即使我返回2个变量，对象也不可迭代？

I call a class called Login_window with two variables "equaling" it ( wasnt sure how to word that but you'll see in the code) and when this line runs an error occurs: "TypeError: 'Login_window' object is not iterable". Although this error appears the entry window still appears how its meant and i can print of the entry if i dont have Login_window "equal" two variables.I call a class called Login_window with two var