import easygui as g

import os

file_path = g.fileopenbox(default="*.txt")

with open(file_path) as old_file:

title = os.path.basename(file_path)

msg = "文件【%s】的内容如下：" % title

text = old_file.read()

text_after = g.textbox(msg, title, text)

if text != text_after[:-1]:

# textbox 的返回值会追加一个换行符

choice = g.buttonbox("检测到文件内容发生改变，请选择以下操作：", "警告", ("覆盖保存", "放弃保存", "另存为..."))

if choice == "覆盖保存":

with open(file_path, "w") as old_file:

old_file.write(text_after[:-1])

if choice == "放弃保存":

pass

if choice == "另存为...":

another_path = g.filesavebox(default=".txt")

if os.path.splitext(another_path)[1] != '.txt':

another_path += '.txt'

with open(another_path, "w") as new_file:

new_file.write(text_after[:-1])