python封装，继承，复写详解

目录

1.封装 

2.继承 

复写和使用父类成员

---

1.封装 

 

 

class phone:
 
    __voltage = 0.5
 
    def __keepsinglecore(self):
        print("单核运行")
 
    def callby5g(self):
        if self.__voltage >= 1:
            print("5g通话开启")
        else:
            self.__keepsinglecore()
            print("不能开启5g通话")
 
p = phone()
p.callby5g()

 

2.继承 

 

class phone:
    imei = None
    producer = "aa"
 
    def call_by_4g(self):
        print("4g通话")
 
class phone2024(phone):
    face_id = 1
 
    def call_by_5g(self):
        print("5g通话")
 
p = phone2024()
print(p.producer)
p.call_by_4g()

 

 如果是多继承并且有同名的，会以之前的为优先，之后的会被覆盖

class phone:
    imei = None
    producer = "aa"
 
    def call_by_4g(self):
        print("4g通话")
 
class nfc:
    def read(self):
        print("nfc读卡")
 
class phone2024(phone,nfc):
   pass
 
#用pass表示这里是空的
 
p = phone2024()
print(p.producer)
p.call_by_4g()
p.read()

 

复写和使用父类成员

class phone:
    imei = None
    producer = "aa"
 
    def call_by_4g(self):
        print("4g通话")
 
class nfc:
    def read(self):
        print("nfc读卡")
 
class phone2024(phone,nfc):
   producer = "bb"
 
   def read(self):
       print("nfc读卡功能启动")
 
#用pass表示这里是空的
 
p = phone2024()
print(p.producer)
p.read()

 

class phone:
    imei = None
    producer = "aa"
 
    def call_by_4g(self):
        print("4g通话")
 
class nfc:
    def read(self):
        print("nfc读卡")
 
class phone2024(phone,nfc):
   producer = "bb"
 
   def read(self):
       print("nfc读卡功能启动")
       #方式1
       phone.call_by_4g(self)
       print(phone.producer)
       #方式2
       super().call_by_4g()
       print(super().producer)
 
 
#用pass表示这里是空的
 
p = phone2024()
print(p.producer)
p.read()