Solution:Step 1: Access private attribute via mangled namePrinting s._Secret__data outputs 123, the original private value.Step 2: Assign new attribute __data externallySetting s.__data = 456 creates a new public attribute, not changing the private one.Step 3: Calling reveal() returns original priva

[Solved] Consider this code:class Secret: def __init__(self): self.__data = 123 def reveal(self): return self.__data s = Secret() print(s._Secret__data) s.__data = 456 print(s.reveal())What is the output? | Python

Python - Encapsulation and Data Protection

Consider this code:

class Secret:
    def __init__(self):
        self.__data = 123
    def reveal(self):
        return self.__data

s = Secret()
print(s._Secret__data)
s.__data = 456
print(s.reveal())

What is the output?

A123\n456

B123\n123

C456\n456

DAttributeError

Step-by-Step Solution

Solution:

Step 1: Access private attribute via mangled name
Printing s._Secret__data outputs 123, the original private value.
Step 2: Assign new attribute __data externally
Setting s.__data = 456 creates a new public attribute, not changing the private one.
Step 3: Calling reveal() returns original private attribute
The method reveal() returns the private __data, still 123.
Final Answer:
123 123 -> Option B
Quick Check:
External __data creates new attribute, private remains unchanged [OK]

Quick Trick: External __attr creates new attribute, private stays intact [OK]

Common Mistakes:

Assuming external __data overwrites private attribute
Expecting reveal() to return new value
Confusing mangled and normal attributes

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More Python Quizzes

Consider this code:

Step 1: Access private attribute via mangled name

Step 2: Assign new attribute __data externally

Step 3: Calling reveal() returns original private attribute

Final Answer:

Quick Check:

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