[已解决]《零基础学习python》第35讲课后第三题

cqh123

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)[1] != '.txt':
            another_path += '.txt'
        with open(another_path, "w",encoding='UTF-8') as new_file:
            new_file.write(text_after)

最佳答案

月排行榜 / 总排行榜

wuqramy

2020-4-24 14:59:55

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)[1] != '.txt':
            another_path += '.txt'
        with open(another_path, "w",encoding='UTF-8') as new_file:
            new_file.write(text_after)

跳转到最佳答案楼层

wuqramy

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)[1] != '.txt':
            another_path += '.txt'
        with open(another_path, "w",encoding='UTF-8') as new_file:
            new_file.write(text_after)

cqh123

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

wuqramy

cqh123 发表于 2020-4-24 16:36
ok的话就是返回文本内容吗

是的