在相同的类中调用相同的函数但以不同的方式调用 - python

I have a code which open a main frame window with 2 buttons and a counter. If press Open Msg it show up a message and if i choose yes i open a new frame. If i press Open Page ZS it opens new frame also. My issue is that when i try to open that new frame from inside the function that do counting i get "NameError: global name 'controller' is not defined". Thank you in advanceI have a code which open a main frame window wi