标签：meta 强制 rom 不用 导入 文件的 ror str 导入模块
接口继承就是（基类）父类定义好2个函数属性（接口），所有的子类必须有这2个函数属性，缺一不可，不是说省代码的，是用来做强制性约束的
基类里面的方法不用具体的实现，只是一个规范而已
class Disk:
def read(self):
pass
def write(self):
pass
class Cdrom:
def read(self):
pass
def write(self):
pass
class Mem:
def read(self):
pass
def write(self):
pass
class Allfile:
def read(self):
pass
def write(self):
pass
class Disk(Allfile):
def read(self):
print("disk read")
def write(self):
print("disk write")
class Cdrom(Allfile):
def read(self):
print("cdrom read")
def write(self):
print("cdrom write")
class Mem(Allfile):
def read(self):
print("mem read")
def write(self):
print("mem write")
class Allfile:
def read(self):
pass
def write(self):
pass
class Disk(Allfile):
def read(self):
print("disk read")
def write(self):
print("disk write")
class Cdrom(Allfile):
def read(self):
print("cdrom read")
def write(self):
print("cdrom write")
class Mem(Allfile):
def read(self):
print("mem read")
m1=Mem()
m1.read()
m1.write()
C:\python35\python3.exe D:/pyproject/day25/接口继承.py
mem read
导入模块abc，给父类2个属性加上装饰器之后，如果子类再少属性的话，就直接报错了，这样就强制性的约束了子类必须有父类的2个方法了
import abc
class Allfile(metaclass=abc.ABCMeta):
@abc.abstractstaticmethod
def read(self):
pass
@abc.abstractstaticmethod
def write(self):
pass
class Disk(Allfile):
def read(self):
print("disk read")
def write(self):
print("disk write")
class Cdrom(Allfile):
def read(self):
print("cdrom read")
def write(self):
print("cdrom write")
class Mem(Allfile):
def read(self):
print("mem read")
m1=Mem()
TypeError: Can‘t instantiate abstract class Mem with abstract methods write
import abc
class Allfile(metaclass=abc.ABCMeta):
@abc.abstractstaticmethod
def read(self):
pass
@abc.abstractstaticmethod
def write(self):
pass
class Disk(Allfile):
def read(self):
print("disk read")
def write(self):
print("disk write")
class Cdrom(Allfile):
def read(self):
print("cdrom read")
def write(self):
print("cdrom write")
class Mem(Allfile):
def read(self):
print("mem read")
def write(self):
print("mem write")
m1=Mem()
m1.read()
m1.write()
mem read
mem write
标签：meta 强制 rom 不用 导入 文件的 ror str 导入模块
原文地址：https://www.cnblogs.com/NumerOne/p/11465127.html
