Python - 클래스 추상함수 구현 요구

 

추상함수를 정의하고 구현하지 않을 경우 생성할 수 없게 제약을 걸 수 있다.

 

추상함수 c1f1()의 예제.

import abc

class C1(metaclass=abc.ABCMeta):
	@abc.abstractmethod
	def c1f1(self):
		print("C1f1")
		pass
	pass

class C2(C1):
	def c2f1(self):
		preint("C2f2")
		pass
	pass

class C3(C1):
	def c1f1(self):
		print("C3c1f1")
		pass
	pass



c1 = C1()
c2 = C2()
c3 = C3()
c3.c1f1()

 

>>> c1 = C1()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Can't instantiate abstract class C1 with abstract methods c1f1

>>> c2 = C2()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Can't instantiate abstract class C2 with abstract methods c1f1
>>> c3.c1f1()
C3c1f1

 

다른 예제 realpython.com/python-interface/