Python学习实例：编写一个记事本GUI

#!/usr/bin/env python#-*- coding:utf-8 -*-from Tkinter import *def donothing():filewin=Toplevel(root)button=Button(filewin,text="hi 这是菜单响应代码段")button.pack()root=Tk()root.title("记事本")root.geometry("800x500")menubar=Menu(root)filemenu = Menu(menubar, tearoff=0)filemenu=Menu(menubar,tearoff=0)filemenu.add_command(label="新建",accelerator="Ctrl+N",command=donothing)filemenu.add_command(label="打开",accelerator="Ctrl+O",command=donothing)filemenu.add_command(label="保存",accelerator="Ctrl+S",command=donothing)filemenu.add_command(label="另存为",accelerator="Ctrl+Shift+S",command=donothing)filemenu.add_separator()filemenu.add_command(label="页面设置",accelerator="U",command=donothing)filemenu.add_command(label="打印",accelerator="Ctrl+P",command=donothing)filemenu.add_separator()filemenu.add_command(label="退出",accelerator="X",command=root.quit)menubar.add_cascade(label="文件",menu=filemenu)editmenu = Menu(menubar, tearoff=0)editmenu.add_command(label="Undo", command=donothing)editmenu.add_separator()editmenu.add_command(label="Cut", command=donothing)editmenu.add_command(label="Copy", command=donothing)editmenu.add_command(label="Paste", command=donothing)editmenu.add_command(label="Delete", command=donothing)editmenu.add_command(label="Select All", command=donothing)menubar.add_cascade(label="Edit", menu=editmenu)helpmenu = Menu(menubar, tearoff=0)helpmenu.add_command(label="Help Index", command=donothing)helpmenu.add_command(label="About...", command=donothing)menubar.add_cascade(label="Help", menu=helpmenu)root.config(menu=menubar)txt=Text(root,undo=True)txt.pack(expand=YES,fill=BOTH)scl=Scrollbar(txt)txt.config(yscrollcommand=scl.set)scl.config(command=txt.yview())scl.pack(side=RIGHT,fill=Y)statusbar=Label(root,text="行 1 column 1",bg="#fff",fg="#00c",relief=SUNKEN,anchor=E)statusbar.pack(side=BOTTOM,fill=X)if __name__ == "__main__":mainloop()