How to pass variables from one class to another

[hobbyist]

Everything works from post #16. I also need to use this code:

class GetInterestingInfo(): # assume this class: class MyToolBar(mpl_qt.NavigationToolbar2QT):
    def get_info(self):
        self.device.read_data()
        self.process_raw_data()
        return self.processed_data
 
class UseInterestingInfo():
    def use_info(self, interesting_info):
        pass
 
 
x = GetInterestingInfo()
y = UseInterestingInfo()
 
y.use_info(x.get_info()):

but instead of class GetInterestingInfo I have put class MyToolBar(mpl_qt.NavigationToolbar2QT). Please look post #11. How do I call it in this command:

x = MyToolBar() 

I cannot call it like this, because it needs arguments inside the parentheses. I cannot also put self.plotCanvas, self. So what do I put inside?

(The idea is to send values from class MyToolBar to the class UseInterestingInfo)