Passing a variable to reference instance attributes-CodePudding

Can someone explain what is happening in the function after the initialiser?

Specifically other.row and other.column. I have never seen this before and don't understand how you can pass a variable and use it to reference instance attributes.

class Window:
    def __init__(self, row: int, column: int):
        self.column = column
        self.row = row

    def __add__(self, other):
        row = self.row   other.row
        col = self.column   other.column
        return Tile(row, col)

CodePudding user response：

self is an object from which you are calling the method, other is the second object. Typing obj1 obj2 will cause that python is looking for __add__ dunder method in the obj1 class. If he finds it, he takes as first argument obj1(self), the second argument is obj2(other). Then he takes the row value from obj1(called self) and row value from obj2(called other). Objects must have column and row variable, if one of them don't have it, an exception will be raised. The same goes for column