Web2 dec. 2024 · io.UnsupportedOperation: not writable 예시로 아래와 같이 입력하면, 위와 같은 오류가 발생한다. with open ( 'filename') as f: f.write ( 'test') # Error 없는 예시 1 with open ( 'filename', 'w') as f: f.write ( 'test' ) # Error 없는 예시 2 with open ( 'filename', 'a') as f: f.write ( 'test') 위 처럼 'w' 옵션 혹은 'a' 옵션을 주면 오류가 발생하지 않고 정상적으로 진행된다. 'r' … Web16 jul. 2024 · : not writable The exception is handled, and the program can continue its execution (even though the context will stop). ⚠ Just a warning, here we used the argument name type , but be extremely careful when using it because it makes impossible the use of the type built-in function inside of your method.

【Python高级】详解with语句和上下文管理器 - 代码天地

Web25 jan. 2024 · 今天在做python语感练习的时候，报了如下异常: 就是这个红彤彤的异常 io.UnsupportedOperation: not writable 翻译一下,意思是不支持写入的权限。 仔细检查了一下,才发现在第一次打开文件的时候忘了设置权限了,于是添加上了之后,程序就成功运行了!!! 本文参与 腾讯云自媒体分享计划 ，欢迎热爱写作的你一起参与！ 本文分享自作者个人 … Web23 mei 2024 · The Python json module allows to use data in JSON format in your applications. ... line 180, in dump fp.write(chunk) io.UnsupportedOperation: not writable . Using with open and the dump() function we write to the posts.json file. Notice that the ... we get an exception back related to the fact that the file object is not writable. granite places in omaha

day14 文件操作_weixin_48051977的博客-CSDN博客

Web14 dec. 2024 · io .UnsupportedOperation: not writable 代码： # coding: UTF- 8 a = [ 0,1,0,0,000,0,2,2,2,2] with o pen ( './data/feature_name.txt', 'r') as rf: fo r i in a: rf … Webpython-文件读写资料整理. 2、读取文件时，从指针当前位置向后读取。. （可用seek）. 2、打开文件时，如果文件存在则文件所有内容先被清空，所以指针位置默认为0。. ：在文件没有关闭之前，都可以写入进去，默认写入是按照顺序进行写的。. 在文件写入时，是 ... Web14 apr. 2024 · 为你推荐; 近期热门; 最新消息; 心理测试; 十二生肖; 看相大全; 姓名测试; 免费算命; 风水知识 granite places in tampa