Tag: class

How to change the values of instance attributes in a loop

I have a work implantation of python which has some inbuilt dialog boxes so I cannot share the original code here. The problem I have is I want to update the values of some instance attributes. I made a dictionary from zipping 2 lists together so that in a for loop I could mention to the user the string that

How can show the singleton object’s attribution?

class python python-3.x

We can show instance’s attribution with dir function. Now create a class with metaclass method: Show Cls’s _instances attrubution: Why no string _instances in dir(Cls)? Answer Because it’s stored on the metaclass. To be clear, this has nothing to do with the singleton aspect.

Python/Pygame : “pygame.error: display Surface quit”

class pygame python

So, I’m making a game project, and I decided, for once, to make a custom class for my pygame window, like so : And, in the gameloop, I decided to make an instance of this class, and to call the method, like so : But when I try to run the main loop, it gives me this error message (that

Invoking a constructor in a ‘with’ statement

class python python-3.x with-statement

I have the following code: Running it produces the following output: But I expected it to produce: Why isn’t the code within my first example called? Answer The __enter__ method should return the context object. with … as … uses the return value of __enter__ to determine what object to give you. Since your __enter__ returns nothing, it implicitly returns

Inherit choice class to extend it?

class django django-models python tuples

I have a field in my models.py that accepts choices determined in a class: The choice class is this: My doubt is how can I inherit this UserChoices class to another choice class, in order to extend it with another options. I tried the following: But it gives me a migration error: Obviously this example is simplified, the actual code

Pylint throws not-callable on decorator defined within class

callable class decorator pylint python

Im trying to create a class that has a time remaining property and executing functions within it reduces this time. Here is the code Then when i instantiaite the class and use do_something like so: It works as expected. However when i run pylint on the code i get an error: Is this a false positive or is there a

How to override module name (name)?

class global-variables oop python python-module

I have two classes in separate files, a.py and b.py. I can not modify a.py in any way. The log output is: I want to change __name__ so that a child class’s call should log called in b. My project logs its module name as part of the output. However, when I inherit a class and call the parent class

How to implement abstract classes over mulitple inheritances? [closed]

abc class python python-3.x

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 1 year ago. Improve this question I have a question on multi level inheritance. I am trying to write classes of the form: I am not planning

how to pass variables to method

class oop python

I want to pass variables to the method. which of the following is better? (x and y are constants) or: Answer I’d argue the second one is better with regards to function purity, though this is a principle of Functional Programming rather than Object Oriented Programming. The only thing I’d wonder then is why you’d even make it a member

What is the difference between having a main bot class versus no class on discord py?

bots class discord python

With discord python bots, I can’t seem to find a great answer on this and the documentation actually uses both examples randomly. What is the main difference between using a bot class in your bot.py versus starting your bot without a class? See below for an example Example bot with a class: Example of a regular bot without the class: