from tkinter import*
import tkinter as tk

user_login ={'aaa':'123456','bbb':'888888','ccc':'333333'}
count=0
def login():
    global count
    username=entry_username.get()
    if username not in user_login:
        label_message.config(text='账号错误！')
    else:
        password=entry_password.get()
        if password == user_login[username]:
            label_message.config(text='登录成功！')
            def open_new_window():
                new_window = tk.Toplevel(root)
                # 在新窗口中创建新的界面
            root = tk.Tk()
            button = tk.Button(root, text="Open New Window", command=open_new_window)
            button.pack()
            root.mainloop()
        else:
            label_message.config(text='密码错误！还可以尝试{}次'.format(2-count))
            count=count+1
            if count == 3:
                label_message.config(text='登录失败!')
                btn_login.config(state='disabled')

window = Tk()
window.title('用户登录')
window.geometry('300x200')

label_username=Label(window,text="账号:")
label_username.pack()
entry_username = Entry(window)
entry_username.pack()
label_passsword = Label(window,text="密码:")
label_passsword.pack()
entry_password = Entry(window,show='*')
entry_password.pack()
btn_login=Button(window,text="登录",command=login)
btn_login.pack()
label_message=Label(window,text="")
label_message.pack()
window.mainloop()