[Python-Dev] Deprecating "U" open mode

[Antoine Pitrou]

On Sat, 29 Sep 2012 00:48:54 +0300
Serhiy Storchaka <storchaka at gmail.com> wrote:
> Since Python 2.3 many open-like functions supports "Universal line mode" 
> (PEP 278 [1]). Since 3.0 (and 2.6) PEP 3116 [2] suggests better 
> alternative -- io.TextWrapper.
> 
> In issue15204 [3] proposed to deprecate "U" mode in open-like functions. 
> In fact I found only three places where "U" mode is mentioned in the 
> standard library:
> 
> * builtin open (io.open) (almost ignored);
> * fileinput (transparently passed to open);
> * zipfile (inefficient and inconsistent implementation).

I'm ok on the principle, I just think we should minimize disruption (I
don't think the "U" mode adds a lot of complexity to the code).

Regards

Antoine.


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