Here is a minimal example :-

import tkinter as tk
from tksheet import Sheet

root = tk.Tk()
data = [["Row1-Col1", "Row1-Col2"], ["Row2-Col1", "Row2-Col2"]]
sheet = Sheet(root, data=data, editable=True)
sheet.enable_bindings(("single_select", "edit_cell"))
sheet.pack(expand=True, fill="both")
root.mainloop()

This sheet is editable, unlike the main program