Виджет для подсчета строк в текстовом виджете

import tkinter
from tkinter.filedialog import asksaveasfile, askopenfile
from tkinter.messagebox import showerror
import easygui
 
FILE_NAME = tkinter.NONE
 
 
def credit():
    easygui.msgbox(
        " You can save files with buttons Save and Save As \n You can open files with button Open \n You can create new file with button New File")
 
 
def new_file():
    global FILE_NAME
    FILE_NAME = "Untitled"
    text.delete('1.0', tkinter.END)
 
 
def save_file():
    data = text.get('1.0', tkinter.END)
    out = open(FILE_NAME, 'w')
    out.write(data)
    out.close()
 
 
def save_as():
    out = asksaveasfile(mode='w', defaultextension='.txt')
    data = text.get('1.0', tkinter.END)
    try:
        out.write(data.rstrip())
    except Exception:
        showerror(title="Oops!", message="Unable to save file....")
 
 
def open_file():
    global FILE_NAME
    inp = askopenfile(mode="r")
    if inp is None:
        return
    FILE_NAME = inp.name
 
    data = inp.read()
    text.delete('1.0', tkinter.END)
    text.insert('1.0', data)
 
 
root = tkinter.Tk()
root.title("2Text")
root.geometry("600x400")
root.minsize(width=600, height=400)
 
menuBar = tkinter.Menu(root)
fileMenu = tkinter.Menu(menuBar)
menuBar.add_command(label="New", command=new_file)
menuBar.add_command(label="Open", command=open_file)
menuBar.add_command(label="Save", command=save_file)
menuBar.add_command(label="Save As", command=save_as)
menuBar.add_command(label="Exit", command=root.quit)
menuBar.add_command(label="Credits & Info", command=credit)
 
root.config(menu=menuBar)
 
text = tkinter.Text(root, width=400, height=400)
text.pack()
 
root.mainloop()

from tkinter import Tk, Text, Label
 
class App():
    def __init__(self):
        self.root = Tk()
        self.textEditor = Text()
        self.textEditor.pack()
 
        self.rowCounter = Label()
        self.rowCounter.configure(text="0")
        self.rowCounter.pack()
        
        self.timer()
 
        self.root.mainloop()
 
    def timer(self):
        text = self.textEditor.get("1.0", "end")
        lines = text.split("\n")
        self.rowCounter.configure(text=str(len(lines)-1))
        self.root.after(300, self.timer)
 
app=App()