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Python Programming - Encapsulation - Discussion

Discussion Forum : Encapsulation - General Questions (Q.No. 90)
Encapsulation
90.
In Python, what is the benefit of using a private variable with a double underscore prefix, such as __weight? 
class Product:
    __weight = 0

    def update_weight(self, weight):
        Product.__weight += weight
It improves code maintainability by hiding implementation details
It allows unrestricted access to __weight
It exposes all internal details of __weight
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 __weight.
Discussion:
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