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 python, or is the pattern wrong if so what
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 the CURRENT class to super, not the parent. So: Python will figure
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 Animal and specify the generic
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 inconsistent and I would love to have a better
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 conventions like a leading underscore for private instance variables. My question is, is there a particular convention
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