I’m reading Mark Summerfield’s Programming in Python 3 book. In the chapter on OOP, he uses the below Circle class to demonstrate inheritance. Regarding the __eq__ method, he states: "This method compares this circle’s radius with the other circle’s radius and if they are equal it then explicitly call’s the base class’s __eq__ method using ..
I was working on a game using the pygame library on Python. I basically defined a Character class from which the Knight class and Enemy class would inherit functions. Since both children classes use the same initialize functions, I defined the init function under the parent class. However, I don’t fully understand how it works ..
Summary: I want to create a class that receives an object in init and becomes that object plus some extra functions that the class has. For example, the Flexible class: class Flexible(): def __init__(self, obj): self.obj = obj def be_flexible(self): print("Do something") car = Flexible(Car(‘BMW’)) plane = Flexible(Plane(‘Boeing 747’)) car.drive() car.park() car.be_flexible() plane.fly() plane.be_flexible() Details: ..
I would like to build a recursive-type class, where the class is a list of things including itself. How can this be achieved? It doesn’t seem to work even with from __future__ import annotations. from __future__ import annotations from typing import Union, List class A: pass class AList(List[Union[A, AList]]): pass Source: Python..
I have a super class FTM: class FTM: def __init__(self,word_weighting = ‘normal’): self.word_weighting = word_weighting def get_sparse_global_term_weights(self, word_weighting): pass And a subclass that inherits from FTM: class FLSA(FTM): def __init__(self, word_weighting=’normal’): super().__init__(word_weighting = word_weighting) self.sparse_global_term_weighting = super().get_sparse_global_term_weights(word_weighting = super().word_weighting) Running this code, I get the following error: AttributeError: ‘super’ object has no attribute ‘word_weighting’ I ..
I’m rather new to class inheritance and need some assistance I have a problem, where I want to override a parent class method, after it has been called from another inherited parent class method. The basic concept looks something like this: class Parent: """Parent class, that defines the logical workflow""" def __init__(self): pass def outer_method(self): ..
The below code is from a book I’m reading related to OOP in Python 3. Can someone help me understand the logic of the below? It seems counterintuitive that the Folder class inherits from the File class. For example, in the below, when a Folder is instantiated, it seems that a File is also instantiated ..
I have a superclass with inheritance to three subclasses. The superclass contains a method whose output variable depends on the subclass that calls the method. Below, you see an example in which I feed the method a parameter to indicate what output to generate. def dimensionality_reduction(self, algorithm, sparse_weighted_matrix, factors): ut, _, v = sparsesvd(sparse_weighted_matrix, factors) ..
I am working with Django 3.2 and I would like to create an abstract class with 2 fields whose default values (or their blank attribute) could change in each of the child classes. I’d like not to override the full fields but only the options that change. That way, if I decide to make the ..
I am trying to run some basic testcase for a basic project but i get this error inspite of initializing super class constructor below is my code. home.py ` class home(Pages): user = (By.NAME, "user-name") utxt = "standard_user" pwd = (By.ID, "password") ptxt = "secret_sauce" logbtn = (By.NAME, "login-button") def __init__(self,driver): self.driver=driver super().__init__(self.driver) def logg(self): ..