access-modifiers

I am coding a small Python module composed of two parts: some functions defining a public interface, an implementation class used by the above functions, but which is not meaningful outside the module. At first, I decided to "hide" this implementation class by defining it inside the function using it, but this hampers readability and cannot be used if multiple functions reuse the same class. So, in addition to comments and docstrings, is there a mechanism to mark a class as "private" or "internal"? I am aware of the underscore mechanism, but as I understand it it only applies to variables,

In C#, we can not change access modifier while overriding a method from base class. e.g. Class Base { **protected** string foo() { return "Base"; } } Class Derived : Base { **public** override string foo() { return "Derived"; } } This is not valid in C#, It will give compile time error. I want to know the reason, why it's not allowed. Is there any technical problem or can it lead to something which is not consistent in terms of access restriction??? InBetween Changing the access modifier of a method in a derived type is pointless that's why it's not allowed: Case 1: Override with a more

class Test{ public static void main(String arg[]){ System.out.println("**MAIN METHOD"); System.out.println(Mno.VAL);//SOP(9090); System.out.println(Mno.VAL+100);//SOP(9190); } } class Mno{ final static int VAL=9090; static{ System.out.println("**STATIC BLOCK OF Mno\t:"+VAL); } } I know that a static block executed when class loaded. But in this case the instance variable inside class Mno is final , because of that the static block is not executing. Why is that so? And if I would remove the final , would it work fine? Which memory will be allocated first, the static final variable or the static