Simple example of my problem: The issue is that all services in this instance will share subscribers, hence my solution was to create a function that returns the abstract service as such: This now works because subscribers are unique to each class inheriting the abstract service. Issues Is this correct for py…
Tag: abstract-class
How to let the constructor in the subclass inherit the constructor or base class?
I have the following code segment, which is shown as follows along with its output I would like to let the subclass, e.g. Employee, can also inherit the functionality implemented in the constructor of AbstractClass. In specific, the print(‘the salary information’) I added: Answer You need to pass …
Abstract base class using type of subclass in abstractmethods
I want to create an abstract base class with an abstract method that returns an instance of any subclass that implements the interface. Is there a more pythonic way to achieve this for mypy other than what I have created below? In my code example, I make the Animal class generic. Subclasses can inherit from A…
What’s the difference between an inner class and an inner inner class in python? [duplicate]
This question already has answers here: Short description of the scoping rules? (9 answers) Closed 7 months ago. Shouldn’t field be undefined on line 50? It was my understanding that inner nested classes did not have visibility to outer classes, as I ran into on line 65… Just seems kind of inconsi…
Python abstract classes – how to discourage instantiation?
I come from a C# background where the language has some built in “protect the developer” features. I understand that Python takes the “we’re all adults here” approach and puts responsibility on the developer to code thoughtfully and carefully. That said, Python suggests conventio…
Equivalent of NotImplementedError for fields in Python
In Python 2.x when you want to mark a method as abstract, you can define it like so: Then if you forget to override it, you get a nice reminder exception. Is there an equivalent way to mark a field as abstract? Or is stating it in the class docstring all you can do? At first I thought I could