Tag: class

do i need to use exactly same attribute names to properties in custom preprocessing class which inherit scikit learn BaseEstimator?

when writing custom classes inherit from BaseEstimator of the sklearn throwing AttributeError: object has no attribute . but that attribute is present and has values. print(null) execute or null. then it throws the above attribute error. traceback shows that this error happens in getattr() in sklearn base. I found that this is caused by attributes that assign to different property

Python: Why do functools.partial functions not become bound methods when set as class attributes?

class functools python python-3.x

I was reading about how functions become bound methods when being set as class atrributes. I then observed that this is not the case for functions that are wrapped by functools.partial. What is the explanation for this? Simple example: I kind of expected them both to behave in the same way. Answer The trick that allows functions to become bound

Why Does Python Method Needs a `self` pointer for Recursion to Work?

class object python python-3.x recursion

I’m new to Python and want to use it for LeetCode. I was doing a recursion problem and realized that I have to use self. pointer in order for the recursion to work. Here is my initial code: However, this would give me an error: I had to add a self. before reverseList() in order for it to work. I’m

Python Trigger a function when a function is called

class python

So, I am making a desktop app with PyQt6. I have a stylesheet and I want it to update every time I add something to it. Stylesheet is an array and I have multiple functions adding things to it: Now, I want to update the stylesheet every time I call one of these functions (or a function in the class

Not able to import a class from a another package in python

class class-hierarchy package python

I’m trying to import a class from somename.py into nicename.py. At first I created the the __init__.py file and left it empty. Then I wrote (in nicename.py): and I also tried the command without double points at first. It returns: ModuleNotFoundError: No module named ‘getdir’ Answer Maybe not the most elegant but you can add the path in sys.path before

Two different Python classes sharing attribute with same underlying object

attributes class oop python

Is it possible in Python to have two objects, each of them an instance of a different class, that always share the same value for a particular attribute? For instance, suppose the following code: Here my goal would be for a.grid and b.grid to contain the same value always, regardless of whether one is initialized from the other or which

Issue with class declaration in python. Two classes with fields of each other

class python

My code is something like this: and i have NameError: name ‘className2’ is not defined. I don’t know if there is a declaration in python like in c++, and you can call classes in any order. Please help me… full code: field Speciality.abit is calls AdmissionList and field AdmissionList.speciality calls Speciality. Answer I think i avoid that problem by adding

Share attributes/ variables between classes python

class python

Answer Your issue here is that you’re trying to access local variables instead of instance attributes. Here’s how you should do it: From the console output:

I am having trouble with enemies in pygame

class pygame python python-3.x

I have been trying to create an enemy class for my snake game that I can execute in my pygame loop, but my fill_screen() function keeps it so that either one enemy is on the screen at a time, or no enemies are on the screen. I hope someone can help me with this issue, because I have been working