class-method

How can a child class inherit a class method from its parent that gets a class variable from the child in python?

How can a child class inherit a class method from its parent that gets a class variable from the child in python? Question: I have a code here where I define a parent class with class methods and class variables: class Parent: var1 = ‘foo’ var2 = ‘bar’ def getVar1Var2AsString(self): return f'{Parent.getVar1()}_{Parent.getVar2()}’ @classmethod def getVar1(cls): …

Total answers: 3

Why the instance value of variable is not changing in python

Why is the instance variable not getting changed? Question: class Player: def __init__(self, Name, Age, Sex): self.Name = Name self.Age = Age self.Sex = Sex self.validate(Name,Age,Sex) @classmethod def validate(cls, Name, Age, Sex): if (not isinstance(Age,int)) or Age < 0: Age = int(input(‘Please input a valid integer greter than 0’)) return cls(Name,Age,Sex) def showDetails(self): return f’Player …

Total answers: 2

Python – Problem returning True/False to class properties from class method

Python – Problem returning True/False to class properties from class method Question: I have a class as below which within the __init__ method I am trying to assign a True/False value to a class property using a class method. class Sensor: def __init__(self, json_data): self.sensor_eui = json_data[‘end_device_ids’][‘dev_eui’] self.reading1 = json_data[‘uplink_message’][‘decoded_payload’][‘temperature’] self.reading2 = json_data[‘uplink_message’][‘decoded_payload’][‘humidity’] self.tolerance_exceeded = …

Total answers: 1

Instantiate from csv with pandas

Instantiate from csv with pandas Question: I have previously made a code to instantiate from a csv file. I what to do the same with Pandas (gives more possibilities when importing csv file). Is this possible? What I want (without Pandas): @classmethod def instantiate_from_csv(cls): with open(‘items.csv’, ‘r’) as f: reader = csv.DictReader(f) items = list(reader) …

Total answers: 1

Python question about overridden/redifined imported function as Class method

Python question about overridden/redifined imported function as Class method Question: In https://github.com/biopython/biopython/blob/518c4be6ae16f1e00bfd55781171da91282b340a/Bio/SeqUtils/ProtParam.py I have this importing statement: from Bio.SeqUtils import molecular_weight and then in a Class: class ProteinAnalysis: ….. ….. def molecular_weight(self): """Calculate MW from Protein sequence.""" return molecular_weight( self.sequence, seq_type="protein", monoisotopic=self.monoisotopic ) …… …… What is this type of coding called? Is it normal …

Total answers: 3

'classmethod' object is not callable

'classmethod' object is not callable Question: I was performing this exercise. The gentleman on Youtube did not have any issue, but I got the following error. Could anyone give me a piece of advice on how to work with classmethods in order to avoid this? Thanks in advance. class Employee: def __init__(self,first,last,pay,email): self.first=first self.last=last self.pay=pay …

Total answers: 1

Using a classmethod to wrap class functions, but not as an alternate constructor

Using a classmethod to wrap class functions, but not as an alternate constructor Question: I’ve gotten in the habit of using classmethods to wrap class functions rather than as an alternate constructor. It seems great to keep all relevant functions within the class namespace rather than defining a wrapper function in the general namespace. I’ve …

Total answers: 2

what is the use and when to use @classmethod in python?

what is the use and when to use @classmethod in python? Question: I have never used @classmethod and I do not think of any examples to use it, I know how it works but I do not know when it’s time to use it for example class Example: def __init__(self,param1,param2): self.param1 = param1 self.param2 = …

Total answers: 1