import tkinter

 wuya = tkinter.Tk()
 wuya.title("wuya")
 wuya.geometry("900x380+300+150")

 # add image
 pic = r'/Users/ydj/Desktop/未命名文件夹/bg.gif'
 canvas = tkinter.Canvas(wuya)
 image_file = tkinter.PhotoImage(file=pic)
 image = canvas.create_image(0,0,anchor='nw',image=image_file)
 canvas.place(x=0,y=0,height=360, width=619)

 # add lable_title
 lp_title = tkinter.Label(wuya,text='舞涯管理系统',font=("Arial Black",22),fg='#32cd99')
 lp_title.place(x=625,y=150)

 # add copyright_lable
 copyright_lable = tkinter.Label(wuya,text='wuya @ copyright')
 copyright_lable.pack(side='bottom')

 # add name
 name_text = tkinter.Variable()
 name_lb = tkinter.Label(wuya,text='用户名：',font=('微软雅黑',13))
 name_lb.place(x=625,y=200)
 name_input = tkinter.Entry(wuya,textvariable=name_text,width=20)
 name_input.place(x=685,y=200)

 # add password
 pwd_text = tkinter.Variable()
 pwd_lb = tkinter.Label(wuya,text='密码：',font=('微软雅黑',13))
 pwd_lb.place(x=625,y=235)
 pwd_input = tkinter.Entry(wuya,width=20,textvariable=pwd_text)
 pwd_input.place(x=685,y=235)

 # username  and password is real
 def login_func():
     if name_text.get() == "":
         msg = "用户名不能为空"
     elif pwd_text.get() == "":
         msg = "密码不能为空"
     elif pwd_text.get()!="" and name_text.get()!="":
         msg = "登陆成功"
     else:
         msg = ""
     pwd_lb = tkinter.Label(wuya,text=msg,font=('微软雅黑',11),fg='red')
     pwd_lb.place(x=685, y=265)

 # add login_button
 login_button = tkinter.Button(wuya,text='登陆',font=('微软雅黑',12),command=login_func)
 login_button.place(x=770,y=280)

 # add quit_button
 quit_button = tkinter.Button(wuya,text='退出',font=('微软雅黑',12),command=wuya.quit)
 quit_button.place(x=700,y=280)

 wuya.mainloop()