《零基础学习python》第35讲课后第三题
用小甲鱼的代码修改后运行，为什么textbox点cancel还会跳出choicebox代码如下：
import easygui as g
import os
file_path = g.fileopenbox(default="*.txt")
with open(file_path,encoding='UTF-8') 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:
# 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",encoding='UTF-8') as old_file:
old_file.write(text_after)
if choice == "放弃保存":
pass
if choice == "另存为...":
another_path = g.filesavebox(default=".txt")
if os.path.splitext(another_path) != '.txt':
another_path += '.txt'
with open(another_path, "w",encoding='UTF-8') as new_file:
new_file.write(text_after)
因为点Cancle的返回值是None，当然不等于原文件内容啦
这样改就是了：
import easygui as g
import os
file_path = g.fileopenbox(default="*.txt")
with open(file_path,encoding='UTF-8') 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 not text_after:
text_after = text
if text != text_after:
# 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",encoding='UTF-8') as old_file:
old_file.write(text_after)
if choice == "放弃保存":
pass
if choice == "另存为...":
another_path = g.filesavebox(default=".txt")
if os.path.splitext(another_path) != '.txt':
another_path += '.txt'
with open(another_path, "w",encoding='UTF-8') as new_file:
new_file.write(text_after)
wuqramy 发表于 2020-4-24 14:59
因为点Cancle的返回值是None，当然不等于原文件内容啦
这样改就是了：
ok的话就是返回文本内容吗 cqh123 发表于 2020-4-24 16:36
ok的话就是返回文本内容吗
是的
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