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https://www.python.org/dev/peps/pep-0278/
Jan 14, 2002 · Rationale. Universal newline support is implemented in C, not in Python. This is done because we want files with a foreign newline convention to be import-able, so a Python Lib directory can be shared over a remote file system connection, or between MacPython and Unix-Python on Mac OS X.
https://docs.python.org/2.3/whatsnew/node7.html
6 PEP 278: Universal Newline Support. The three major operating systems used today are Microsoft Windows, Apple's Macintosh OS, and the various Unix derivatives. A minor irritation of cross-platform work is that these three platforms all use different characters to mark the ends of lines in text files.
https://stackoverflow.com/questions/6726953/open-the-file-in-universal-newline-mode-using-the-csv-django-module
PEP278 explained what rU stands for: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 newline interpretation". Mode "rU" is also allowed, for symmetry with "rb".
https://bugs.python.org/issue6759
I suggest two alternatives: 1. Deprecate universal newline support in zipfile. zipfile.ZipExtFile should always work with non-modified bytes, and who need the text, let wraps zipfile.ZipExtFile with io.TextIOWrapper. 2. Automatically wrap a zipfile.ZipExtFile with io.TextIOWrapper if universal newlines mode is enabled.
https://selfsolved.com/problems/python-csv-and-universal-newline-mode
PEP 278 -- Universal Newline Support http://www.python.org/dev/peps/pep-0278/ - found by yliu on April 09, 2009, 05:25 PM UTC this link explains wtf is a universal ...
https://pythonconquerstheuniverse.wordpress.com/2011/05/08/newline-conversion-in-python-3/
May 08, 2011 · If Python is built without universal newline support a mode with ‘U’ is the same as normal text mode. Note that file objects so opened also have an attribute called newlines which has a value of None (if no newlines have yet been seen), ‘\n’, ‘\r’, ‘\r\n’, or a tuple containing all the newline types seen.
https://grokbase.com/t/python/python-dev/078a7frazd/universal-newlines-support-in-python-3-0
(12 replies) Python 3.0 currently has limited universal newlines support: by default, \r\n is translated into \n for text files, but this can be controlled by the newline= keyword parameter. For details on how, see PEP 3116. The PEP prescribes that a lone \r must also be translated, though this hasn't been implemented yet (any volunteers?).
https://grokbase.com/t/python/python-3000/078a7frazd/universal-newlines-support-in-python-3-0
Aug 10, 2007 · (25 replies) Python 3.0 currently has limited universal newlines support: by default, \r\n is translated into \n for text files, but this can be controlled by the newline= keyword parameter. For details on how, see PEP 3116. The PEP prescribes that a lone \r must also be translated, though this hasn't been implemented yet (any volunteers?).
https://docs.python.org/2/library/subprocess.html
This feature is only available if Python is built with universal newline support (the default). Also, the newlines attribute of the file objects stdout, stdin and stderr are …
https://bugs.python.org/issue12623
Antoine, can you explain why subprocess support for universal_newlines is broken? As I can see tests for universal_newlines passed and these looks correct. In general I like your idea to get rid of os.write, but maybe that patch should be landed in 3.4? If not — I will prepare fix ASAP. msg168320 - Author: Chris Jerdonek (chris.jerdonek) *
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