Writing/implementing an API: testability vs information hiding

Question

Many times I am involved in the design/implementation of APIs I am facing this dilemma.

I am a very strong supporter of information hiding and try to use various techniq

Answer 1

what I don't like is making any sacrifices when it comes to information hiding

First, work with Python for a few years.

private is not particularly helpful. It makes extension of the class hard and it makes testing hard.

Consider rethinking your position on "hiding".