用python写一个带有gui界面的密码生成器

from tkinter import *
import random, string
import pyperclip


root =Tk()
root.geometry("400x400")
root.resizable(0,0)
root.title("密码生成器")


heading = Label(root, text = '密码' , font ='arial 15 bold').pack()


pass_label = Label(root, text = '密码长度', font = 'arial 10 bold').pack()
pass_len = IntVar()
length = Spinbox(root, from_ = 8, to_ = 32 , textvariable = pass_len , width = 15).pack()



pass_str = StringVar()

def Generator():
 password = ''
 for x in range (0,4):
  password = random.choice(string.ascii_uppercase)+random.choice(string.ascii_lowercase)+random.choice(string.digits)+random.choice(string.punctuation)
 for y in range(pass_len.get()- 4):
  password = password+random.choice(string.ascii_uppercase + string.ascii_lowercase + string.digits + string.punctuation)
 pass_str.set(password)
 

Button(root, text = "获取密码" , command = Generator ).pack(pady= 5)

Entry(root , textvariable = pass_str).pack()


def Copy_password():
 pyperclip.copy(pass_str.get())

Button(root, text = '复制密码', command = Copy_password).pack(pady=5)


root.mainloop()