Will the following not cause issue of freeing memory twice? Why is python3 destroying an object when it has already been destroyed by the programmer? Output: Answer By calling __del__() you’re just calling a method on the instance, without any special meaning. The __del__() method, both yours and by def…
Tag: object
Python – Access a list from a class using instance[]
So I have this code : And when I create an instance, like this : To access a value (like 3 for example), I know I should do and I would like to know how to access it using and still use Thanks in advance ! Answer Define the __getitem__ function to allow for custom indexing:
How can I make Objects communicate with each other in Python?
I am making a little project for Neurons on replit. I made a class called Neurons. I set connections = []. I created a function called connect() to connect two Neurons via synapses. If one neuron fires, all of the other Neurons in the connections list would receive the signal. How could I make two different O…
Updating the json file edited in Python
Suppose I have a json file like – This is a single object. There are hundreds of objects similar to these. What i did was I accessed every ‘name’ from “name_list” and cleaned it using some rules. In that process some common name were removed. Now I want to update the cleaned data…
Accept only objects in a method and return new object
I want to create a method that only takes objects of the class it is is defined in, manipulates it and returns a new object of the same class. For example: Does anyone have an idea how to get this done? best regards, David Answer You can do something like this : You can add type checking directly in the
How is the initialization of objects considered in this code?
In this class there is no attribute called “a” then how x.a is considered ? Similarly what is “x.a.b”, “x.a.b.c”, “x.a.b.c.d”, “x.a.b.c.d.e” and how are they considered ?Is b is an attribute of x.a in the case of “x.a.b” and c is a attrib…
Is it a mandatory to have two classes(Node,Tree) while implementing a binary tree?
This may sound silly but trust me , I have searched for various articles online and could not find a proper explanation or no explanation at all , Does it really need two classes one for Node and one for tree to implement binary tree? for Instance , let’s take a simple python code : this is bascially wh…
How do you best mark node as visited in Depth First Search?
In some algorithms, like DFS, we need to mark nodes as visited. If I have a Node class, in Python we can write something like node.visited = True. However when I do that, I change the nodes which might be undesired. So what would be the best and cleanest approach here? Things I thought of: delete the attribut…
attributeError when calling method of object class
Trying to animate a car with button to accelerate and decelerate. When I press a button to accelerate/decelerate, I get an error in the ‘if’ statements on both methods “AttributeError: ‘bool’ object has no attribute ‘speed’”. Can someone help me figure out what’…
Why is my class object not working as intended?
I have two issues that need resolving. I have created a class object LoanInstance. The object should create a list of numbers (int or float) that show different aspects of a personal loan repayment balance. There are 2 main parts to the object. Part 1: Read in data from a data frame (I’ve created an exa…