Double underscore in this context means hit the underscore key twice before typing the name of something like a method., yes?

Question

double underscore has special meaning

Answer 1

Double underscore represent both magic methods and private attributes. Double underscores are meant to be put one at the beginning and one at the end of the method's name for magic methods whereas for making an atrribute private they both have to be typed at the beginning !.

Answer 2

double underscore has special meaning

Answer 3

yes