pythonopenmodeu

2020年7月13日—InPython3,the“universalnewline”isusedbydefaultwhenafileisopenintextmode.Thenewlineparameterofopen()controlshowuniversalnewlinesworks.,2019年5月6日—Thereisanadditionalmodecharacterpermitted,'U',whichnolongerhasanyeffect,andisconsidereddeprecated.Itpreviouslyenabled ...,2019年6月18日—TheUmodewasdeprecatedsinceSeptember2012(Python3.3):youhad8yearstohandletheDeprecationWarning.8years...

參考資訊如下
1792948 – python

2020年7月13日 — In Python 3, the “universal newline” is used by default when a file is open in text mode. The newline parameter of open() controls how universal newlines works.

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 ...

Issue 37330: open()

2019年6月18日 — The U mode was deprecated since September 2012 (Python 3.3): you had 8 years to handle the DeprecationWarning. 8 years before actually ...

PEP 278

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 3.11 open(path,"U") -

2023年5月24日 — In Python 3, “universal newline” mode is used by default whenever a file is opened in text mode, and the 'U' flag has been deprecated since ...

Python file open function modes

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

samba fails to build with Python 3.9

2020年2月5日 — In Python 3, the “universal newline” is used by default when a file is open in text mode. The newline parameter of open() controls how universal newlines works.

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

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

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 ...

Why is universal newlines mode deprecated in Python?

2015年9月30日 — The U flag to open 's mode parameter is deprecated in Python 3.3 and removed entirely in Python 3.11. – robertspierre. Commented Jun 15, 2023 ...