Error "__init__ method from base class is not called" for an abstract class

Question

I have

class A(object):
    def __init__ (self): raise NotImplementedError("A")

class B(A):
    def __init__ (self):
        ....

and pylint says

__init__ method from base class 'A' is not called

Obviously, I do not want to do

super(B, self).__init__()

• so what do I do?

(I tried abc and got

Undefined variable 'abstractmethod'

from pylint, so that is not an option either).

Answer 1

Using abc works for me:

import abc

class A(object):
    __metaclass__ = abc.ABCMeta

    @abc.abstractmethod
    def __init__(self):
        pass

class B(A):
    def __init__(self):
        super(B, self).__init__()

I get warnings, but nothing related to abc or the parent's __init__ not being called:

C:  1, 0: Missing module docstring (missing-docstring)
C:  3, 0: Invalid class name "A" (invalid-name)
C:  3, 0: Missing class docstring (missing-docstring)
R:  3, 0: Too few public methods (0/2) (too-few-public-methods)
C:  9, 0: Invalid class name "B" (invalid-name)
C:  9, 0: Missing class docstring (missing-docstring)
R:  9, 0: Too few public methods (0/2) (too-few-public-methods)
R:  3, 0: Abstract class is only referenced 1 times (abstract-class-little-used)

For what its worth, I'm with @holdenweb on this one. Sometimes you know better than pylint.