[Solved] Identify the error in this code:class Person: name = "Unknown" @classmethod def set_name(cls, name): self.name = name Person.set_name("Alice") print(Person.name) | Python

Python - Class Methods and Static Methods

Identify the error in this code:

class Person:
    name = "Unknown"

    @classmethod
    def set_name(cls, name):
        self.name = name

Person.set_name("Alice")
print(Person.name)

AUsing self instead of cls inside class method

BMissing @staticmethod decorator

CCalling class method on instance instead of class

DNo error, code runs fine

Step-by-Step Solution

Solution:

Step 1: Check parameter usage in class method
The method uses self.name, but class methods should use cls to access class variables.
Step 2: Understand effect of error
Using self causes a NameError because self is not defined in class method scope.
Final Answer:
Using self instead of cls inside class method -> Option A
Quick Check:
Class methods use cls, not self [OK]

Quick Trick: Use cls, not self, inside class methods [OK]

Common Mistakes:

MISTAKES

Confusing self and cls
Forgetting to use cls to access class variables
Assuming class methods behave like instance methods

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Identify the error in this code:

Step 1: Check parameter usage in class method

Step 2: Understand effect of error

Final Answer:

Quick Check:

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