Class method for beginners in python [closed]

can someone PLEASE explain how to use class methods between the class call. We are currently making a tic tac toe game that requires a 3X3 grid, and we want to make a list of list with designated numbers, which will be replaced with either an X or an O in later versions.

Again, for now, I just want to make a 3X3 grid, including the class method call somehow with this format: @… def example