[Matplotlib-devel] What minimum version of python3?

[vincent.adrien at gmail.com]

Well, I do not know how accurate is the following script:
https://github.com/Mariatta/python_versions_and_distros
but looking at the list it returned on 2017-10-15, it looks like Python 
3.6+ may be quite common **outside of the usual left-behind 
distributions ala Debian stable or CentOS**.

Adrien,
conda lover since he had to work with CentOS ^^...

On 02/12/2018 03:48 PM, Nathan Goldbaum wrote:
> Ubuntu 14.04 (which admittedly goes EOL in April) is still on python 
> 3.4, for example.
> 
> On Mon, Feb 12, 2018 at 5:28 PM Matthew Brett <matthew.brett at gmail.com 
> <mailto:matthew.brett at gmail.com>> wrote:
> 
>     On Mon, Feb 12, 2018 at 10:40 PM, Thomas Caswell <tcaswell at gmail.com
>     <mailto:tcaswell at gmail.com>> wrote:
>      > These are derived from today's call:
>      >
>      > Pro 3.6:
>      >  - by the time we release, 3.7 will be out so will support "two
>     most recent
>      > python"
>      >     - this gives 3 years of support on master of each python version
>      > (assuming python sticks
>      >  - ordered, faster dictionaries (as implementation detail in 3.6,
>     guaranteed
>      > in 3.7)
>      >  - guaranteed ordered kwargs / class definitions (do precedence of
>      > conflicting kwaargs)
>      >  - fstrings
>      >  - fspath / pathlib protocol
>      >
>      > Con 3.6:
>      >  - feels a bit agressive as 3.7 is not out yet
>      >  - might get ahead of some LTS releases
>      >    - but older version of Matplotlib will still work
>      >    - user-space environments go along way to fixing this
>      >      - conda
>      >      -
>      >
>     https://www.digitalocean.com/community/tutorials/how-to-install-python-3-and-set-up-a-local-programming-environment-on-centos-7
>      >    - ubuntu 18.04 is planned to be py3.6 by default
>      >
>      > Pro 3.5:
>      >  - more conservative approach
>      >  - pypy3 support (but they will support 3.6 eventually)
>      >
>      > The consensus on the call and on gitter seems to be for 3.6 as
>     the minimum.
> 
>     Man - that seems pretty extreme.   Are the 3.6 features really worth
>     it?  There must be a lot of Linuces at Python 3.5, even at the most
>     recent distribution.  Was there by any chance a majority of conda
>     users on the call?
> 
>     Cheers,
> 
>     Matthew
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