[Tkinter] entry filed sum

[leveex]

Hi, trying to learn python and have stuck with entry fields.

I am trying to create a button so the user can add an entry field and write the number in it.
So far I made some progress, but can't figure out how to declare InitVar() for every EntryField so I can summarize user's input.
Or am I doing it totally wrong...
I'll be grateful for any guidance

Heres the code:

import tkinter as tk
from tkinter import *


root = tk.Tk()
root.configure(bg = "#282930")

class Stavka:
    all_entries = [1]
    user_ent = IntVar()
    def __init__(self, master):
        self.addboxButton = Button(master, text='Add +', bg="#282930", fg="white", command=self.addBox)
        self.addboxButton.grid(row=0, column=0, sticky="E")


    def addBox(self):

        nextcolumn = len(self.all_entries)
        # add entry in second row
        self.ent = Entry(root, textvariable=self.user_ent, width=80)
        self.ent.grid(row=nextcolumn, column=1)
        self.all_entries.append( ent )


pred_ent = IntVar()
ent = Entry(root, textvariable=pred_ent, width=80)
ent.grid(row=0, column=1)

s = Stavka(root)


root.mainloop()