Сохранение введеных данных в форме, после закрытия окна

import tkinter as tk
from tkinter import ttk
 
 
win = tk.Tk()
win.geometry('500x300')
win.title('Расчет')
 
class Form_window:
    name_entry=[]
    fam_entry=[]
    def form_parameters_win(self):
 
            self.win_form = tk.Toplevel(win)
            self.win_form.wm_title('Форма')
 
            tk.Label(self.win_form, text='Имя',width=15).grid(row=2, column=0)
            tk.Label(self.win_form, text='Фамилия',width=15).grid(row=2, column=1)
            self.frame_button=tk.Frame(self.win_form)
            self.frame_button.grid(row=0, column=0,stick='nw',pady=0, padx=7,columnspan=3)
            self.add_button=ttk.Button(self.frame_button, text="Добавить", command=self.add_row).grid(row=0, column=0,pady=10)
            self.ok_button=ttk.Button(self.frame_button, text="Применить", command=self.get_data).grid(row=0, column=1,pady=10)
            self.add_row()
 
 
    def add_row(self):
            self.name_entry.append(ttk.Entry(self.win_form,width=5))
            self.fam_entry.append(ttk.Entry(self.win_form,width=5))
            self.name_entry[-1].grid(column=0, row=len(self.name_entry)+2,padx=0,pady=0,stick="nsew")
            self.fam_entry[-1].grid(column=1, row=len(self.fam_entry)+2,padx=0,pady=0,stick="nsew")
 
 
    def get_data(self):
        global name_data, fam_data
        self.name_data = []
        self.fam_data = []
 
        for i in range(len(self.name_entry)):
            self.name_data.append(self.name_entry[i].get())
            self.fam_data.append(self.fam_entry[i].get())
 
        print (self.name_data, self.fam_data,)
 
 
FW = Form_window()
but=ttk.Button(win, text='Данные', command = FW.form_parameters_win)
but.grid()
win.mainloop()

form.protocol("WM_DELETE_WINDOW", form_close)

    def get_data(self):
        global name_data, fam_data
        self.name_data = []
        self.fam_data = []

from tkinter import*
 
class Infolabel(Frame):
 
     
    def __init__(self, parent, text =''):
        Frame.__init__(self, parent, bg='light green') 
        self.entry_left = Entry(self,  font="Arial 14", width = '25',bd =4)
        self.entry_left.pack(side = LEFT,expand = 1, pady="5", fill = X)
        self.entry_right = Entry(self,  font="Arial 14", width = '25',bd =4)
        self.entry_right.pack(side = LEFT,expand = 1, pady="5", fill = X)
        if text :
            self.entry_left.insert(0, text[0])
            self.entry_right.insert(0, text[1])
            
    def save_info(self):
        self.info = [en.get() for en in (self.entry_left, self.entry_right)]
        
    def get_info(self):
        return self.info
        
 
class Form_window:
    name_entry= []
    fam_entry=[]
    
    def form_parameters_win(self):
            self.win_form = Toplevel(win)
            self.win_form.wm_title('Форма')
            Label(self.win_form, text='Имя',width=15).grid(row=2, column=0)
            Label(self.win_form, text='Фамилия',width=15).grid(row=2, column=1)
            self.frame_button=Frame(self.win_form)
            self.frame_button.grid(row=0, column=0,stick='nw',pady=0, padx=7,columnspan=3)
            self.add_button=Button(self.frame_button, text="Добавить", command=self.add_row).grid(row=0, column=0,pady=10)
            self.ok_button=Button(self.frame_button, text="Применить", command=self.get_data).grid(row=0, column=1,pady=10)
            for obj in __class__.name_entry:
                   self.add_row(obj.get_info())
            self.add_row()
 
    def add_row(self, data = None):
        line = Infolabel(self.win_form, data)
        line.grid()
        if not data:
            __class__.name_entry.append(line)
 
    def get_data(self):
        self.name_data = []
        self.fam_data = []
        for obj in __class__.name_entry:
            obj.save_info()
            left, right = obj.get_info()
            self.name_data.append(left)
            self.fam_data.append(right)
 
        print (self.name_data, self.fam_data,)
 
win = Tk()
win.geometry('500x300')
win.title('Расчет') 
FW = Form_window()
but=Button(win, text='Данные', command = FW.form_parameters_win)
but.grid()
win.mainloop()