GUI实例：利用Tkinter实现简单文本编辑器

 1 from tkinter import *
 2 from tkinter.scrolledtext import ScrolledText
 3 
 4 def load():
 5     with open(filename.get()) as file:
 6         contents.delete('1.0', END)
 7         contents.insert(INSERT, file.read())
 8         
 9 def save():
10     with open(filename.get(), 'w') as file:
11         file.write(contents.get('1.0', END))
12         
13 top = Tk()
14 top.title("Simple Editor")
15 
16 contents = ScrolledText()
17 contents.pack(side=BOTTOM, expand=True, fill=BOTH)
18 
19 filename = Entry()
20 filename.pack(side=LEFT, expand=True, fill=X)
21 
22 Button(text='Open', command=load).pack(side=LEFT)
23 Button(text='Save', command=save).pack(side=LEFT)
24 
25 mainloop()
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