Private Attributes and Name Mangling

Medium Encapsulation & Data Hiding

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Problem Statement

Create an `Account` class that sets a strictly private attribute `__balance` in its constructor. In the main block, try to access `__balance` directly. Catch the `AttributeError` and print ‘Cannot access’.

Input Format

A single integer for balance.

Output Format

Print 'Cannot access' due to name mangling.

Constraints

None

Sample Input

Sample Output

Cannot access

Explanation

Python renames variables prefixed with a double underscore to `_ClassName__var` to hide them, raising an error on direct access.

Starter Code

class Account:
    # Set private __balance here
    pass

if __name__ == '__main__':
    b = int(input())
    acc = Account(b)
    try:
        # Attempt direct access and print it
        pass
    except AttributeError:
        print('Cannot access')

Limits

Time Limit: 1s
Memory Limit: 256MB

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