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Date: Sun, 23 Aug 2015 11:35:21 +1000
Subject: Re: Bug!
From: Chris Angelico <rosuav@gmail.com>
To: Simon Ward <simon@bleah.co.uk>
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Xref: csiph.com comp.lang.python:95575

On Sun, Aug 23, 2015 at 11:22 AM, Simon Ward <simon@bleah.co.uk> wrote:
>
>
> On 23 August 2015 00:06:44 BST, Chris Angelico <rosuav@gmail.com> wrote:
>>Precisely. Every time you support multiple versions of some
>>dependency, you have to test your code on all of them, and in the
>>common case (new features added in newer versions), you have to target
>>the oldest and weakest version.
>
> Just don't add features to older versions. They're in maintenance or bugfix mode.

That's not what I'm talking about... I'm talking about multiple
versions of a dependency. If I write a Python script, and tell people
"this requires CPython 3.6 running on Linux" because that's what I
run... it's not going to be easy to use. Telling people that it
requires Python 3.4 or newer cuts out a lot of people, requiring 3.3
or better is going to include a lot more. It's a tradeoff between
usability and cleanliness of code.

ChrisA