('Foo.F1')

    def F2(self):
        print('Foo.F2')
        self.F1()

class Bar(Foo):   #继承Foo
    def F1(self):   #子类中同时也有与父类同名的方法F1
        print('Bar.F1')

obj = Bar()
obj.F2()      
# obj先到父类Foo中找到F2方法运行
# 运行到self.F1()的时候会调用子类Bar自己的F1()方法，而不在调用父类的F1()方法

Foo.F2
Bar.F1

class SchoolPeople:
    school = 'oldboy'

    def __init__(self, name, age, sex):
        self.name = name
        self.age = age
        self.sex = sex

    def tell_info(self):
        print("""
        ===========个人信息==========
        姓名：%s
        年龄：%s
        性别：%s
        """ %(self.name,self.age,self.sex))


class SchoolTeacher(SchoolPeople):    # 继承SchoolPeople
    
    def __init__(self, name, age, sex, level, salary):
        # self.name = name
        # self.age = age
        # self.sex = sex
        SchoolPeople.__init__(self,name, age, sex)   # 点名指向SchoolPeople

        self.level = level
        self.salary = salary

    def tell_info(self):
    SchoolPeople.tell_info(self)     # 点名指向SchoolPeople
        print("""
        等级：%s
        薪资：%s
        """ %(self.level,self.salary))

tea1 = SchoolTeacher('Bob', 18, 'male', 9, 50k)
# print(tea1.name, tea1.age, tea1.sex, tea1.level, tea1.salary)


tea1.tell_info()

class SchoolPeople:
    school = 'oldboy'

    def __init__(self, name, age, sex):
        self.name = name
        self.age = age
        self.sex = sex

    def tell_info(self):
        print("""
        ===========个人信息==========
        姓名：%s
        年龄：%s
        性别：%s
        """ %(self.name,self.age,self.sex))


class SchoolTeacher(SchoolPeople):    # 继承SchoolPeople
    
    def __init__(self, name, age, sex, level, salary):
        # self.name = name
        # self.age = age
        # self.sex = sex
        super().__init__(self,name, age, sex)   # 使用super()指向父类,Python3的格式
        #super(SchoolPeople,self).__init__(self,name, age, sex)     Python2的格式
        self.level = level
        self.salary = salary

    def tell_info(self):
        super().tell_info(self)      # 使用super()指向父类,Python3的格式
        #super(SchoolPeople,self).tell_info(self)    Python2的格式
        print("""
        等级：%s
        薪资：%s
        """ %(self.level,self.salary))

tea1 = SchoolTeacher('Bob', 18, 'male', 9, 50k)
# print(tea1.name, tea1.age, tea1.sex, tea1.level, tea1.salary)


tea1.tell_info()

class File(metaclass=abc.ABCMeta):
    @abc.abstractmethod 
    def read(self):   #必须要定义下面的方法，如果没有就不让实例化
        pass
    @abc.abstractmethod
    def write(self):
        pass
class Sata(File):
    def read(self):
        pass
    def write(self):
        pass
    def asb(self):
        print('adsf')
Fil=Sata()
Fil.asb()
print(Sata.mro())

class A(object):
    # def test(self):
    #     print('from A')
    pass
 
class B(A):
    # def test(self):
    #     print('from B')
    pass
 
class C(A):
    # def test(self):
    #     print('from C')
    pass
class D(B):
    # def test(self):
    #     print('from D')
    pass
 
class E(C):
    # def test(self):
    #     print('from E')
    pass
class F(D,E):
    # def test(self):
    #     print('from F')
    pass
 
f1=F()
print(F.mro())