Is there any way to share a variable between a library and a main script in python?

I have a main script script.py

from tkinter import *

root = Tk()

frame = Frame(root)
frame.pack()
textDisplay = Entry(frame)
textDisplay.pack()
btn1=Button(root,text='add here ',command=function)
btn1.pack()
def function ():
    textDisplay.insert(0,'Some String')
    return

root.mainloop()

i want to create a library that contain my functions (function()), so i create MyLib.py

from script.py import textDisplay
def function ():
    textDisplay.insert(0,'Some String')
    return

and i add this line to script.py

from MyLib.py import *

so script.py will be:

from tkinter import *
from MyLib.py import *
root = Tk()

frame = Frame(root)
frame.pack()
textDisplay = Entry(frame)
textDisplay.pack()
btn1=Button(root,text='add here ',command=function)
btn1.pack()

root.mainloop()

when i run it show me an error, whats the problem?!

Traceback (most recent call last):
File "c:\Users\Hp\OneDrive\Bureau\emojiDesktopKeyboard\script.py", line 
5, in <module>
from emojiLib import *
File "c:\Users\Hp\OneDrive\Bureau\emojiDesktopKeyboard\emojiLib.py", 
line 1, in <module>
from script import textDisplay
File "c:\Users\Hp\OneDrive\Bureau\emojiDesktopKeyboard\script.py", line 
32, in <module>
btn1=Button(root,text='\U0001F600 ',command=enter1F600 ,width=5,font= 
("Arial", 15), cursor="hand2" , bg="#a9dce3")
NameError: name 'enter1F600' is not defined

>Solution :

One solution that can be used is :

script.py

from tkinter import *
from mylib import myfunc

class Display:
    def __init__(self):
        self.root = Tk()
        self.frame = Frame(root)
        self.frame.pack()
        self.textDisplay = Entry(self.frame)
        self.textDisplay.pack()
        self.btn1=Button(root,text='add here ',command=lambda: myfunc(self.textDisplay))
        self.btn1.pack()

    def show(self):
        self.root.mainloop()

if __name__ == "__main__":
    display = Display()
    display.show()

mylib.py

def function(textDisplay):
    textDisplay.insert(0,'Some String')

Please notice the following points:

• renamed the library files to fit the usual python standard, and fixed import names
• removed cyclical import, now we have only one import of mylib in script.py
• function() has been modified to take an argument into account, that way you can send data from your main script to your module without importing. Then the function is called using a lambda so that it keeps the same signature.
• created a class Display to try and make it more readable, but it’s not striclty necessary I guess
• lastly, another way to make all of this work would be to move the implementation of function() to the main script. But I assume you wish to keep it separated.