Python 实现简单的登录注册界面

Python 实现简单的登录注册界面

注意：编写代码之前需要导入很重要的包

import tkinter as tk
import pickle
from tkinter import messagebox

主要实现的功能

1. 首先在python字典里定义一对值{'admin':'admin'}如果登录成功显示"How are you! admin"。
2. 如果字典里没有一一对应的一对值{'Username':'Password'},则需要注册，紧接着再登录。

实现过程

登录界面

• • 首先初始化一个window界面

window = tk.Tk()
window.title('Welcome to Mofan Python')
window.geometry('450x300')
.
.
.
window.mainloop()

• • 界面需要一个欢迎的logo,主要使用画布实现

#welcome image
#创建一个200X500的画布
canvas = tk.Canvas(window,height = 200,width = 500)
#logo的路径
image_file = tk.PhotoImage(file = 'E:\\welcome.gif')
#什么位置插入logo图片
image = canvas.create_image(0,0,anchor = 'nw',image = image_file)
canvas.pack(side = 'top')

• • 接下来主要是登录界面的代码实现

tk.Label(window,text = 'Username:').place(x = 50,y = 150)
tk.Label(window,text = 'Password:').place(x = 50,y = 190) var_usr_name = tk.StringVar()
#默认值为MrZhangxd@python.com
var_usr_name.set('MrZhangxd@python.com')
var_usr_pwd = tk.StringVar()
entry_usr_name = tk.Entry(window,textvariable = var_usr_name)
entry_usr_name.place(x = 160,y = 150) entry_usr_pwd = tk.Entry(window,textvariable = var_usr_pwd,show ='*')
entry_usr_pwd.place(x = 160,y = 190)

• • 登录和注册按钮的实现代码

#Login and Sign up button
# command = usr_login 调用usr_login函数
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)

• • 进行登录判断代码：主要用函数判断

#声明usr_login函数
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','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.showinfo(message = 'Error,your password is wrong,try again.')
else:
is_sign_up = tk.messagebox.askyesno('Welcome','You hava not sign up yet.Sign up today?') if is_sign_up:
usr_sign_up()

• • 登录用户不存在需要注册

注册界面

差不多和登录界面一样，然后不进行细细的说明了，有不懂地方的可以给下文邮件地址发邮箱。 def usr_sign_up():
def sign_to_Mofan_Python(): np = new_pwd.get() npf = new_pwd_confirm.get() nn = new_name.get()
with open('usrs_info','rb') as usr_file:
exist_usr_info = pickle.load(usr_file)
if np!= npf:
tk.messagebox.showerror('Error','Password and confirm password must be the same!')
elif nn in exist_usr_info:
tk.messagebox.showerror('Error','The user has already signed up!')
else:
exist_usr_info[nn] = np
with open('usrs_info.pickle','wb') as usr_file:
pickle.dump(exist_usr_info,usr_file)
tk.messagebox.showinfo('Welcome','You have successfully signed up!')
window_sign_up.destroy()
window_sign_up = tk.Toplevel(window)
window_sign_up.geometry('350x200')
window_sign_up.title('Sign up window') new_name = tk.StringVar()
new_name.set('MrZhangxd@python.com')
tk.Label(window_sign_up,text = 'Username:').place(x = 10,y = 10)
entry_new_name = tk.Entry(window_sign_up,textvariable = new_name)
entry_new_name.place(x = 150,y = 10) new_pwd = tk.StringVar()
tk.Label(window_sign_up,text = 'Password:').place(x = 10,y = 50)
entry_new_pwd = tk.Entry(window_sign_up,textvariable = new_pwd,show = '*')
entry_new_pwd.place(x = 150,y = 50) new_pwd_confirm = tk.StringVar()
tk.Label(window_sign_up,text = 'Confirm password:').place(x = 10,y = 90)
entry_comfirm_sign_up = tk.Entry(window_sign_up,textvariable = new_pwd_confirm,show = '*')
entry_comfirm_sign_up.place(x = 150,y = 90) btn_comfirm_sign_up = tk.Button(window_sign_up,text = 'Sign up',command = sign_to_Mofan_Python)
btn_comfirm_sign_up.place(x = 150,y = 130)

运行界面截图

登录界面

注册界面