Python 将小部件从另一个文件中的类导入函数.名称错误：名称'；textbox1'；未定义

在main.py文件的function1函数中，我想从page1.py文件的Page1(tk.Frame)类导入textbox1和textbox2.

我得到错误NameError: name 'textbox1' is not defined，因为textbox1和textbox2没有正确导入.这就是我使用的代码.我做错了什么？如何解决？

main.py个

import tkinter as tk
from tkinter import ttk
from tkinter import *

from page1 import Page1

root = tk.Tk()
root.geometry('480x320')

style = ttk.Style()
style.theme_use('default') 
style.configure('TNotebook', tabposition='wn', background='white', tabmargins=0)
style.configure('TNotebook.Tab', background='white', width=10, focuscolor='yellow', borderwidth=0)
style.map('TNotebook.Tab', background=[('selected', 'yellow')])

nb = ttk.Notebook(root)
nb.place(x=0, y=70)
page1 = Page1(nb, width=492, height=905)
nb.add(page1, text='Tab 1', compound='left')

def function1(textbox1, textbox2):

    val_1 = "example 1"
    textbox1.insert(0, val_1)

    val_2 = "example 1"
    textbox2.insert(0, val_2)

button1 = Button(root, text="Button", command= function1(textbox1, textbox2))
button1.place(x=0, y=0)

root.mainloop()

page1.py个

import tkinter as tk
from tkinter import ttk
from tkinter import *
from tkinter import ttk
import tkinter as tk
import tkinter.font as tkFont
from tkinter import ttk

class Page1(tk.Frame):
    def __init__(self, master, **kw):
        super().__init__(master, **kw)

        self.textbox1 = ttk.Entry(self, width=7)
        self.textbox1.place(x=10, y=10)

        self.textbox2 = ttk.Entry(self, width=7)
        self.textbox2.place(x=10, y=40)