Abstract attribute (not property)?

Question

What\'s the best practice to define an abstract instance attribute, but not as a property?

I would like to write something like:

class AbstractFoo(me         


        

Answer 1

Following https://docs.python.org/2/library/abc.html you could do something like this in Python 2.7:

from abc import ABCMeta, abstractproperty


class Test(object):
    __metaclass__ = ABCMeta

    @abstractproperty
    def test(self): yield None

    def get_test(self):
        return self.test


class TestChild(Test):

    test = None

    def __init__(self, var):
        self.test = var


a = TestChild('test')
print(a.get_test())