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Python Programming - Encapsulation - Discussion

Discussion Forum : Encapsulation - General Questions (Q.No. 78)
Encapsulation
78.
In Python, what is the benefit of using a private variable with a double underscore prefix, such as __total? 
class ShoppingCart:
    __total = 0

    def add_item(self, price):
        ShoppingCart.__total += price
It improves code maintainability by hiding implementation details
It allows unrestricted access to __total
It exposes all internal details of __total
It creates a global variable
Answer: Option
Explanation:
Encapsulation with a double underscore prefix improves code maintainability by hiding the implementation details of the class attribute __total.
Discussion:
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