【python】通讯录制作

from tkinter import *
import tkinter.messagebox

def save_data():
try:
fileD=open("通讯录.txt","a")
fileD.write("姓名:")
fileD.write("%s\n" % name.get())
fileD.write("联系电话:")
fileD.write("%s\n" % phonenumber.get())
fileD.write("邮箱地址:")
fileD.write("%s\n\n" % mailaddress.get())
name.delete(0,END)
phonenumber.delete(0,END)
mailaddress.delete(0,END)
except Exception as ex:
tkinter.messagebox.showerror("Error!","Can't write to the file\n%s"%ex)

app=Tk()
app.title('Address Book')
Label(app,text="Name:").pack()
name=Entry(app)
name.pack()

Label(app,text="PhoneNumber:").pack()
phonenumber=Entry(app)
phonenumber.pack()

Label(app,text="MailAddress:").pack()
mailaddress=Entry(app)
mailaddress.pack()

Button(app,text="save",command=save_data).pack()
app.mainloop()