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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Twitter Client on Terminal by Python
Date: Mon, 14 Jul 2014 16:36:40 -0400
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On 7/13/2014 11:51 PM, Chris Angelico wrote:
> On Mon, Jul 14, 2014 at 12:18 PM, Orakaro <nhatminh179@gmail.com> wrote:
>> I use README.md for Github and README.rst for PyPi. Is there a way to use only one file for both sites ?
>
> Ah. I don't know; check the docs for one or the other and see what they'll do.
>
>> I tested my package on Python 2.7 and Python 3.4 But do I have to install all Python 2.6, Python 3.* in my system and test in all environment for sure ?

You don't *have* do anything for free. However, if your package works on 
2.7 and 3.4, it *probably* works as is for 3.2 and 3.3. On Windows at 
least, installing multiple versions is trivial (5 minutes for each).

The more important issue, I think, is what system you have tested on. Up 
to 3.2, including all 2.x, Python had 'wide' and 'narrow' unicode 
builds. On narrow builds (Windows, some *nix), astral (non-BMP) chars 
count as 2. Given Twitter's 140 char limitation, this bug (solved in 
3.3) could affect a Twitter client by giving the length of a 140 char 
tweet as more than 140 chars.

> You can state that it supports 2.7 and 3.4, without testing on any
> other versions. Those are the two current versions - my example was
> showing support for more than just the one latest, but that was just
> an example, nothing more. When Python 3.5 comes out, you'll probably
> want to test on that (and then say "supports 2.7 and 3.4+"), but at
> the moment, "2.7 and 3.4" is fine. If people want to use this with,
> say, 3.3, then they're welcome to try, but they'll know not to presume
> that it'll work.

Even if you test on, say, 2.6, it is up to you whether you want to 
'support' 2.6 with bugfixes, in case a patch for 2.7 does not work on 2.6.

-- 
Terry Jan Reedy