How to access an instance variable in another class in python

I am writing a program that is utilizing multiple classes. I have one class that is dedicated to determining values for a set of variables and a py file have an instance of class login. I would then like to be able to access the values of those variables with other classes. My code looks as follows:

main.py:

import logindef main():    root = tk.Tk()    login.Login(root)

login.py:

import adminclass Login:    def __init__(self , root):        self.root = root        self.var1= tk.StringVar()    def loginFunc(self):        self.var3= tk.Entry(self, textvariable=self.var1) #var1 get value through tkinter form        admin.AdminControls(self.root)

admin.py:

import loginclass AdminControls:    def __init__(self, root):        self.root = root        self.adminControlsFrame()    def adminControlsFrame(self):        self.labelName= Label(self.entriesFrame, text="welcome"+var1) #this is where I want to use var1

I have 7 variables in login class just as same as var1 and I need to use them all in admin.

should I just pass them all as function arguments (like admin.AdminControls(self.root, var1, var2, var3, ..)) or is there a cleaner way?

I have read Use or access class instances directly in another class in Python, but the problem is my classes are in different files.