[Solved] Identify the mistake in this Python class:class Sample: def __init__(self, data): data = data def display(self): print(self.data) obj = Sample(5) obj.display() | Python

Python - Constructors and Object Initialization

Identify the mistake in this Python class:

class Sample:
    def __init__(self, data):
        data = data
    def display(self):
        print(self.data)

obj = Sample(5)
obj.display()

AThe instance variable is not assigned to self

BThe display method is missing self parameter

CThe class name should be lowercase

DThe print statement syntax is incorrect

Step-by-Step Solution

Solution:

Step 1: Check __init__ method
The line data = data assigns the parameter to itself, not to an instance variable.
Step 2: Correct assignment
It should be self.data = data to store the value in the instance.
Step 3: Verify display method
display correctly has self and prints self.data.
Final Answer:
The instance variable is not assigned to self -> Option A
Quick Check:
Instance variables must be assigned with self. [OK]

Quick Trick: Always assign instance variables with self. [OK]

Common Mistakes:

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