[Solved] What is the cause of the error in this code?class DataHolder: def __init__(self): self.__info = 123 obj = DataHolder() print(obj.__info) | Python

Python - Encapsulation and Data Protection

What is the cause of the error in this code?

class DataHolder:
    def __init__(self):
        self.__info = 123

obj = DataHolder()
print(obj.__info)

ATypeError because __info is private

BSyntaxError due to double underscores in attribute name

CAttributeError because __info is name-mangled and not accessible as __info

DNo error; prints 123

Step-by-Step Solution

Solution:

Step 1: Understand name mangling effect
Attribute __info is internally renamed to _DataHolder__info.
Step 2: Accessing attribute
Trying to access obj.__info raises AttributeError because __info does not exist as such.
Final Answer:
AttributeError because __info is name-mangled and not accessible as __info -> Option C
Quick Check:
Direct access to double underscore attribute fails [OK]

Quick Trick: Double underscore attributes are mangled, direct access fails [OK]

Common Mistakes:

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What is the cause of the error in this code?