写一个 登陆窗口来学习 tkinter ，还剩下一些问题

代码暂时如下

import tkinter as tk

import webbrowser

import pickle

from tkinter import messagebox

class window(tk.Tk):

    def get_winfo_size(self):

        return self.winfo_screenwidth(),self.winfo_screenheight()

    def center_window(self,width,height):

        screen_width, screen_height = self.get_winfo_size()

        self.width = width

        self.height = height

        self.pos_x = int((screen_width - width) / 2)

        self.pos_y = int((screen_height - height) / 2)

        self.quit()

        # print(self.winfo_reqwidth(), self.winfo_reqheight())

        return super().geometry('{}x{}+{}+{}'.format(width, height, self.pos_x, self.pos_y))

    def get_self_size(self):

        return  self.width,self.height

class login():

    def __init__(self):

        self.user_file = './user_info.pickle'

        login = window()

        login.resizable(0,0)

        login.title('登录窗口')

        login.geometry('500x300')

        login.center_window(500, 300)

        width, height = login.get_self_size()

        print(width, height)

        # 头部窗口

        head_frame = tk.Frame(login)

        # 画布 画背景图片

        canvas = tk.Canvas(head_frame, bg='blue', height=100, width=500)

        image_file = tk.PhotoImage(file='./image/bg.gif')

        image = canvas.create_image(0, 0., anchor='nw', image=image_file)

        canvas.pack()

        head_frame.pack()

        # 中间 窗口

        centroid_frame = tk.Frame(login)

        # 账号 密码框 登录 重置按钮

        self.var_account_name = tk.StringVar()

        self.var_psw = tk.StringVar()

        self.signup_window = None

        account_label = tk.Label(centroid_frame, text='账号', width=4, height=2)

        account_label.grid(row=0, column=0, padx=5, pady=5)

        account_entry = tk.Entry(centroid_frame, width=30, show=None,textvariable=self.var_account_name)

        account_entry.grid(row=0, column=1, padx=5, pady=5)

        psw_label = tk.Label(centroid_frame, text='密码', width=4, height=2)

        psw_entry = tk.Entry(centroid_frame, width=30, show='*',textvariable=self.var_psw)

        psw_label.grid(row=1, column=0, padx=5, pady=5)

        psw_entry.grid(row=1, column=1, padx=5, pady=5)

        register_label = tk.Label(centroid_frame, text="还没有账号？注册", fg="blue", cursor="hand2")

        register_label.grid(row=1, column=2, padx=5, pady=5)

        register_label.bind('<Button-1>',self.register_callback)

        centroid_frame.pack()

        # 尾部窗口

        # tail_frame = tk.Frame(login)

        remember_psw = tk.Checkbutton(login, text='记住密码')

        remember_psw.place(x=120, y=205, anchor='nw')

        auto_login = tk.Radiobutton(login, text='自动登录')

        auto_login.place(x=210, y=205, anchor='nw')

        login_btn = tk.Button(login, text='登录',command=self.login_trigger)

        reset_btn = tk.Button(login, text='重置',command=self.reset_trigger)

        login_btn.place(x=120, y=250, anchor='nw')

        reset_btn.place(x=210, y=250, anchor='nw')

        # tail_frame.place(x=0,y=250,anchor='nw')

        # hyperlink = tkHyperlinkManager.HyperlinkManager（text）

        login.mainloop()

    def login_trigger(self):

        usr_name = self.var_account_name.get()

        psw = self.var_psw.get()

        try:

            with open(self.user_file,'rb') as usr_file:

                user_info = pickle.load(usr_file)

        except (FileNotFoundError,EOFError) as fe:

            with open(self.user_file,'wb') as usr_file:

                user_info = {'admin':'admin'}

                pickle.dump(user_info,usr_file)

        if usr_name not in user_info:

            messagebox.showwarning(title='账号信息提示框',message='用户不存在')

            return

        else:

            if psw != user_info[usr_name]:

                messagebox.showerror(title='密码警告提示框',message='密码错误')

            else:

                messagebox.showinfo(title='登陆成功消息框',message='恭喜！登陆成功！')

    def register_callback(self,event):

        # webbrowser.open_new(r'http://www.baidu.com')

        print('register callback...')

        self.signup_window = window()

        self.signup_window.center_window(400, 250)

        self.signup_window.title('注册窗口')

        # 注册 账号密码

        self.signup_window.var_register_usr_name = tk.StringVar()

        self.signup_window.var_register_usr_psw = tk.StringVar()

        self.signup_window.var_register_usr_psw_confirm = tk.StringVar()

        text_frame = tk.Frame(self.signup_window)

        register_account_label = tk.Label(text_frame,text='账号',width=4,height=2)

        register_account_entry = tk.Entry(text_frame,width=30,show=None,textvariable=self.signup_window.var_register_usr_name)

        register_psw_label = tk.Label(text_frame,text='密码',width=4,height=2)

        register_psw_entry = tk.Entry(text_frame,width=30,show='*',textvariable=self.signup_window.var_register_usr_psw)

        register_psw_confirm_label = tk.Label(text_frame,text='确认密码',width=8,height=2)

        register_psw_confirm_entry = tk.Entry(text_frame,width=30,show='*',textvariable=self.signup_window.var_register_usr_psw_confirm)

        # register_account_label.place(x=0,y=20,anchor='nw')

        # register_account_entry.place(x=30,y=20,anchor='nw')

        # register_psw_label.place(x=0,y=60,anchor='nw')

        # register_psw_entry.place(x=30,y=60,anchor='nw')

        register_account_label.grid(row=0,column=0,padx=15,pady=10)

        register_account_entry.grid(row=0,column=1,padx=15,pady=10)

        register_psw_label.grid(row=1,column=0,padx=15,pady=10)

        register_psw_entry.grid(row=1,column=1,padx=15,pady=10)

        register_psw_confirm_label.grid(row=2,column=0,padx=15,pady=10)

        register_psw_confirm_entry.grid(row=2,column=1,padx=15,pady=10)

        text_frame.pack()

        # 注册按钮

        register_button = tk.Button(self.signup_window,text='注册',command=self.register_user)

        register_button.pack()

        self.signup_window.mainloop()

    def register_user(self):

        register_usr_name = self.signup_window.var_register_usr_name.get()

        register_psw = self.signup_window.var_register_usr_psw.get()

        register_psw_confirm = self.signup_window.var_register_usr_psw_confirm.get()

        # 用户名 规则， 密码 规则  ， 正则等待完善

        print('register_usr_name %s' %register_usr_name)

        print(register_psw , register_psw_confirm)

        if register_psw != register_psw_confirm:

            messagebox.showerror(title='密码不相等提示框',message='两次输入密码不等!')

        else:

            try:

                with open(self.user_file) as usr_file:

                    register_user_info = {register_usr_name:register_psw}

                    print(register_user_info)

                    pickle.dump(register_user_info,usr_file)

                    self.signup_window.destroy()

            except (FileNotFoundError,EOFError) as e:

                print(e)

    def reset_trigger(self):

        self.var_account_name.set('')   # 记得这里用 set 置空

        self.var_psw.set('')

if __name__ == '__main__':

    log = login()