import tkinter as tk
from tkinter import ttk
root = tk.Tk()
label1 = tk.Label(root, text='Текст ячейки').pack()
enter1 = tk.Entry(root)
enter1.pack()
label2 = tk.Label(root, text='Количество колонок').pack()
enter2 = tk.Entry(root)
enter2.pack()
label3 = tk.Label(root, text='Количество строк').pack()
enter3 = tk.Entry(root)
enter3.pack()
heading = 'Заголовок колонки'
panel_of_tasks = ttk.Treeview(root, columns=[heading], show='headings')
panel_of_tasks.heading('#1', text=heading)

def add_line(rows, cols):
    columns = []
    for i in range(cols):
        columns.append(i)
    panel_of_tasks.config(columns=(columns))

    for i in panel_of_tasks.get_children():
        panel_of_tasks.delete(i)

    for i in range(rows):
        panel_of_tasks.insert('', tk.END, values=([enter1.get() for j in range(cols)]))

    panel_of_tasks.config(height=len(panel_of_tasks.get_children()))
    root.config(height=panel_of_tasks['height'])

def delList():
    for i in panel_of_tasks.get_children():
        panel_of_tasks.delete(i)

def saveList():
    with open('list000.csv', 'w', encoding='utf-8') as f:
        for i in panel_of_tasks.get_children():
            for j in panel_of_tasks.item(i)['values']:
                f.write(str(j) + ';')
            f.write('\n')


button1 = ttk.Button(root, text='Add cells', command=lambda: add_line(int(enter3.get()), int(enter2.get()))).pack()
button2 = ttk.Button(root, text='Delete', command=lambda: delList()).pack()
button3 = ttk.Button(root, text='Save', command=lambda: saveList()).pack()
panel_of_tasks.pack()
root.mainloop()