pythonopenmodeu

2015年9月30日—Thelogicbehindthisisfairlysimple.·Becausefilesareopenedinuniversalnewlinemodebydefault.·TheUflagtoopen'smodeparameteris ...,2019年6月27日—Thereisanadditionalmodecharacterpermitted,'U',whichnolongerhasanyeffect,andisconsidereddeprecated.Itpreviouslyenabled ...,2019年6月18日—Currently,the'U'modeisdocumentedasitwillberemovedfromPython4.0.ButIdislikehavingabunchofbackwardincompatible...

參考資訊如下
Why is universal newlines mode deprecated in Python?

2015年9月30日 — The logic behind this is fairly simple. · Because files are opened in universal newline mode by default. · The U flag to open 's mode parameter is ...

What is the non deprecated version of open "U" mode

2019年6月27日 — There is an additional mode character permitted, 'U' , which no longer has any effect, and is considered deprecated. It previously enabled ...

open()

2019年6月18日 — Currently, the 'U' mode is documented as it will be removed from Python 4.0. But I dislike having a bunch of backward incompatible changes in ...

What does the 'U' modifier do when a file is opened using ...

2023年8月22日 — In conclusion, the 'U' modifier in Python serves as an instrumental tool for enabling Universal Newlines when opening files in text mode. By ...

DeprecationWarning

2019年5月6日 — There is an additional mode character permitted, 'U', which no longer has any effect, and is considered deprecated. It previously enabled ...

打开“U”模式的非弃用版本是什么_python_Mangs

2022年8月20日 — 回答问题我正在尝试使用以下命令在python 中读取文本文件: with open(Keys.txt,rU) as csvfile: 但是,这会产生贬值警告。

PEP 278 – Universal Newline Support

2002年1月14日 — In a Python with universal newline support open() the mode parameter can also be “U”, meaning “open for input as a text file with universal ...

Python file open function modes

2015年7月19日 — In addition to the standard fopen() values mode may be 'U' or 'rU'. Python is usually built with universal newlines support; supplying 'U' opens ...