python登陆窗口实例

# Author：979
# blog addr：http://www.cnblogs.com/home979/
#引用自：https://www.cnblogs.com/wwf828/p/7418181.html

import tkinter as tk
from tkinter import messagebox
import pickle

window = tk.Tk()
window.title('Welcome to Mofan Python')
window.geometry('500x300')

# welcome image
canvas = tk.Canvas(window, height=200, width=500)
image_file = tk.PhotoImage(file='logo.png')
image = canvas.create_image(0,0, anchor='nw', image=image_file)
canvas.pack(side='top')

# user information
tk.Label(window, text='用户名: ').place(x=50, y= 150)
tk.Label(window, text='密码: ').place(x=50, y= 190)
# tk.Label(window, text='百度地图密匙: ').place(x=50, y= 220)

#建立输入框
var_usr_name = tk.StringVar()
var_usr_name.set('home979@outlook.com')
entry_usr_name = tk.Entry(window, textvariable=var_usr_name)
entry_usr_name.place(x=160, y=150)

var_usr_pwd = tk.StringVar()
entry_usr_pwd = tk.Entry(window, textvariable=var_usr_pwd, show='*')
entry_usr_pwd.place(x=160, y=190)

def usr_login():
    usr_name = var_usr_name.get()
    usr_pwd = var_usr_pwd.get()
    try:
        with open('usrs_info.pickle', 'rb') as usr_file:
            usrs_info = pickle.load(usr_file)
    except FileNotFoundError:
        with open('usrs_info.pickle', 'wb') as usr_file:
            usrs_info = {'admin': 'admin'}
            pickle.dump(usrs_info, usr_file)
    if usr_name in usrs_info:
        if usr_pwd == usrs_info[usr_name]:
            tk.messagebox.showinfo(title='Welcome', message='How are you? ' + usr_name)
        else:
            tk.messagebox.showerror(message='Error, your password is wrong, try again.')
    else:
        is_sign_up = tk.messagebox.askyesno('Welcome',
                               'You have not sign up yet. Sign up today?')
        if is_sign_up:
            usr_sign_up()

def usr_sign_up():
    exit()
    return


# login and sign up button
btn_login = tk.Button(window, text='Login', command=usr_login)
btn_login.place(x=170, y=230)
btn_sign_up = tk.Button(window, text='Sign up', command=usr_sign_up)
btn_sign_up.place(x=270, y=230)

window.mainloop()