python——tkinter界面小实验

1.登陆界面

import tkinter as tk
import tkinter.messagebox
import pickle

root=tkinter.Tk()
root.geometry('400x300')
root.title("欢迎二狗子")

#画布
canvas=tkinter.Canvas(root,width=400,height=300)
pic=tkinter.PhotoImage(file='img2/a.gif')
image=canvas.create_image(0,0,anchor='nw',image=pic)
canvas.pack(side='top')

#登录界面，用户、密码
label1=tkinter.Label(root,text='账号：')
label1.place(x=80,y=80)
label2=tkinter.Label(root,text='密码：')
label2.place(x=80,y=120)

var_usr_name=tkinter.StringVar()
entry_usr_name=tkinter.Entry(root,textvariable=var_usr_name)
entry_usr_name.place(x=130,y=80)

var_usr_pwd=tkinter.StringVar()
entry_usr_pwd=tkinter.Entry(root,textvariable=var_usr_pwd,show='*')
entry_usr_pwd.place(x=130,y=120)

def usr_log_in():
    usr_name=var_usr_name.get()
    user_pwd=var_usr_pwd.get()
    #从本地字典获取用户信息，如果没有则新建本地数据库
    try:
        with open('usr_info.pickle','rb') as usr_file:
            usrs_info=pickle.load(usr_file)
    except FileNotFoundError:
        with open('usr_info.pickle','wb') as usr_file:
            usrs_info={'admin':'admin'}
            pickle.dump(usrs_info,usr_file)
    if usr_name in usrs_info:
        if user_pwd in usrs_info[usr_name]:
            tkinter.messagebox.showinfo(title='welcome',message=usr_name+'欢迎登录')
        else:
            tkinter.messagebox.showerror(title='tip',message='密码错误,请重新输入！')
    elif usr_name=='' or user_pwd=='':
        tkinter.messagebox.showerror(title='tip',message='用户名或密码为空！')
    else:
        go_signup=tkinter.messagebox.askyesno('欢迎','你还没注册，是否现在去注册？')
        if go_signup:
            usr_sign_up()

def usr_sign_up():
    #确认注册时的相应函数
    def signtowcg():
        #获取输入框内的内容
        nn=new_name.get()
        np=new_pwd.get()
        npf=new_pwd_confirm.get()
 
        #本地加载已有用户信息,如果没有则已有用户信息为空
        try:
            with open('usr_info.pickle','rb') as usr_file:
                exist_usr_info=pickle.load(usr_file)
        except FileNotFoundError:
            exist_usr_info={}           
            
        #检查用户名存在、密码为空、密码前后不一致
        if nn in exist_usr_info:
            tk.messagebox.showerror('错误','用户名已存在')
        elif np =='' or nn=='':
            tk.messagebox.showerror('错误','用户名或密码为空')
        elif np !=npf:
            tk.messagebox.showerror('错误','密码前后不一致')

        #注册信息没有问题则将用户名密码写入数据库
        else:
            exist_usr_info[nn]=np
            with open('usr_info.pickle','wb') as usr_file:
                pickle.dump(exist_usr_info,usr_file)
            tk.messagebox.showinfo('欢迎','注册成功')
            #注册成功关闭注册框
            window_sign_up.destroy()

    #新建注册界面
    window_sign_up=tk.Toplevel(root)
    window_sign_up.geometry('350x200')
    window_sign_up.title('注册')
    #用户名变量及标签、输入框
    new_name=tk.StringVar()
    tk.Label(window_sign_up,text='用户名：').place(x=10,y=10)
    tk.Entry(window_sign_up,textvariable=new_name).place(x=150,y=10)

    #密码变量及标签、输入框
    new_pwd=tk.StringVar()
    tk.Label(window_sign_up,text='请输入密码：').place(x=10,y=50)
    tk.Entry(window_sign_up,textvariable=new_pwd,show='*').place(x=150,y=50) 

    #重复密码变量及标签、输入框
    new_pwd_confirm=tk.StringVar()
    tk.Label(window_sign_up,text='请再次输入密码：').place(x=10,y=90)
    tk.Entry(window_sign_up,textvariable=new_pwd_confirm,show='*').place(x=150,y=90)

    #确认注册按钮及位置
    bt_confirm_sign_up=tk.Button(window_sign_up,text='确认注册',
                                 command=signtowcg)
    bt_confirm_sign_up.place(x=150,y=130)

def usr_sign_quit():
    root.destroy()



#按钮,登录、注册、退出
bt_login=tkinter.Button(root,text="登录",command=usr_log_in)
bt_login.place(x=80,y=220)
bt_sign_up=tkinter.Button(root,text="注册",command=usr_sign_up)
bt_sign_up.place(x=160,y=220)
bt_sign_quit=tkinter.Button(root,text="退出",command=usr_sign_quit)
bt_sign_quit.place(x=240,y=220)


root.mainloop()
import tkinter as tk
import