Can I dynamically convert an instance of one class to another?

Question

I have a class that describe chess pieces. I make for all type piece in the Board a class for example Pawn, Queen, keen, etc... I have a trouble in Pawn class I want to conv

Answer 1

An object in Python will always be an instance of its class. There is no way to change that without resorting to "dirty hacks".

In your case, you should probably consider refactoring the logic. Instead of letting a piece move itself, define some kind of controller that moves the pieces. If a pawn reaches the last row, this controller can easily replace a piece with another.