Equivalent of NotImplementedError for fields in Python

Yes, you can. Use the @property decorator. For instance, if you have a field called “example” then can’t you do something like this:

class Base(object):

    @property
    def example(self):
        raise NotImplementedError("Subclasses should implement this!")

Running the following produces a NotImplementedError just like you want.

b = Base()
print b.example